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# MULTI-TECH SYSTEMS, INC.
MT5600ZDXV
Card Type Modem
Chip Set Unidentified
I/O Options 25-pin serial port, power, line in,
line out
Maximum Modem Rate 56Kbps
Maximum Fax Rate 14.4Kbps
Data Modulation Bell 103/212A
Protocol
ITU-T V.21, V.22, V.22bis, V.23,
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 I & II
Data Bus External
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|--------------------+-------+-----------------------+-------|
| Power connector | CN1 | Line out (RJ-11) | CN3 |
|--------------------+-------+-----------------------+-------|
| 25-pin serial port | CN2 | Line in (RJ-45 | CN4 |
| | | connector) | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 mode |
|-----+----------------+----------+--------------------------|
| 56 | Unidentified | Off | Modem is not connected |
| | | | in K56flex mode |
|-----+----------------+----------+--------------------------|
| 28 | Unidentified | On | Modem connected in V.34 |
| | | | mode |
|-----+----------------+----------+--------------------------|
| 28 | Unidentified | Off | Modem is not connected |
| | | | in V.34 mode |
|-----+----------------+----------+--------------------------|
| 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, B, E, H, M, O, Q, V, W, X, Y, Z |
|------------------------------------------------------------|
| &C, &G, &T, &W, &Y, &Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| \A, \B, \K, \N, \V |
|------------------------------------------------------------|
| %C, %E, %L, %Q |
|------------------------------------------------------------|
| Special Commands |
|------------------------------------------------------------|
| -K, #CID |
|------------------------------------------------------------|
| S Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S6, S7, S8, S9, S10, S11, S12, S18, |
| S21, S24, S25, S29, S30, S32, S33, |
|------------------------------------------------------------|
| S38, S91, S92, S95 |
|------------------------------------------------------------|
| 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 | Auto-mode detection disabled. Handshake |
| | begins at line speed designated by the S37 |
| | register. If S37=0 handshake follows |
| | interface speed |
|--------------+---------------------------------------------|
| í N1 | Auto-mode detection enabled. Handshake |
| | begins at line speed designated by the S37 |
| | register. If S37=0 handshake at highest |
| | possible speed with fallback to lower speed |
| | if necessary |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONFIGURATION PROFILES & CALL STATISTICS |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &V [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays active and stored configuration |
| | profiles & statistics for last connection |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &V0 | Displays the active configuration, the two |
| | stored user profiles, and the first four |
| | phone numbers |
|--------------+---------------------------------------------|
| &V1 | Displays statistics for last connection |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DATA SET READY (DSR) |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Sn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects DSR options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &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 | DTR ignored |
|--------------+---------------------------------------------|
| &D1 | DTR drop causes online command mode |
|--------------+---------------------------------------------|
| í &D2 | DTR drop causes modem to go on-hook |
|--------------+---------------------------------------------|
| &D3 | Resets on low DTR |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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. |
|--------------+---------------------------------------------|
| DV | Switch to speakerphone |
|--------------+---------------------------------------------|
| D$ | Calling card "Bong" detection enabled |
|--------------+---------------------------------------------|
| D^ | Data calling tone transmission disabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FACTORY DEFAULT PROFILE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &F [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets values in active profile to values |
| | found in the default profile |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &F0 | Load factory configuration 0 |
|--------------+---------------------------------------------|
| &F1 | Load factory configuration 1 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables flow control options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &K0 | Flow control disabled |
|--------------+---------------------------------------------|
| &K3 | RTS/CTS flow control enabled |
|--------------+---------------------------------------------|
| &K4 | XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| &K5 | Transparent XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| &K6 | Both RTS/CTS & XON/XOFF flow control |
| | enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| JACK TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Jn [cmds] |
|--------------+---------------------------------------------|
| Description: | Command non-functional; for compatibility |
| | only |
+------------------------------------------------------------+
