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# MULTI-TECH SYSTEMS, INC.
MT5634ZBA, MT5634ZBAV
Card Type Modem
Chip Set Unidentified
I/O Options 25-pin serial port, power, line in,
line out, microphone in, speaker jack
Maximum Modem Rate 56Kbps
Maximum Fax Rate 14.4Kbps
Data Modulation Bell 103/212A
Protocol
ITU-T V.22, V.22bis, V.32ter, V.32bis,
V.34, K56flex
Fax Modulation ITU-T V.17, V.27ter, V.29
Protocol
Error MNP5, V.42, V.42bis
Correction/Compression
Fax Class Unidentified
Data Bus External
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Line in (RJ-11) | CN1 | Microphone in | CN5 |
|---------------------------+---------+---------------+------|
| Line out (RJ-11) | CN2 | Speaker jack | CN6 |
|---------------------------+---------+---------------+------|
| 25-pin serial port | CN3 | Power switch | SW1 |
|---------------------------+---------+---------------+------|
| Power jack | CN4 | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Label | Position |
|--------------------------------+-------+-------------------|
| í Stereo speaker mode enabled | J8 | Closed |
|--------------------------------+-------+-------------------|
| Mono speaker mode enabled | J8 | Open |
|--------------------------------+-------+-------------------|
| í Dial mode enabled | J10 | Pins 2 & 3 closed |
|--------------------------------+-------+-------------------|
| Leased line enabled | J10 | Pins 1 & 2 closed |
|--------------------------------+-------+-------------------|
| í Answer mode mode enabled | J11 | Pins 2 & 3 closed |
|--------------------------------+-------+-------------------|
| Originate mode enabled | J11 | Pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|-----+----------------+----------+--------------------------|
| TD | Unidentified | Blinking | Modem transmitting data |
|-----+----------------+----------+--------------------------|
| TD | Unidentified | Off | Modem not transmitting |
| | | | data |
|-----+----------------+----------+--------------------------|
| RD | Unidentified | Blinking | Modem is receiving data |
|-----+----------------+----------+--------------------------|
| RD | Unidentified | Off | Modem is not receiving |
| | | | data |
|-----+----------------+----------+--------------------------|
| CD | Unidentified | On | Carrier signal detected |
|-----+----------------+----------+--------------------------|
| CD | Unidentified | Off | Carrier signal not |
| | | | detected |
|-----+----------------+----------+--------------------------|
| 56 | Unidentified | On | Modem connected in |
| | | | K56flex or V.PCM mode |
|-----+----------------+----------+--------------------------|
| 56 | Unidentified | Off | Modem is not connected |
| | | | in K56flex or V.PCM mode |
|-----+----------------+----------+--------------------------|
| 33 | Unidentified | On | Modem connected in V.34 |
| | | | mode at speeds up to |
| | | | 33.6Kbps |
|-----+----------------+----------+--------------------------|
| 33 | Unidentified | Off | Modem is not connected |
| | | | in V.34 mode at speeds |
| | | | up to 33.6Kbps |
|-----+----------------+----------+--------------------------|
| 14 | Unidentified | On | Modem connected in |
| | | | V.32bis mode at 14.4Kbps |
|-----+----------------+----------+--------------------------|
| 14 | Unidentified | Off | Modem is not connected |
| | | | in V.32bis mode at |
| | | | 14.4Kbps |
|-----+----------------+----------+--------------------------|
| OH | Unidentified | On | Modem is on-hook |
|-----+----------------+----------+--------------------------|
| OH | Unidentified | Off | Modem is off-hook |
|-----+----------------+----------+--------------------------|
| TR | Unidentified | On | DTR signal is high |
|-----+----------------+----------+--------------------------|
| TR | Unidentified | Off | DTR signal is low |
|-----+----------------+----------+--------------------------|
| EC | Unidentified | On | Modem is set for V.42 |
| | | | error compression |
|-----+----------------+----------+--------------------------|
| EC | Unidentified | Off | Modem is not set for |
| | | | V.42 error compression |
|-----+----------------+----------+--------------------------|
| EC | Unidentified | Blinking | Data compression enabled |
|-----+----------------+----------+--------------------------|
| FX | Unidentified | On | Modem is in Fax mode |
|-----+----------------+----------+--------------------------|
| FX | Unidentified | Off | Modem is not in Fax mode |
+------------------------------------------------------------+
+---------------------------------------------------------+
| SUPPORTED COMMAND SET |
|---------------------------------------------------------|
| Basic AT Commands |
|---------------------------------------------------------|
| AT, ‘+++’, A/ |
|---------------------------------------------------------|
| A, E, F, H, M, O, P, Q, T, V, W, Y |
|---------------------------------------------------------|
| &C, &F, &G, &V, &Z |
|---------------------------------------------------------|
| Extended AT Commands |
|---------------------------------------------------------|
| \A, \B, \J, \K, \T, \X |
|---------------------------------------------------------|
| Special Commands |
|---------------------------------------------------------|
| -C |
|---------------------------------------------------------|
| S Registers |
|---------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S10, S11 |
|---------------------------------------------------------|
| |
|---------------------------------------------------------|
| Note: See MHI Help File for full command documentation. |
+---------------------------------------------------------+
Proprietary AT Command Set
+------------------------------------------------------------+
| AUTO-MODE DETECTION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects various options for the automatic |
| | detection and negotiation of protocols |
| | during the handshake process if the modem |
| | is communicating with a remote modem of |
| | dissimilar speed. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| N0 | In originate mode, handshake begins at line |
