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# ZOOM TELEPHONICS, INC.
56K EXTERNAL V.34
Card Type Modem, Fax
Chip Set Unidentified
I/O Options Line in (RJ-11), line out (RJ11), DTE
port (25-pin serial connector)
Maximum Modem Rate 56.0Kbps
Maximum Fax Rate 14.4Kbps
Data Modulation Bell 103A/212A, ITU-T V.21, V.22,
Protocol V.22bis,V.23, V.32, V.32bis, V.34,
K56flex
Fax Modulation V.17, V.21, CH2, V.27ter, V.29, V.33
Protocol
Error MNP5, MNP10, V.42, V.42bis
Correction/Compression
Fax Class Class I & II
Data Bus External
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Function | Label | Function | Label |
|------------------------------------------------------------|
| Power jack | CN1 | Line in | CN3 |
|---------------------------------+---------+----------+-----|
| DTE port (25-pin serial | CN2 | Line out | CN4 |
| connector) | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DIAGNOSTIC LED(S) |
|------------------------------------------------------------|
| LED | Color | Status | Condition |
|------+--------------+----------+---------------------------|
| OH | Unidentified | On | Modem is off-hook |
|------+--------------+----------+---------------------------|
| OH | Unidentified | Off | Modem is on-hook |
|------+--------------+----------+---------------------------|
| AA | Unidentified | On | Auto-answer enabled |
|------+--------------+----------+---------------------------|
| AA | Unidentified | Off | Auto-answer disabled |
|------+--------------+----------+---------------------------|
| AA | Unidentified | Blinking | Phone is ringing |
|------+--------------+----------+---------------------------|
| RD | Unidentified | On | Modem is receiving data |
|------+--------------+----------+---------------------------|
| RD | Unidentified | Off | Modem is not receiving |
| | | | data |
|------+--------------+----------+---------------------------|
| TD | Unidentified | On | Modem is transmitting |
| | | | data |
|------+--------------+----------+---------------------------|
| TD | Unidentified | Off | Modem is not transmitting |
| | | | data |
|------+--------------+----------+---------------------------|
| TR | Unidentified | On | DTR signal is high |
|------+--------------+----------+---------------------------|
| TR | Unidentified | Off | DTR signal is low |
|------+--------------+----------+---------------------------|
| CD | Unidentified | On | Carrier signal detected |
|------+--------------+----------+---------------------------|
| CD | Unidentified | Off | Carrier signal not |
| | | | detected |
|------+--------------+----------+---------------------------|
| CS | Unidentified | On | CTS signal is high |
|------+--------------+----------+---------------------------|
| CS | Unidentified | Off | CTS signal is low |
|------+--------------+----------+---------------------------|
| EC | Unidentified | On | Error correction enabled |
|------+--------------+----------+---------------------------|
| EC | Unidentified | Off | Error correction disabled |
|------+--------------+----------+---------------------------|
| DC | Unidentified | On | Data compression enabled |
|------+--------------+----------+---------------------------|
| DC | Unidentified | Off | Data compression disabled |
|------+--------------+----------+---------------------------|
| V.34 | Unidentified | On | Modem not connected in |
| | | | V.34 mode |
|------+--------------+----------+---------------------------|
| V.34 | Unidentified | Off | Modem connected in V.34 |
| | | | mode |
|------+--------------+----------+---------------------------|
| K56 | Unidentified | On | Modem connected at 56Kbps |
|------+--------------+----------+---------------------------|
| K56 | Unidentified | Off | Modem not connected at |
| | | | 56Kbps |
|------+--------------+----------+---------------------------|
| FAX | Unidentified | On | Fax connection has been |
| | | | made to remote fax modem |
|------+--------------+----------+---------------------------|
| FAX | Unidentified | Off | Fax connection has not |
| | | | been made to remote fax |
| | | | modem |
|------+--------------+----------+---------------------------|
| MSG | Unidentified | On | Faxes are waiting |
|------+--------------+----------+---------------------------|
| MSG | Unidentified | Off | Faxes are not waiting |
|------+--------------+----------+---------------------------|
| MR | Unidentified | On | Power is on |
|------+--------------+----------+---------------------------|
| MR | Unidentified | Off | Power is off |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SUPPORTED COMMAND SET |
|------------------------------------------------------------|
| Basic AT Commands |
|------------------------------------------------------------|
| AT, A/ |
|------------------------------------------------------------|
| A, B, E, H, M, O, P, Q, T, V, W, X, Y, Z |
|------------------------------------------------------------|
| &C, &T, &W, &Y, &Z |
|------------------------------------------------------------|
| Extended AT Commands |
|------------------------------------------------------------|
| %C, %L, %Q |
|------------------------------------------------------------|
| \A, \B, \G, \L, \N |
|------------------------------------------------------------|
| -K, -Q |
|------------------------------------------------------------|
| :E |
|------------------------------------------------------------|
| +MS |
|------------------------------------------------------------|
| S Registers |
|------------------------------------------------------------|
| S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, |
| S14, S16, S18, S21, S22, S23, S24 |
|------------------------------------------------------------|
| S25, S26, S27, S28, S29, S31, S32, S33, S38, S40, S41 |
|------------------------------------------------------------|