+------------------------------------------------------------+
| LINE TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Ln [cmds] |
|--------------+---------------------------------------------|
| Description: | Command non-functional; for compatibility |
| | only |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports product code |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum |
|--------------+---------------------------------------------|
| I2 | Tests and reports ROM checksum |
|--------------+---------------------------------------------|
| I3 | Reports firmware version and application |
| | codes |
|--------------+---------------------------------------------|
| I4 | Reports OEM identifier string in either |
| | binary or ASCII format |
|--------------+---------------------------------------------|
| I5 | Reports country code |
|--------------+---------------------------------------------|
| I6 | Reports data pump model and internal code |
|--------------+---------------------------------------------|
| I7 | Reports country code |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
SPECIAL COMMANDS
+------------------------------------------------------------+
| BLACKLIST |
|------------------------------------------------------------|
| Type: | Immidiate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *B [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays blacklisted numbers. If no numbers |
| | are blacklisted, returns OK. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DELAY |
|------------------------------------------------------------|
| Type: | Immidiate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *D [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays delayed numbers with the delay |
| | associated with each. If no numbers are |
| | delayed, returns OK. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISTINCTIVE RING |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] -SDR=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the distinctive ring settings |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| -SDR=0 | Distinctive ring disabled |
|--------------+---------------------------------------------|
| -SDR=1 | Type 1 enabled |
|--------------+---------------------------------------------|
| -SDR=2 | Type 2 enabled |
|--------------+---------------------------------------------|
| -SDR=3 | Type 1 and 2 enabled |
|--------------+---------------------------------------------|
| -SDR=4 | Type 3 enabled |
|--------------+---------------------------------------------|
| -SDR=5 | Type 1 and 3 enabled |
|--------------+---------------------------------------------|
| -SDR=6 | Type 2 and 3 enabled |
|--------------+---------------------------------------------|
| -SDR=7 | Type 1, 2, and 3 enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLASH MEMORY |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] **n [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls download to flash memory |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| **0 | Downloads last sensed speed into flash |
| | memory |
|--------------+---------------------------------------------|
| **1 | Downloads 38.4Kbps into flash memory |
|--------------+---------------------------------------------|
| **2 | Downloads 57.6Kbps into flash memory |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MNP10 - FALLBACK |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] -Qn [cmds] |
|--------------+---------------------------------------------|
| Description: | Command non-functional; for compatibility |
| | only |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MNP10 - LINK NEGOTIATION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] *Hn [cmds] |
|--------------+---------------------------------------------|
| Description: | Command non-functional; for compatibility |
| | only |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MNP10 - POWER LEVEL ADJUST |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] )Mn [cmds] |
|--------------+---------------------------------------------|
| Description: | Command non-functional; for compatibility |
| | only |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MNP10 - POWER LEVEL ADJUST |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] -SEC=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-30 |
|--------------+---------------------------------------------|
| Unit: | -1dBm |
|--------------+---------------------------------------------|
| Description: | Controls automatic transmit power level |
| | adjustment during MNP 10 link negotiation |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| -SEC=0 | MNP10 disabled. Transmission level is set |
| | in the S91 register |
|--------------+---------------------------------------------|
| -SEC=1, | MNP10 enabled. Set transmit level |
| [tx_lev] | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MODULATION SELECTION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] +MS=x [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets options for active protocol; the |
| | transfer rates specified by z and a must be |
| | valid for the protocol selected. +MS? |
| | queries setting |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| x=0 | V.21 |
|--------------+---------------------------------------------|
| x=1 | V.22 |
|--------------+---------------------------------------------|
| x=2 | V.22bis |
|--------------+---------------------------------------------|