| | speed designated by the S37 register and |
| | the B command |
|--------------+---------------------------------------------|
| í N1 | In originate mode, handshake begins at line |
| | speed designated by the S37 register. and |
| | the B command Modem can shift to a slower |
| | speed if necessary. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| AUXILLARY RELAY CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &J [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls auxiliary relay |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &J0 | Auxiliary relay remains open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATION PROTOCOLS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the communication protocol for data |
| | calls |
|--------------+---------------------------------------------|
| Command | Protocol |
|--------------+---------------------------------------------|
| B0 | Modem will use ITU-T V.22 at 1200bps. |
|--------------+---------------------------------------------|
| B1 | Modem will use Bell 212A at 1200bps. |
|--------------+---------------------------------------------|
| B2 | ITU-T V.23 reverse channel disabled |
|--------------+---------------------------------------------|
| B3 | ITU-T V.23 reverse channel disabled |
|--------------+---------------------------------------------|
| B15 | Modem will use ITU-T V.21 at 300bps. |
|--------------+---------------------------------------------|
| B16 | Modem will use Bell 103J at 300bps. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects communications mode |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| &M0 | Asynchronous mode |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMUNICATIONS MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects communications mode options |
|--------------+---------------------------------------------|
| Command | Mode |
|--------------+---------------------------------------------|
| &Q0 | Asynchronous mode, serial port speed |
| | follows connect speed. |
|--------------+---------------------------------------------|
| í &Q5 | Error correction mode |
|--------------+---------------------------------------------|
| &Q6 | Buffered asynchronous mode |
|--------------+---------------------------------------------|
| &Q8 | MNP error correction mode. Fallback |
| | according to register S36 |
|--------------+---------------------------------------------|
| &Q9 | V.42 or MNP error correction mode. Fallback |
| | according to register S36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA SET READY (DSR) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Sn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects DSR options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &S0 | DSR forced high |
|--------------+---------------------------------------------|
| &S1 | DSR high only while modem is connected |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA TERMINAL READY (DTR) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Dn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects modem response to DTR |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &D0 | Modem does not respond to DTR |
|--------------+---------------------------------------------|
| &D1 | Modem goes to command mode after DTR goes |
| | is off |
|--------------+---------------------------------------------|
| í &D2 | Modem goes to command mode and disconnects |
| | (hangs up) after DTR goes off; Auto-Answer |
| | is disabled. |
|--------------+---------------------------------------------|
| &D3 | Modem is initialized after DTR goes off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAL |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] D<#> [cmds] |
|--------------+---------------------------------------------|
| Description: | Dials telephone number according to any |
| | modifiers included in the string |
|--------------+---------------------------------------------|
| Note: | Any combination of modifiers can be used to |
| | produce the desired dial functions in |
| | sequence. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| DL | Re-dial last number |
|--------------+---------------------------------------------|
| DP | Pulse dialing enabled |
|--------------+---------------------------------------------|
| DS=n | Dial stored telephone number n |
|--------------+---------------------------------------------|
| DT | Tone dialing enabled/Pulse dialing disabled |
|--------------+---------------------------------------------|
| DW | Dialing resumed following dial tone |
| | detection |
|--------------+---------------------------------------------|
| D, | Dialing paused for amount of time specified |
| | in S8 register |
|--------------+---------------------------------------------|
| D! | Flash function initiated. Modem commanded |
| | to go off-hook for specified time before |
| | returning on-hook. |
|--------------+---------------------------------------------|
| D@ | Wait for quiet Answer function enabled. |
| | Modem waits until a "quiet answer," a |
| | ring-back signal followed by silence up to |
| | the time specified in S7, is received prior |
| | to executing the rest of the dial string. |
|--------------+---------------------------------------------|
| D; | Modem returned to idle state after dialing. |
| | The semicolon can only be placed at the end |
| | of the dial command. |
|--------------+---------------------------------------------|
| D$ | Calling card "Bong" detection enabled |
|--------------+---------------------------------------------|
| DV | Switch to speakerphone |
|--------------+---------------------------------------------|
| D^ | Data calling tone transmission disabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables flow control options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &K0 | Flow control disabled |
|--------------+---------------------------------------------|
| í &K3 | RTS to CTS flow control enabled |
|--------------+---------------------------------------------|
| &K4 | XON/XOFF flow control enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ON-LINE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] On |