| |
|------------------------------------------------------------|
| Note: See MHI Help File for full command documentation. |
+------------------------------------------------------------+
PROPRIETARY AT COMMAND SET
+------------------------------------------------------------+
| AUTO-MODE DETECTION |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Nn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables/disbles automatic detection. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| N0 | Auto-mode detection disabled |
|--------------+---------------------------------------------|
| í N1 | Auto-mode detection enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 handshaking or |
| | 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 (0-3) |
|--------------+---------------------------------------------|
| 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& | Waits for bong tone |
|--------------+---------------------------------------------|
| D@ | Wait for Quite 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^ | Calling tone enabled |
|--------------+---------------------------------------------|
| D; | Modem returned to idle state after dialing. |
| | The semicolon can only be placed at the end |
| | of the dial command. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| GUARD TONE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Gn [cmds] |
|--------------+---------------------------------------------|
| Description: | Commands the modem to transmit a guard tone |
| | in V.22/V.22bis |
|------------------------------------------------------------|
| Note: Used primarily for international data |
| transmission |
|------------------------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &G0 | Guard tone disabled |
|--------------+---------------------------------------------|
| &G1 | Guard tone disabled |
|--------------+---------------------------------------------|
| &G2 | 1800Hz guard tone enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PULSE DIALING RATIO |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Pn [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects pulse dial make/break ratio |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í &P0 | 39/61ms at 10pps (North America) |
|--------------+---------------------------------------------|
| &P1 | Not used |
|--------------+---------------------------------------------|
| &P2 | Not used |
|--------------+---------------------------------------------|
| &P3 | Not used |
+------------------------------------------------------------+
+------------------------------------------------------------+
| REPORT INFORMATION |
|------------------------------------------------------------|
| Type: | Immediate |
|--------------+---------------------------------------------|
| Format: | AT [cmds] In [cmds] |
|--------------+---------------------------------------------|
| Description: | Displays information requested |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| I0 | Reports four digit product code |
|--------------+---------------------------------------------|
| I1 | Reports ROM checksum |
|--------------+---------------------------------------------|
| I2 | Tests and reports ROM checksum |
|--------------+---------------------------------------------|
| I3 | Reports firmware revision code |
|--------------+---------------------------------------------|
| I4 | Reports identifier string |
|--------------+---------------------------------------------|
| I5 | Reports country code |
|--------------+---------------------------------------------|
| I6 | Reports data pump chipset revision |
|--------------+---------------------------------------------|
| I98 | Reports modem features description |
|--------------+---------------------------------------------|
| I99 | Reports modem features in hex bitmap |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SPEAKER VOLUME |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] Ln [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls speaker volume |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í L1 | Low volume setting |
|--------------+---------------------------------------------|
| L2 | Medium volume setting |
|--------------+---------------------------------------------|
| L3 | Highest volume setting |
+------------------------------------------------------------+
+------------------------------------------------------------+
| TRANSMIT DATA FLOW CONTROL |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] &Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables TD flow control options |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| &K0 | Flow control disabled |
|--------------+---------------------------------------------|
| í &K3 | RTS/CTS flow control enabled |
|--------------+---------------------------------------------|
| &K4 | XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| &K5 | Transparent XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| &K6 | Hardware and software flow control enabled |
+------------------------------------------------------------+
EXTENDED AT COMMAND SET
+------------------------------------------------------------+
| AUTO-RETRAIN - AUTO-FALLBACK/FALL-FORWARD |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] %En [cmds] |
|--------------+---------------------------------------------|
| Description: | Controls auto-retrain mode and |
| | fallback/fall-forward |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| %E0 | Auto-retrain disabled |
|--------------+---------------------------------------------|
| %E1 | Auto-retrain enabled |
|--------------+---------------------------------------------|
| í %E2 | Auto-fallback/fall-forward enabled |
|--------------+---------------------------------------------|