| x=3 | V.23 |
|--------------+---------------------------------------------|
| x=9 | V.32 |
|--------------+---------------------------------------------|
| x=10 | V.32bis |
|--------------+---------------------------------------------|
| x=11 | V.34 |
|--------------+---------------------------------------------|
| x=56 | K56flex |
|--------------+---------------------------------------------|
| x=64 | Bell 103 |
|--------------+---------------------------------------------|
| x=69 | Bell 212A |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PLUG & PLAY SERIAL NUMBER |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %7n [cmds] |
|--------------+---------------------------------------------|
| Range: | 8 |
|--------------+---------------------------------------------|
| Unit: | Hexidecimal |
|--------------+---------------------------------------------|
| Description: | Sets and stores numbers for serial plug & |
| | play |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PLUG & PLAY VENDOR ID & PRODUCT NUMBER |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %8n [cmds] |
|--------------+---------------------------------------------|
| Range: | 3 (ASCII), 4 (hex) |
|--------------+---------------------------------------------|
| Unit: | ASCII, Hexidecimal |
|--------------+---------------------------------------------|
| Description: | Sets and stores numbers for serial plug & |
| | play |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMISSION LEVEL - CELLULAR |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] @Mn [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-30 |
|--------------+---------------------------------------------|
| Unit: | -1dBm |
|--------------+---------------------------------------------|
| Description: | Command non-functional; for compatibility |
| | only |
+------------------------------------------------------------+
+------------------------------------------------------------+
| V.32 - COMPROMISE EQUALIZER |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] :En [cmds] |
|--------------+---------------------------------------------|
| Description: | Command non-functional; for compatibility |
| | only |
+------------------------------------------------------------+
S(STATUS) -REGISTERS
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S14 |
|------------------------------------------------------------|
| Format: | AT [cmds] S14=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-174 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls echo, result codes and display, |
| | dial mode, and answer/originate mode. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | 0 | Not used |
|------+-------+---------------------------------------------|
| 1 | 0 | Command echo disabled |
| | | |
| | 1 | Command echo enabled |
|------+-------+---------------------------------------------|
| 2 | 0 | Result codes enabled |
| | | |
| | 1 | Result codes disabled |
|------+-------+---------------------------------------------|
| 3 | 0 | Display result codes in numeric format |
| | | |
| | 1 | Display result codes in verbose format |
|------+-------+---------------------------------------------|
| 4 | 0 | Not used |
|------+-------+---------------------------------------------|
| 5 | 0 | Tone dial enabled |
| | | |
| | 1 | Pulse dial enabled |
|------+-------+---------------------------------------------|
| 6 | 0 | Not used |
|------+-------+---------------------------------------------|
| 7 | 0 1 | Answer mode enabled |
| | | |
| | | Originate mode enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S22 |
|------------------------------------------------------------|
| Format | AT [cmds] S22=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls speaker volume and controls, |
| | limits results codes, and pulse dial |
| | make/break ratio. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 1, 0 | 00 | Off volume |
| | | |
| | 01 | Low level volume |
| | | |
| | 10 | Medium level volume |
| | | |
| | 11 | High level volume |
|------+-------+---------------------------------------------|
| 3, 2 | 00 | Speaker off |
| | | |
| | 01 | Speaker off on carrier |
| | | |
| | 10 | Speaker always on |
| | | |
| | 11 | Speaker on during handshake |
|------+-------+---------------------------------------------|
| 6 - | 000 | Basic result codes only enabled |
| 4 | | |
| | 100 | Basic and connection speed result codes |
| | | enabled |
| | 101 | |
| | | Basic and connection speed result codes and |
| | 110 | dialtone detection enabled |
| | | |
| | 111 | All result codes except dialtone detection |
| | | enabled |
| | | |
| | | All result codes enabled |
|------+-------+---------------------------------------------|
| 7 | 0 | Not used |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S23 |
|------------------------------------------------------------|
| Format | AT [cmds] S23=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-189 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Grants/denies remote digital loopback, |
| | controls DTE rate and parity, and sets |
| | guard tone. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | 0 | Remote digital loopback denied |
| | | |
| | 1 | Remote digital loopback allowed |
|------+-------+---------------------------------------------|
| 3 - | 000 | Sets serial port speed to 0-300bps |
| 1 | | |
| | 001 | Sets serial port speed to 600bps |
| | | |