|--------------+---------------------------------------------|
| Description: | Instructs the modem to return to on-line |
| | state. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| O0 | Return to on-line state. |
|--------------+---------------------------------------------|
| O1 | Return to on-line state and initiate |
| | retrain sequence. |
|--------------+---------------------------------------------|
| O3 | Return to on-line state and initiate |
| | renegotiation sequence. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports default speed and controller |
| | firmware code |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum |
|--------------+---------------------------------------------|
| I2 | Tests and reports ROM checksum |
|--------------+---------------------------------------------|
| I3 | Reports default speed and controller |
| | firmware code |
|--------------+---------------------------------------------|
| I4 | Reports data pump model and revision code |
|--------------+---------------------------------------------|
| I5 | Reports board ID: software version, |
| | hardware version, & country ID |
|--------------+---------------------------------------------|
| I9 | Reports country code |
|--------------+---------------------------------------------|
| I11 | Reports diagnostic information for the last |
| | modem connection |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESTORE PROFILE ON POWER-UP |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Yn [cmds] |
|--------------+---------------------------------------------|
| Description: | Restores a selected profile into the active |
| | profile on power-up (hard reset) |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &Y0 | Restore profile 0 on power-up |
+------------------------------------------------------------+
+------------------------------------------------------------+
| RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables modem to send result codes to the |
| | DTE |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| Q0 | Result code sending enabled |
|--------------+---------------------------------------------|
| Q1 | Result code sending disabled |
|--------------+---------------------------------------------|
| Q2 | Returns OK for backward compatibility |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SELECT CALL PROGRESS RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Xn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables selection of tone detection and |
| | associated result code format options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| X0 | Busy and dial tone detection disabled; |
| | basic result codes enabled. |
|--------------+---------------------------------------------|
| X1 | Busy and dial tone detection disabled; |
| | extended result codes enabled. |
|--------------+---------------------------------------------|
| X2 | Busy tone detection disabled, dial tone |
| | detection enabled; extended result codes |
| | enabled. |
|--------------+---------------------------------------------|
| X3 | Busy tone detection enabled, dial tone |
| | detection disabled; extended result codes |
| | enabled. |
|--------------+---------------------------------------------|
| í X4 | Busy and dial tone detection disabled; |
| | extended result codes enabled. |
|--------------+---------------------------------------------|
| X5 | Busy and dial tone detection disabled; |
| | extended result codes enabled. |
|--------------+---------------------------------------------|
| X6 | Busy and dial tone detection disabled; |
| | extended result codes enabled. |
|--------------+---------------------------------------------|
| X7 | Busy and dial tone detection disabled; |
| | basic result codes enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SOFT RESET |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Zn [cmds] |
|--------------+---------------------------------------------|
| Description: | Restores modem profiles previously saved in |
| | non-volatile RAM using the &W command. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| Z0 | Restore setting to profile saved by last &W |
| | command |
|--------------+---------------------------------------------|
| Z1 | Restore setting to profile saved by last &W |
| | command |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SPEAKER VOLUME |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Ln [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls speaker volume |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| L0 | Low volume setting |
|--------------+---------------------------------------------|
| L1 | Low volume setting |
|--------------+---------------------------------------------|
| L2 | Medium volume setting |
|--------------+---------------------------------------------|
| L3 | Highest volume setting |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STORE ACTIVE PROFILE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Wn [cmds] |
|--------------+---------------------------------------------|
| Description: | Writes the values for the active profile |
| | into the non-volatile RAM |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &W0 | Write the active profile to NVRAM |
|--------------+---------------------------------------------|
| &W1 | Clears user default settings from NVRAM |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST MODES |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Tn |
|--------------+---------------------------------------------|
| Description: | Selects test options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &T0 | End current test |
|--------------+---------------------------------------------|
| &T1 | Begin local analog loopback test |
|--------------+---------------------------------------------|
| &T3 | Begin local digital loopback |
|--------------+---------------------------------------------|