| %E3 | Auto-retrain and fast hang up enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| BREAK TYPE |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] \Kn [cmds] |
|--------------+---------------------------------------------|
| Description: | Configures action of break signal |
+------------------------------------------------------------+
+---------------------------------------------------------------+
| CONNECT MESSAGE |
|---------------------------------------------------------------|
|Type: |Configuration |
|------------+--------------------------------------------------|
|Format: |AT [cmds] \Vn [cmds] |
|------------+--------------------------------------------------|
|Description:|Enables/disables single line connect message |
|------------+--------------------------------------------------|
| Command | Function |
|------------+--------------------------------------------------|
| \V=0 |Single line connect message disabled |
|------------+--------------------------------------------------|
| \V=1 |Single line connect message enabled. CONNECT <DTE |
| |speed></Modulation></Protocol></Compression></Line|
| |speed> |
+---------------------------------------------------------------+
AT VOICE COMMAND SET
+------------------------------------------------------------+
| DISTINCTIVE RING |
|------------------------------------------------------------|
| Format: | AT [cmds] -SDR=n [cmds] |
|----------------+-------------------------------------------|
| Default: | Unidentified |
|----------------+-------------------------------------------|
| Range: | 0 - 255 |
|----------------+-------------------------------------------|
| Description: | Selects which distinctive ring signals |
| | the modem will respond to. |
|------------------------------------------------------------|
| Bit | Value | Function |
|----------+-------+-----------------------------------------|
| 0 | 0 | Distinctive ring disabled |
|----------+-------+-----------------------------------------|
| 1 | 0 | Do not respond to distinctive ring type |
| | | 1. |
| | 1 | |
| | | Respond to distinctive ring type 1. |
|----------+-------+-----------------------------------------|
| 2 | 0 | Do not respond to distinctive ring type |
| | | 2. |
| | 1 | |
| | | Respond to distinctive ring type 2. |
|----------+-------+-----------------------------------------|
| 3 | 0 | Do not respond to distinctive ring |
| | | types 1 & 2. |
| | 1 | |
| | | Respond to distinctive ring types 1 & |
| | | 2. |
|----------+-------+-----------------------------------------|
| 4 | 0 | Do not respond to distinctive ring type |
| | | 3. |
| | 1 | |
| | | Respond to distinctive ring type 3. |
|----------+-------+-----------------------------------------|
| 5 | 0 | Do not respond to distinctive ring |
| | | types 1 & 3. |
| | 1 | |
| | | Respond to distinctive ring types 1 & |
| | | 3. |
|----------+-------+-----------------------------------------|
| 6 | 0 | Do not respond to distinctive ring |
| | | types 2 & 3. |
| | 1 | |
| | | Respond to distinctive ring types 2 & |
| | | 3. |
|----------+-------+-----------------------------------------|
| 7 | 0 | Do not respond to distinctive ring |
| | | types 1, 2 & 3. |
| | 1 | |
| | | Respond to distinctive ring types 1, 2 |
| | | & 3. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DISTINCTIVE RING |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] $$Rn [cmds] |
|--------------+---------------------------------------------|
| Description: | Enables/disables distinctive ring |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| $$R0 | Distinctive ring disabled |
|--------------+---------------------------------------------|
| $$R1 | Distinctive ring enabled |
+------------------------------------------------------------+
+------------------------------------------------------------+
| MNP10EC |
|------------------------------------------------------------|
| Type: | Configuration |
|--------------+---------------------------------------------|
| Format: | AT [cmds] -SECn, [cmds] |
|--------------+---------------------------------------------|
| Description: | Enable/disable MNP10EC |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| í -SEC0 | MNP10EC disabled |
|--------------+---------------------------------------------|
| -SEC1 | MNP10EC enabled |
+------------------------------------------------------------+
S(status)-REGISTERS
+------------------------------------------------------------+
| BREAK OPTIONS |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S82=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Sets the method for break transmission |
| | during error-control and ASB connections. |
|------------------------------------------------------------|
| Command | Function |
|------------+-----------------------------------------------|
| S82=3 | Expedited signaling, immediately send timed |
| | break |
|------------+-----------------------------------------------|
| S82=7 | Destructive signaling, buffers cleared, |
| | immediately send timed break |
|------------+-----------------------------------------------|
| S82=128 | In-sequence signaling, timed break sent in |
| | sequence with transmitted data |
+------------------------------------------------------------+
+------------------------------------------------------------+
| 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 |
|--------------+---------------------------------------------|
| 6 | Remote modem failed to respond to feature |
| | negotiation |
|--------------+---------------------------------------------|
| 7 | Local modem is asynchronous-only, remote |
| | modem is synchronous-only |
|--------------+---------------------------------------------|
| 8 | No common framing technique found |
|--------------+---------------------------------------------|