| | 010 | Sets serial port speed to 1200bps |
| | | |
| | 011 | Sets serial port speed to 2400bps |
| | | |
| | 100 | Sets serial port speed to 4800bps |
| | | |
| | 101 | Sets serial port speed to 9600bps |
| | | |
| | 110 | Sets serial port speed to 19.2Kbps |
| | | |
| | í 111 | Sets serial port speed to 38.4Kbps or |
| | | higher |
|------+-------+---------------------------------------------|
| 5, 4 | 00 | Parity even |
| | | |
| | 01 | Space Parity |
| | | |
| | 10 | Parity odd |
| | | |
| | í 11 | Mark or No Parity |
|------+-------+---------------------------------------------|
| 7, 6 | í 00 | Guard tone disabled |
| | | |
| | 01 | Guard tone 550Hz enabled |
| | | |
| | 10 | Guard tone 1800Hz enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S27 |
|------------------------------------------------------------|
| Format | AT [cmds] S27=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-111 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Selects synchronous/asynchronous mode, line |
| | type, clock source, and ITU-T/Bell modes. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 3, | 00 | Asynchronous mode, serial port speed |
| 1, 0 | | follows connect speed |
| | 01 | |
| | | Asynchronous off-line command mode and |
| | 10 | synchronous connect mode |
| | | |
| | 11 | Asynchronous off-line command mode; modem |
| | | autodials first number in directory, then |
| | | synchronous connect mode |
| | | |
| | | Asynchronous off-line command mode on low |
| | | DTR, synchronous connect mode on high DTR |
|------+-------+---------------------------------------------|
| 2 | 0 | Switched line |
| | | |
| | 1 | Leased line |
|------+-------+---------------------------------------------|
| 5, 4 | 00 | Local modem generates transmit clock source |
| | | |
| | 01 | Local DTE generates transmit clock source |
| | | |
| | 10 | Remote DCE/DTE generates transmit clock |
| | | source |
|------+-------+---------------------------------------------|
| 6 | 0 | ITU/T mode |
| | | |
| | 1 | Bell mode |
|------+-------+---------------------------------------------|
| 7 | 0 | Not Used |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S28 |
|------------------------------------------------------------|
| Format | AT [cmds] S28=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-31 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls pulse dialing. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 4, 3 | 00 | 39ms make/61ms break at 10pps |
| | | |
| | 01 | 33ms make/67ms break at 10pps |
| | | |
| | 10 | 39ms make/61ms break at 20pps |
| | | |
| | 11 | 33ms make/67ms break at 20pps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S31 |
|------------------------------------------------------------|
| Format: | AT [cmds] S31=n [cmds] |
|-----------------+------------------------------------------|
| Range: | 0-10 |
|-----------------+------------------------------------------|
| Description: | Select automode, extended result code |
| | format and caller ID functions |
|------------------------------------------------------------|
| Bit | Value | Function |
|-----------+-------+----------------------------------------|
| 0 | 0 | Not used |
|-----------+-------+----------------------------------------|
| 1 | 0 | Auto-mode detection disabled |
| | | |
| | í 1 | Auto-mode detection enabled |
|-----------+-------+----------------------------------------|
| 3, 2 | 00 | Enables CONNECT result codes to report |
| | | DTE speed |
| | 01 | |
| | | Full reporting of CONNECT result codes |
| | 10 | |
| | | Enables CONNECT result codes to report |
| | | DCE speed |
|-----------+-------+----------------------------------------|
| 5, 4 | í 0 | Caller ID disabled |
| | | |
| | 1 | Short formatted Caller ID enabled |
| | | |
| | 2 | Long unformatted Caller ID enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S40 |
|------------------------------------------------------------|
| Format | AT [cmds] S40=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-255 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls power level and break handling; |
| | selects MNP extended services, link |
| | negotiation, and block size. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 1, 0 | í 0 | MNP Extended Services disabled |
| | | |
| | 1 | MNP Extended Services enabled |
|------+-------+---------------------------------------------|
| 2 | 0 | Not used |
|------+-------+---------------------------------------------|
| 5, | 000 | AT\K0 |
| 4, 3 | | |
| | 001 | AT\K1 |
| | | |
| | 010 | AT\K2 |
| | | |
| | 011 | AT\K3 |
| | | |
| | 100 | AT\K4 |
| | | |
| | í 101 | AT\K5 |
|------+-------+---------------------------------------------|
| 7, 6 | 00 | MNP block size is 64 characters |
| | | |
| | í 01 | MNP block size is 128 characters |
| | | |
| | 10 | MNP block size is 192 characters |
| | | |
| | 11 | MNP block size is 256 characters |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BIT-MAPPED REGISTER S41 |
|------------------------------------------------------------|
| Format | AT [cmds] S41=n [cmds] |
|--------------+---------------------------------------------|
| Range: | Unidentified |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Selects compression, auto-retrain, and MNP |
| | mode. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 1 - | 00 | Data compression disabled |
| 0 | | |
| | 01 | MNP5 enabled |
| | | |
| | 10 | V.42bis enabled |
| | | |
| | í 11 | MNP5 and V.42bis enabled |