| &T6 | Request remote digital loopback |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMIT CARRIER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the transmit carrier switching |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| C1 | Transmit carrier enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.32 - AUTO-RETRAIN |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Bn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls auto-retrain function if poor line |
| | quality is detected |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &B1 | Auto-retrain enabled if line quality is |
| | poor |
+------------------------------------------------------------+
Extended AT Commands
+------------------------------------------------------------+
| AUTO-FALLBACK/FALL-FORWARD |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %En [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls auto-retrain mode and |
| | fallback/fall-forward |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %E0 | Auto-fallback/fall-forward disabled |
|--------------+---------------------------------------------|
| %E1 | Auto-fallback enabled; fall-forward |
| | disabled |
|--------------+---------------------------------------------|
| í %E2 | Auto-fallback/fall-forward enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMPRESSION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %Cn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects data compression |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %C0 | Data compression disabled |
|--------------+---------------------------------------------|
| %C1 | V.42bis/MNP5 enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECT MODE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls the type of connection the modem |
| | will operate in |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \N0 | Normal mode enabled |
|--------------+---------------------------------------------|
| \N1 | Direct mode enabled |
|--------------+---------------------------------------------|
| \N2 | MNP reliable mode enabled |
|--------------+---------------------------------------------|
| í \N3 | V.42/MNP auto-reliable mode enabled |
|--------------+---------------------------------------------|
| \N4 | V.42 reliable mode enabled |
|--------------+---------------------------------------------|
| \N5 | V.42/MNP auto-reliable mode enabled |
|--------------+---------------------------------------------|
| \N7 | V.42/MNP auto-reliable mode enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISPLAY BLACKLIST NUMBERS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %B [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the list of all the numbers on the |
| | blacklist. Returns ERROR if blacklisting is |
| | disabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTENDED RESULT CODES |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Vn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects extended result codes |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \V0 | Extended result codes disabled |
|--------------+---------------------------------------------|
| í \V1 | Extended result codes enabled |
|--------------+---------------------------------------------|
| \V2 | Extended result codes enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Gn [cmds] |
|--------------+---------------------------------------------|
| Description: | Command nonfunctional; for compatibility |
| | purposes only |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \G0 | Returns OK for backward compatibility |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets type of flow control used by modem |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| \Q0 | Flow control disabled |
|--------------+---------------------------------------------|
| \Q1 | Bi-directional XON/XOFF flow control |
| | enabled |
|--------------+---------------------------------------------|
| í \Q3 | Bi-directional RTS/CTS flow control enabled |
+------------------------------------------------------------+
Special Commands
+------------------------------------------------------------+
| 11-BIT PARITY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] #Pn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the 11-bit parity options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| #P0 | No parity enabled |
|--------------+---------------------------------------------|
| #P0 | Odd parity enabled |
|--------------+---------------------------------------------|
| í #P2 | Even parity enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ASYNCHRONOUS WORD LENGTH |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $EBn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects word length in asynchronous mode |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| $EB0 | 10-bit word length enabled |
|--------------+---------------------------------------------|
| $EB1 | 11-bit word length enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ASYNCHRONOUS WORD LENGTH |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] +ES=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Allows an H.324 video application direct |
| | access to the synchronous data channel. |
| | +ES=? Shows allowable value (6) +ES? |
| | Queries setting |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| +ES=6 | Allows an H.324 video application direct |
| | access to the synchronous data channel |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK ATTEMPTS |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] #CBAn [cmds] |
|--------------+---------------------------------------------|
| Range: | 1-255 |
|--------------+---------------------------------------------|
| Default: | 4 |
|--------------+---------------------------------------------|
| Unit: | 1 callback |
|--------------+---------------------------------------------|
| Description: | Sets the number of callback attempts |
| | allowed after passwords have been exchanged |
| | between modems |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK DELAY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] #CBDn [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Default: | 15 |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem |
