MICROCOM, INC.
OFFICEPORTE VOICE
Card Type | Modem (asynchronous) |
Chipset | Rockwell |
Maximum Onboard Memory | 32KB RAM |
I/O Options | Microphone, microphone in, speaker out, voice, speakerphone, SVD |
Maximum Data Rate | 33.6Kbps |
Maximum Fax Rate | 14.4Kbps |
Data Modulation | Bell 103A, 212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34 Rockwell V.FC |
Fax Modulation | ITU-T V.17, V.27ter, V.29 |
Error Correction/Compression | MNP5, MNP10EC, V.42, V.42bis |
Fax Class | Class I & II |
Data Bus | Serial |

CONNECTIONS | |||
Function | Label | Function | Label |
Speaker out | CN1 | Serial port | CN5 |
Microphone in | CN2 | DC power in | CN6 |
Telephone line out | CN3 | Microphone | MIC |
Telephone line in | CN4 | Power switch | SW1 |
DIAGNOSTIC LED(S) | |||
LED | Color | Status | Condition |
PWR | Unidentified | On | Power is on |
PWR | Unidentified | Blinking | Modem failed NVRAM, RAM, ROM, or data pump power-up test |
PWR | Unidentified | Off | Power is off |
TR | Unidentified | On | DTR signal is high |
TR | Unidentified | Off | DTR signal is low |
OH | Unidentified | On | Modem is off-hook |
OH | Unidentified | Off | Modem is on-hook |
CD | Unidentified | On | Carrier signal detected |
CD | Unidentified | Off | Carrier signal not detected |
DATA | Unidentified | On | Modem is transmitting or receiving data |
DATA | Unidentified | Off | Modem is not transmitting or receiving data |
SUPPORTED STANDARD COMMANDS |
Basic AT Commands |
+++, A/ |
A, B, E, H, L, M, N, O, P, Q, T, V, W, X, Y, Z |
&C, &D, &F, &G, &K, &Q, &S, &T, &V, &W, &Y, &Z |
Extended AT Commands |
\A, \B, \G, \K, \L, \N, \V |
%C, %L, %Q |
Special AT Commands |
-K, +MS, -Q |
S-Registers |
S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, S14, S16, S18, S21, S22, S23, S25, S27 |
S29, S30, S31, S32, S33, S36, S38, S39, S46, S48, S82, S86, S95, S201 |
Note: See MHI help file for complete information. |
Proprietary 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 enabled; modem disconnects when EQM reaches disconnect threshold. |
BIT-MAPPED REGISTER S40 | ||
Format | AT [cmds] S40=n [cmds] | |
Default: | 105 | |
Range: | 0 - 238 | |
Description: | Controls power level, break handling, MNP10, and MNP block size. | |
Bit | Value | Function |
1, 0 | 00 í 0110 | MNP10 disabled. MNP10 enabled. MNP extended services enabled without indicating MNP on the answer detection phase. |
2 | í 01 | Power level adjustment enabled. Power level adjustment disabled. |
5, 4, 3 | 000 001 010 011 100 í 101 | \K0 set. \K1 set. \K2 set. \K3 set. \K4 set. \K5 set. |
7, 6 | 00 í 0110 11 | MNP block size is 64 characters. MNP block size is 128 characters. MNP block size is 192 characters. MNP block size is 256 characters. |
BIT-MAPPED REGISTER S41 | ||
Format | AT [cmds] S41=n [cmds] | |
Default: | 155 | |
Range: | 0 - 219 | |
Description: | Selects compression, auto-retrain and auto-fallback/fall-forward, modem-to-modem flow control, MNP mode, and low-speed MNP10. | |
Note: | Be aware that bit 6 is out of order. | |
Bit | Value | Function |
1, 0 | 00 01 10 í 11 | Data compression disabled. MNP5 enabled. V.42bis enabled. MNP5 and V.42bis enabled. |
6, 2 | í 0001 10 11 | Auto-retrain disabled. Auto-retrain enabled. Auto-fallback/fall-forward enabled. Auto-retrain enabled; modem disconnects when EQM reaches disconnect threshold. |
3 | í 01 | Modem-to-modem flow control disabled. Modem-to-modem flow control enabled. |
4 | í 01 | MNP stream mode enabled. MNP block mode enabled. |
5 | 0 | Not used. |
7 | 0 í 1 | MNP10 at 2400 and 1200bps disabled. MNP10 at 2400 and 1200bps enabled. |
MNP10 - LINK NEGOTIATION | |
Type: | Register |
Format: | AT [cmds] S28=n [cmds] |
Description: | Sets the speed at which MNP10 link negotiation will occur. |
Command | Function |
í S28=0 | Link will be negotiated at highest possible speed. |