|------+-------+---------------------------------------------|
| 2 | 0 | Auto-retrain, fallback/fall-forward |
| | | disabled |
| | 1 | |
| | | Auto-retrain, fallback/fall-forward enabled |
|------+-------+---------------------------------------------|
| 3-5 | 0 | Not Used |
|------+-------+---------------------------------------------|
| 6 | 0 | Auto-retrain enabled |
| | | |
| | í 1 | Auto-fallback/fall-forward enabled |
|------+-------+---------------------------------------------|
| 7 | 0 | Not Used |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CONNECTION FAILURE CODES |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S86? [cmds] |
|--------------+---------------------------------------------|
| Description: | Reports codes which correspond to the |
| | possible causes of a connection failure |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | Normal hang up |
|--------------+---------------------------------------------|
| 4 | Carrier signal lost |
|--------------+---------------------------------------------|
| 5 | No error-control detected for remote modem |
| | during feature negotiation |
|--------------+---------------------------------------------|
| 9 | No common protocol found |
|--------------+---------------------------------------------|
| 12 | No failure - remote modem disconnected |
| | normally |
|--------------+---------------------------------------------|
| 13 | Remote modem failed to respond after 10 |
| | re-transmissions same message |
|--------------+---------------------------------------------|
| 14 | Violation of negotiated protocol caused |
| | failure |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DCE LINE SPEED |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S37=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the maximum allowable data exchange |
| | rate attempted during handshake process. |
| | For compatibility only, use +MS to set line |
| | speed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERROR CORRECTION/COMPRESSION |
|------------------------------------------------------------|
| Type: | Register |
|------------------------------------------------------------|
| Format: | AT [cmds] S46=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects active error correction and |
| | compression protocols |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S46=136 | Error correction only, no compression |
|---------------+--------------------------------------------|
| S46=138 | Error correction with V.42bis data |
| | compression |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FEATURE NEGOTIATION |
|------------------------------------------------------------|
| Type: | Register |
|------------------------------------------------------------|
| Format: | AT [cmds] S48=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects active error correction and |
| | compression protocols. See S36, error |
| | correction negotiation table |
|------------------------------------------------------------|
| Command | Function |
|-----------------+------------------------------------------|
| S48=0 | Detection negotiation disabled |
|-----------------+------------------------------------------|
| S48=7 | Detection negotiation enabled |
|-----------------+------------------------------------------|
| S48=128 | Fall-back to options set in S36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S39? [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays the current flow control |
|--------------+---------------------------------------------|
| Value | Meaning |
|--------------+---------------------------------------------|
| 0 | Flow control disabled |
|--------------+---------------------------------------------|
| í 3 | RTS/CTS flow control enabled |
|--------------+---------------------------------------------|
| 4 | XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| 5 | Transparent XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| 6 | Both RTS/CTS & XON/XOFF flow control |
| | enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TEST MODES |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format: | AT [cmds] S16=n [cmds] |
|--------------+---------------------------------------------|
| Range: | 0-125 |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Controls loopback tests, analog, digital, |
| | remote digital, and self tests. |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | 0 | Local analog loopback not in progress |
| | | |
| | 1 | Local analog loopback in progress |
|------+-------+---------------------------------------------|
| 1 | 0 | Not used |
|------+-------+---------------------------------------------|
| 2 | 0 | Local digital loopback not in progress |
| | | |
| | 1 | Local digital loopback in progress |
|------+-------+---------------------------------------------|
| 3 | 0 | Modem not in remote digital loopback |
| | | |
| | 1 | Remote digital loopback in progress |
|------+-------+---------------------------------------------|
| 4 | 0 | Remote digital loopback not requested |
| | | |
| | 1 | Remote digital loopback requested |
|------+-------+---------------------------------------------|
| 5 | 0 | Remote digital loopback w/ self-test not in |
| | | progress |
| | 1 | |
| | | Remote digital loopback w/ self-test in |
| | | progress |
|------+-------+---------------------------------------------|
| 6-7 | 0 | Not used |
+------------------------------------------------------------+