SOUTH MOUNTAIN TELECOMMUNICATIONS
SM-5743
Card Type | Fax, Modem (asynchronous) |
Chip Set | Unidentified |
Maximum Modem Rate | 14.4Kbps |
Maximum Fax Rate | 14.4Kbps |
Data Bus | 8-bit ISA |
Fax Class | Class I & II |
Data Modulation Protocol | Bell 103A/212A ITU-T V.21,V.22, V.22bis, V.32, V.32bis |
Fax Modulation Protocol | ITU-T V.17, V.21 ch2, V.27ter, V.29 |
Error Correction/Compression | MNP2-5, V.42, V.42bis |
Boot ROM | Not available |

CONNECTIONS | ||||||
Function | Label | Function | Label | |||
Line in | CN1 | Line out | CN2 | |||
SERIAL PORT ADDRESS | ||
Setting | SW1/1 | SW1/2 |
í COM1 (3F8h) | On | On |
COM2 (2F8h) | Off | On |
COM3 (3E8h) | On | Off |
COM4 (2E8h) | Off | Off |
INTERRUPT | ||
Setting | SW1/3 | SW1/4 |
2 | On | Off |
3 | Off | On |
í 4 | On | On |
5 | Off | Off |
Proprietary AT Command Set
SUPPORTED STANDARD COMMANDS |
Basic AT Commands |
+++, ‘comma’, A/ |
A, D, H, L, M, N, O, Q, V, W, X, Z |
&D, &F, &G, &J, &K, &V, &W, &Y, &Z |
Extended AT Commands |
\A, \B, \G, \K, \V, \X, %A, %C, %E, %L, %Q |
S-Registers |
S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S18, S25, S26, S46, S48 |
Note: See MHI documentation for complete information. |
UNIDENTIFIED COMMANDS | |
Command | Default |
S37 | 0 |
S42 | 0 |
COMMUNICATION PROTOCOLS | |
Type: | Configuration |
Format: | AT [cmds] Bn [cmds] |
Description: | Selects the communication protocol for data calls |
Note: The B command allows the simultaneous selection of more than one suffix, enabling multiple protocols. | |
Command | Protocol |
B0 | ITU-T V.22 at 1200bps |
í B1 | Bell 212A at 1200bps |
B2 | V.23- originate mode receive at 1200bps, send at 75bps; answer mode receive at 75bps, send at 1200bps |
B3 | V.23- originate mode receive at 75bps, send at 1200bps; answer mode receive at 1200bps, send at 75bps |
CONNECT MODE | ||
Type: | Immediate | |
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\N4 | Auto-reliable mode enabled | |
DISPLAY INFORMATION | |
Type: | Immediate |
Format: | AT [cmds] In [cmds] |
Description: | Displays information requested about the modem. |
Command | Function |
I0 | Displays product identification code. |
I1 | Displays ROM checksum. |
I3 | Displays firmware revision. |
I4 | Displays product features. |
INACTIVITY TIMER | |
Type: | Register |
Format | AT [cmds] S30=n [cmds] |
Default: | 0 |
Range: | 0-90 |
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. |
V.32 - AUTO-RETRAIN | |
Type: | Configuration |
Format: | AT [cmds] &Bn [cmds] |
Description: | Controls auto-retrain function if poor line quality is detected |
Command | Function |
&B0 | Auto-retrain disabled modem hangs-up |
í &B1 | Auto-retrain enabled if line quality is poor |
&B2 | No hang-up, no auto-retrain |