S28=64 | Link will be negotiated at 1200bps. |
S28=128 | Link will be negotiated at 4800bps. |
DIAL | |
Type: | Immediate |
Format: | AT [cmds] D<#>;[cmds] |
Description: | Dials the telephone number indicated according to any modifiers included in the string.1 |
Command | Function |
DL | Re-dial last number. |
DP | Pulse dialing enabled. |
DS=n | Dial stored telephone number n. |
DT | Tone dialing enabled. |
DW | Dialing resumed following dial tone detection. |
D, | Dialing paused for amount of time specified in S8 register. |
D"WXY" | Optional method of denoting telephone numbers. Letters enclosed in quotes are interpreted as numbers according to the system found on a telephone keypad. |
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^ | Disables the calling tone for this call. |
D& | Wait for prompt tone detection function enabled. Waits for prompt tone for amount of time specified by the S7 command. |
D; | Modem returned to idle state after dialing. The semicolon can only be placed at the end of the dial command. |
DISPLAY INFORMATION | |
Type: | Immediate |
Format: | AT [cmds] In [cmds] |
Description: | Displays information requested about the modem. |
Command | Function |
I1 | Performs a checksum on the firmware ROM and displays the result. |
I2 | Performs a checksum on the firmware ROM and displays the result as either OK or ERROR. |
I3 | Displays firmware revision and information. |
I4 | Displays feature bitmap. |
I5 | Displays country code. |
I6 | Displays data pump and CEP model and revision. |
DISTINCTIVE RING | |||||
Format: | AT [cmds] -SDR=n [cmds] | ||||
Default: | Unidentified | ||||
Range: | 0 - 7 | ||||
Description: | Selects which distinctive ring signals the modem will respond to. | ||||
Bit | Value | Function | |||
0 | 0 1 | Do not respond to distinctive ring type 1. Respond to distinctive ring type 1. | |||
1 | 0 1 | Do not respond to distinctive ring type 2. Respond to distinctive ring type 2. | |||
2 | 0 1 | Do not respond to distinctive ring type 3. Respond to distinctive ring type 3. | |||
LINE SPEED | |
Type: | Register |
Format: | AT [cmds] S37=n [cmds] |
Description: | Sets the maximum allowable data exchange rate attempted during the handshaking process. |
Command | Function |
í S37=0 | Attempt to connect at fastest common speed. |
S37=1 | Set speed to 300bps. |
S37=2 | Set speed to 300bps. |
S37=3 | Set speed to 300bps. |
S37=4 | Attempt to connect with V.23. |
S37=5 | Set speed to 1200bps. |
S37=6 | Set speed to 2400bps. |
S37=8 | Set speed to 4800bps. |
S37=9 | Set speed to 9600bps. |
S37=10 | Set speed to 12Kbps. |
S37=11 | Set speed to 14.4Kbps. |
S37=12 | Set speed to 7200bps. |
MODE SELECTION | |
Type: | Immediate |
Format: | AT [cmds] #CLS=n [cmds] |
Description: | Selects which mode the modem will operate in. |
Command | Function |
#CLS=0 | Modem will operate in data mode. |
#CLS=1 | Modem will operate in fax class I mode. |
#CLS=2 | Modem will operate in fax class II mode. |
#CLS=8 | Modem will operate in voice mode. |
MNP10EC MODE | |||
Type: | Configuration | ||
Format: | AT [cmds] -SEC=n[,a] [cmds] | ||
Description: | Selects whether the modem will attempt to use MNP10EC mode during the handshaking sequence. | ||
Command | Function | ||
-SEC=0 | MNP10EC handshaking disabled unless a V.34 connection is attempted via a cellular line. | ||
í -SEC=1,a | Default: | 10 | |
Range: | 0 - 30 | ||
Unit: | -1 dBm | ||
Description: | MNP10EC handshaking enabled and the transmit level is set to a. If the a option is not specified then the transmit level will be set to the default. | ||
PULSE DIALING TYPE | |
Type: | Configuration |
Format: | AT [cmds] *Zn [cmds] |
Description: | Selects the type of pulse dialing the modem will use. |
Command | Function |
í *Z0 | Pulse dialing type 0 used. |
*Z1 | Pulse dialing type 1 used. |
SPEAKERPHONE OPTIONS | |||