| | waits before calling back the remote modem |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK FAILED ATTEMPT DISPLAY |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format | AT [cmds] #CBF? [cmds] |
|--------------+---------------------------------------------|
| Description: | Requests the number of failed callback |
| | passwords since reset power-up. Number may |
| | be stored in NVRAM using &W command |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK FAILED ATTEMPT RESET |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format | AT [cmds] #CBFR [cmds] |
|--------------+---------------------------------------------|
| Description: | Resets number of failed callback passwords |
| | to zero. Does not reset number stored in |
| | NVRAM using &W command |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK INACTIVITY TIMER - LOCAL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] #CBIn [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Default: | 20 |
|--------------+---------------------------------------------|
| Unit: | 1 minute |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem |
| | waits for a command before requiring the |
| | user to reenter the setup password |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK PARITY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] #CBPn [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the parity for callback security |
| | messages |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í #CBP0 | No parity enabled |
|--------------+---------------------------------------------|
| #CBP1 | Odd parity enabled |
|--------------+---------------------------------------------|
| #CBP2 | Even parity enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK SECURITY ENABLE/DISABLE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] #CBSn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables/disables local and remote callback |
| | security |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í #CBS0 | Callback security disabled |
|--------------+---------------------------------------------|
| #CBS1 | Local and remote callback security enabled |
|--------------+---------------------------------------------|
| #CBS2 | Remote callback security enabled |
|--------------+---------------------------------------------|
| #CBS3 | Callback security disabled until local |
| | hangup or reset |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CALLBACK SECURITY RESET |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] #CBRn [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-29 |
|--------------+---------------------------------------------|
| Description: | Clears the password and phone number in |
| | memory location (n) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| COMMAND RESPONSE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %DCn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables/disables AT command response |
| | function |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %DC0 | Modem responds to AT commands |
|--------------+---------------------------------------------|
| %DC1 | Modem ignores AT commands |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DTR DIALING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $Dn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables/disables DTR dialing |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| $D0 | DTR dialing disabled |
|--------------+---------------------------------------------|
| $D1 | DTR dialing enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ENTER SETUP PASSWORD |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] #Sn [cmds] |
|--------------+---------------------------------------------|
| Range: | 1-8 |
|--------------+---------------------------------------------|
| Unit: | ASCII character string (case sensitive) |
|--------------+---------------------------------------------|
| Description: | Enters remote configuration setup password. |
| | Default password is MTSMODEM |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ESCAPE SEQUENCE - REMOTE |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | %%%AT [cmds] <CR> |
|--------------+---------------------------------------------|
| Description: | Initiates remote configuration mode while |
| | on-line with remote modem. The remote |
| | configuration escape character is defined |
| | by register S13 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SPEAKER CODEC LOOPBACK |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &&S [cmds] |
|--------------+---------------------------------------------|
| Description: | Provides aloopbcak from the microphone to |
| | the speaker. |
|--------------+---------------------------------------------|
| Description: | For testing and debugginh purposes only |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STORE CALLBACK PASSWORD |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] #CBNn=x [cmds] |
|--------------+---------------------------------------------|
| Range (n): | 0-29 |
|--------------+---------------------------------------------|
| Range (x): | 6-10 |
|--------------+---------------------------------------------|
| Unit (x): | ASCII character string (excluding +or -) |
|--------------+---------------------------------------------|
| Description: | Sets callback security password (x) for the |
| | memory location (n) |
+------------------------------------------------------------+
+------------------------------------------------------------+
| STORE SETUP PASSWORD |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format | AT [cmds] #S=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 1-8 |
|--------------+---------------------------------------------|
| Unit: | ASCII character string (case sensitive) |
|--------------+---------------------------------------------|
| Description: | Stores a new remote configuration setup |
| | password. Default password is MTSMODEM |
+------------------------------------------------------------+
S(STATUS) -REGISTERS
+------------------------------------------------------------+