| 9 | No common protocol found |
|--------------+---------------------------------------------|
| 10 | Remote modem sent erroneous feature |
| | negotiation message |
|--------------+---------------------------------------------|
| 11 | Remote modem failed to send synchronous |
| | information |
|--------------+---------------------------------------------|
| 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. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S37=0 | Speed of last connection |
|--------------+---------------------------------------------|
| S37=1 | 300bps |
|--------------+---------------------------------------------|
| S37=2 | 300bps |
|--------------+---------------------------------------------|
| S37=3 | 300bps |
|--------------+---------------------------------------------|
| S37=4 | Reserved |
|--------------+---------------------------------------------|
| S37=5 | 1200bps |
|--------------+---------------------------------------------|
| S37=6 | 2400bps |
|--------------+---------------------------------------------|
| S37=7 | 75bps send, 1200bps receive |
|--------------+---------------------------------------------|
| S37=8 | 4800bps |
|--------------+---------------------------------------------|
| S37=9 | 9600bps |
|--------------+---------------------------------------------|
| S37=10 | 12.0Kbps |
|--------------+---------------------------------------------|
| S37=11 | 14.4Kbps |
|--------------+---------------------------------------------|
| S37=12 | 7200bps |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERROR CORRECTION NEGOTIATION |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S36=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects the action of the modem if it fails |
| | to connect with the error-correction |
| | protocol set in &Q. |
|--------------+---------------------------------------------|
| Command | Function |
|--------------+---------------------------------------------|
| S36=0 | Hang up |
|--------------+---------------------------------------------|
| S36=3 | Attempt a buffered connection |
|--------------+---------------------------------------------|
| S36=4 | Attempt a connection at MNP2-4; if that |
| | fails, hang up. |
|--------------+---------------------------------------------|
| S36=7 | Attempt a connection at MNP2-4; if that |
| | fails, attempt a buffered connection. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| ERROR CORRECTION/COMPRESSION |
|------------------------------------------------------------|
| Type: | Register |
|------------------------------------------------------------|
| Format: | AT [cmds] S46=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects active error correction and |
| | compression protocols |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S46=136 | LAP-M only, no compression |
|---------------+--------------------------------------------|
| S46=138 | LAP-M with V.42bis data compression |
+------------------------------------------------------------+
+------------------------------------------------------------+
| EXTENDED RESULT CODES |
|------------------------------------------------------------|
| Type: | Register |
|--------------+---------------------------------------------|
| Format | AT [cmds] S95=n [cmds] |
|--------------+---------------------------------------------|
| Unit: | Bit-mapped |
|--------------+---------------------------------------------|
| Description: | Reports result codes |
|--------------+---------------------------------------------|
| Bit | Value | Function |
|------+-------+---------------------------------------------|
| 0 | 0 | CONNECT result code reports DTE speed. |
| | | |
| | 1 | CONNECT result code reports line speed |
| | | instead DTE speed. |
|------+-------+---------------------------------------------|
| 1 | 0 | Verbose CONNECT result codes display DTE or |
| | | line speed only. |
| | 1 | |
| | | Adds "/ARQ" to all verbose CONNECT result |
| | | codes except "NONE." |
|------+-------+---------------------------------------------|
| 2 | 0 | CARRIER result codes disabled. |
| | | |
| | 1 | CARRIER result codes enabled. |
|------+-------+---------------------------------------------|
| 3 | 0 | PROTOCOL result codes disabled. |
| | | |
| | 1 | PROTOCOL result codes enabled. |
|------+-------+---------------------------------------------|
| 4 | 0 | Reserved |
|------+-------+---------------------------------------------|
| 5 | 0 | COMPRESSION result codes disabled. |
| | | |
| | 1 | COMPRESSION result codes enabled. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| FEATURE NEGOTIATION OPTIONS |
|------------------------------------------------------------|
| Type: | Register |
|------------------------------------------------------------|
| Format: | AT [cmds] S48=n [cmds] |
|--------------+---------------------------------------------|
| Description: | Selects active error correction and |
| | compression protocols |
|------------------------------------------------------------|
| Command | Function |
|---------------+--------------------------------------------|
| S48=0 | Detection negotiation disabled, XID |
| | negotiation disabled |
|---------------+--------------------------------------------|
| S48=7 | Detection negotiation and XID 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 |
|--------------+---------------------------------------------|
| 3 | RTS/CTS flow control enabled |
|--------------+---------------------------------------------|
| 4 | XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| 5 | Transparent XON/XOFF flow control enabled |
|--------------+---------------------------------------------|
| 6 | Hardware and software flow control enabled |
+------------------------------------------------------------+