Type: | Configuration | ||
Format: | AT [cmds] #SPK=x,y,z [cmds] | ||
Description: | Sets various options for speakerphone functions. | ||
Command | Function | ||
x =0 | Microphone disabled. | ||
x =1 | Microphone enabled. | ||
x =2 | Microphone enabled with maximum gain, speaker disabled. | ||
y | Default: | 5 | |
Range: | 0 - 16 | ||
Unit: | -2 dBm | ||
Description: | Sets the attenuation level for speaker output in voice mode. A value of 16 will mute the speaker. | ||
z =0 | Microphone gain set to 0 dBm. | ||
z =1 | Microphone gain set to 6 dBm. | ||
z =2 | Microphone gain set to 9.5 dBm. | ||
z =3 | Microphone gain set to 12 dBm. | ||
SVD DATA BURST | ||
Type: | Configuration | |
Format: | AT [cmds] -SMC=n [cmds] | |
Description: | Selects whether the modem will increase data throughput when no audio signal is detected during an SVD connection. | |
Command | Function | |
-SMC=0 | Data burst disabled. | |
í -SMC=1 | Data burst enabled. | |
SVD BANDWIDTH | ||
Type: | Configuration | |
Format: | AT [cmds] -SMS=a,b,c,d [cmds] | |
Description: | Selects the throughput levels allowed for SVD mode. | |
Command | Function | |
a=0 | SVD mode disabled. | |
a=2 | SVD mode enabled. | |
í a=3 | Auto-detect correct mode. | |
b,c=4800 | Sets the minimum or maximum combined voice or data speed to 4800bps, respectively. | |
b,c=7200 | Sets the minimum or maximum combined voice or data speed to 7200bps, respectively. | |
b,c=9600 | Sets the minimum or maximum combined voice or data speed to 9600bps, respectively. | |
b,c=12000 | Sets the minimum or maximum combined voice or data speed to 12Kbps, respectively. | |
b,c=14400 | Sets the minimum or maximum combined voice or data speed to 14.4Kbps, respectively. | |
d | Sets the baud rate for ML288 modulation mode. A setting of 0 will cause the modem to auto-detect the correct mode, which is the default. | |
SVD MODULATION | ||
Type: | Configuration | |
Format: | AT [cmds] -SQS=m,n [cmds] | |
Description: | Selects which modulation type the modem will use for SVD mode. | |
Command | Function | |
m=0 | Selects V.61 modulation. | |
m=1 | Selects ML144 modulation. | |
í m=2 | Selects ML288 modulation. | |
n=0 | Modem will not auto-detect the correct modulation. | |
í n=1 | Modem will auto-detect the correct modulation. | |
VOICE DEVICE | |
Type: | Configuration |
Format: | AT [cmds] #VLS=n [cmds] |
Description: | Selects the I/O device for the DSP chip. |
Command | Function |
í #VLS=0 | Telephone line and handset used for voice I/O. |
#VLS=1 | Telephone handset used for voice I/O. |
#VLS=2 | Internal speaker only used for voice I/O. |
#VLS=3 | External microphone only used for voice I/O. |
#VLS=4 | Telephone line and handset used for voice I/O; internal speaker enabled. |
#VLS=6 | Speakerphone used for voice I/O. |
VOICE SAMPLE QUALITY | |
Type: | Configuration |
Format: | AT [cmds] #VBS=n [cmds] |
Description: | Selects the number of bits per sample that the modem records. |
Command | Function |
#VBS=2 | Modem records 2 bits per sample in ADPCM encoding. |
í #VBS=4 | Modem records 4 bits per sample in ADPCM encoding. |
#VBS=8 | Modem records 8 bits per sample in PCM encoding. |
#VBS=16 | Modem records 16 bits per sample in PCM encoding. |
VOICE SAMPLING RATE | |
Type: | Configuration |
Format: | AT [cmds] #VSR=n [cmds] |
Description: | Sets the sampling rate used when recording voice signals. |
Command | Function |
í #VSR=7200 | Selects a sampling rate of 7.2KHz. |
#VSR=11025 | Selects a sampling rate of 11.025KHz in PCM encoding only. |
VOICE VOLUME LEVEL | ||
Type: | Configuration | |
Format: | AT [cmds] #VGT=n [cmds] | |
Description: | Sets the volume level when playing back audio signals. | |
Command | Function | |
#VGT=128 | Low volume setting. | |
í #VGT=129 | Medium volume setting. | |
#VGT=130 | High volume setting. | |
#VGT=131 | Highest volume setting. | |