| 56K DCE LINE SPEED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S38=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the maximum allowable 56K downstream |
| | rate attempted during handshake process. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S38=0 | 56K disabled |
|--------------+---------------------------------------------|
| S38=1 | 56K automatic speed select |
|--------------+---------------------------------------------|
| S38=2 | 32.0Kbps |
|--------------+---------------------------------------------|
| S38=3 | 34.0Kbps |
|--------------+---------------------------------------------|
| S38=4 | 36.0Kbps |
|--------------+---------------------------------------------|
| S38=5 | 38.0Kbps |
|--------------+---------------------------------------------|
| S38=6 | 40.0Kbps |
|--------------+---------------------------------------------|
| S38=7 | 42.0Kbps |
|--------------+---------------------------------------------|
| S38=8 | 44.0Kbps |
|--------------+---------------------------------------------|
| S38=9 | 46.0Kbps |
|--------------+---------------------------------------------|
| S38=10 | 48.0Kbps |
|--------------+---------------------------------------------|
| S38=11 | 50.0Kbps |
|--------------+---------------------------------------------|
| S38=12 | 52.0Kbps |
|--------------+---------------------------------------------|
| S38=13 | 54.0Kbps |
|--------------+---------------------------------------------|
| S38=14 | 56.0Kbps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 56K DIGITAL LOSS |
|------------------------------------------------------------|
| Type: | Register |
|------------------------------------------------------------|
| Format: | AT [cmds] S108=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the 56Kbps digital loss if using |
| | the modem thru a PBX line |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S108=0 | -0dB digital loss; robbed bit signaling |
| | disabled |
|---------------+--------------------------------------------|
| S108=1 | -3dB PBX digital loss |
|---------------+--------------------------------------------|
| S108=2 | -2dB digital loss |
|---------------+--------------------------------------------|
| S108=3 | -3dB digital loss |
|---------------+--------------------------------------------|
| í S108=6 | -6dB digital loss |
|---------------+--------------------------------------------|
| S108=7 | -0dB digital loss; robbed bit signaling |
| | enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BACKSPACE CHARACTER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S5=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-127 |
|--------------+---------------------------------------------|
| Unit: | ASCII |
|--------------+---------------------------------------------|
| Description: | Selects a character used for backspace <BS> |
|------------------------------------------------------------|
| Note: A value greater than 32 will disable backspace |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DCE LINE SPEED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S37=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the maximum allowable data exchange |
| | rate attempted during handshake process. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S37=0 | Maximum speed |
|--------------+---------------------------------------------|
| S37=1 | Reserved |
|--------------+---------------------------------------------|
| S37=2 | 1200/75bps |
|--------------+---------------------------------------------|
| S37=3 | 300bps |
|--------------+---------------------------------------------|
| S37=4 | Reserved |
|--------------+---------------------------------------------|
| S37=5 | 1200bps |
|--------------+---------------------------------------------|
| S37=6 | 2400bps |
|--------------+---------------------------------------------|
| S37=7 | 4800bps |
|--------------+---------------------------------------------|
| S37=8 | 7200bps |
|--------------+---------------------------------------------|
| S37=9 | 9600bps |
|--------------+---------------------------------------------|
| S37=10 | 12.0Kbps |
|--------------+---------------------------------------------|
| S37=11 | 14.4Kbps |
|--------------+---------------------------------------------|
| S37=12 | 16.8Kbps |
|--------------+---------------------------------------------|
| S37=13 | 19.2Kbps |
|--------------+---------------------------------------------|
| S37=14 | 21.6Kbps |
|--------------+---------------------------------------------|
| S37=15 | 24.0Kbps |
|--------------+---------------------------------------------|
| S37=16 | 26.4Kbps |
|--------------+---------------------------------------------|
| S37=17 | 28.8Kbps |
|--------------+---------------------------------------------|
| S37=18 | 31.2Kbps |
|--------------+---------------------------------------------|
| S37=19 | 33.6Kbps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIALING DELAY |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S6=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 2-65 |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Duration of delay after modem goes off-hook |
| | and before dialing |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERROR CORRECTION NEGOTIATION |
|------------------------------------------------------------|
| Type: | Register |
|------------------------+-----------------------------------|
| Format | AT [cmds] S36=n [cmds] |
|------------------------+-----------------------------------|
| Description: | Selects the action of the modem |
| | if it fails to connect when error |
| | control is selected. |
|------------------------------------------------------------|
| Command | S48=7 | S48=128 |
|-----------+-----------------------+------------------------|
| S36=0 | LAPM or hang-up | Not used |
|-----------+-----------------------+------------------------|
| S36=1 | LAPM or Asynchronous | Asynchronous |
|-----------+-----------------------+------------------------|
| S36=2 | LAPM or hang-up | Not used |
|-----------+-----------------------+------------------------|
| S36=3 | LAPM or Asynchronous | Asynchronous |
|-----------+-----------------------+------------------------|
| S36=4 | LAPM, MNP, or hang-up | MNP or hang-up |
|-----------+-----------------------+------------------------|
| S36=5 | LAPM, MNP, or | MNP or Asynchronous |
| | Asynchronous | |
|-----------+-----------------------+------------------------|
| S36=6 | LAPM, MNP, or hang-up | MNP or hang-up |
|-----------+-----------------------+------------------------|
| S36=7 | LAPM, MNP, or | MNP or Asynchronous |
| | Asynchronous | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ESCAPE CHARACTER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S9=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 1-127 |
|--------------+---------------------------------------------|
| Unit: | ASCII |
|--------------+---------------------------------------------|
| Description: | Sets ASCII code for remote configuration |
| | escape character |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FEATURE NEGOTIATION |
|------------------------------------------------------------|
| Type: | Register |
|------------------------------------------------------------|
| Format: | AT [cmds] S48=n [cmds] |
|------------------------------------------------------------|
| Range: | 7, 128 |
|------------------------------------------------------------|
| Description: | Selects active error correction and |
| | compression protocols. See S36, error |
| | correction negotiation table |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S30=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | 1 minute |
|--------------+---------------------------------------------|
| Description: | Maximum duration of DTE and DCE inactivity |
| | allowed prior to initiating hang-up |
| | process. |
|------------------------------------------------------------|
| Note: S30=0 disables the timer and allows indefinite |
| inactivity. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| INACTIVITY TIMER |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S89=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0, 5-255 |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Sets the length of time that the modem does |
| | not receive information before it |
| | disconnects; S89=0 will disable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| NO CARRIER TIME-OUT |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S7=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 1-255 |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Maximum wait time the modem uses after |
| | dialing to detect a carrier signal from the |
| | remote modem for both originating and |
| | answering calls. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PAUSE DURATION |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S8=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-65 |
|--------------+---------------------------------------------|
| Unit: | 1 second |
|--------------+---------------------------------------------|
| Description: | Duration of pause per comma (,) command |
| | used in a command or dial string |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TONE PULSE DURATION |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S11=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 50-150 |
|--------------+---------------------------------------------|
| Unit: | 1 ms |
|--------------+---------------------------------------------|
| Description: | DTMF tone pulse duration and time between |
| | tone pulses for tone dialing operations. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.25 CALLING TONE |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S35=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-1 |
|--------------+---------------------------------------------|
| Unit: | Decimal |
|--------------+---------------------------------------------|
| Description: | Enables V.25 data calling tone, which |
| | allows remote data/fax/voice discrimination |
|------------------------------------------------------------|
| Note: S35=0 disables V.25 data calling tone. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.34 MODULATION |
|------------------------------------------------------------|
| Type: | Register |
|----------------+-------------------------------------------|
| Format | AT [cmds] S28=n [cmds] |
|----------------+-------------------------------------------|
| Range: | 0-255 |
|----------------+-------------------------------------------|
| Unit: | Decimal |
|----------------+-------------------------------------------|
| Description: | Enables V.34 modulation |
|------------------------------------------------------------|
| Note: S28=0 disables V.34 modulation. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V32bis STARTUP MODE |
|------------------------------------------------------------|
| Type: | Register |
|------------------+-----------------------------------------|
| Format | AT [cmds] S43=n [cmds] |
|------------------+-----------------------------------------|
| Range: | 0-1 |
|------------------+-----------------------------------------|
| Unit: | Decimal |
|------------------+-----------------------------------------|
| Description: | Enables V.32bis start-up auto mode |
| | operation |
|------------------------------------------------------------|
| Note: S43=0 disables V.32bis start-up auto mode. For |
| testing purposes only. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V32bis, V.22bis AUTO RATE |
|------------------------------------------------------------|
| Type: | Register |
|----------------+-------------------------------------------|
| Format | AT [cmds] S42=n [cmds] |
|----------------+-------------------------------------------|
| Range: | 0-1 |
|----------------+-------------------------------------------|
| Unit: | Decimal |
|----------------+-------------------------------------------|
| Description: | Enables V.32bis and V.22bis auto rate |
|------------------------------------------------------------|
| Note: S42=0 disables V.32bis and V.22bis auto rate. |
| For testing purposes only. |
+------------------------------------------------------------+