ZOOM TELEPHONICS, INC.
COMSTAR 33600 SVD
Card Type | Modem (asynchronous) |
Chip Set | Rockwell |
I/O Options | Voice, speakerphone, SVD, speaker out, microphone in |
Maximum Data Rate | 33.6Kbps |
Maximum Fax Rate | 14.4Kbps |
Data Modulation Protocol | Bell 103A/212A ITU-T V.21, V.22, V.22bis, V.23, V.32, V.32bis, V.34 Rockwell V.FC |
Fax Modulation Protocol | ITU-T V.17, V.21CH2, V.27ter, V.29, V.33 |
Fax Class | Class I |
Error Correction/Compression | MNP5, MNP10EC, V.42, V.42bis |
Data Bus | 16-bit ISA |
CONNECTIONS | |||
Function | Label | Function | Label |
Telephone line out | CN1 | Speaker out | CN3 |
Telephone line in | CN2 | Microphone in | CN4 |
USER CONFIGURABLE SETTINGS | ||
Setting | Label | Position |
í Speaker jack is monaural | J16 | Open |
Speaker jack is stereo | J16 | Closed |
í Microphone is electret | J25 | Closed |
Microphone is dynamic | J25 | Open |
AUDIO OUTPUT LEVEL CONFIGURATION | ||
Setting | J6 | J10 |
Lowest | Open | Closed |
Low | Open | Open |
Medium | Closed | Closed |
High | Closed | Open |
SUPPORTED STANDARD COMMANDS |
Basic AT Commands |
+++, ‘comma’, 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, \N, \V |
%C, %E, %L, %Q |
Special AT Commands |
#CID, :E, -K, +MS, -Q |
S-Registers |
S0, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S12, S18, S24, S25, S26, S29, S30, S32, S33, S36 |
S38, S39, S46, S48, S82, S86, S95 |
Note: See MHI documentation for complete information. |
UNIDENTIFIED COMMANDS | |
Command | Default |
\K | Unidentified |
S14 | Unidentified |
S16 | Unidentified |
S21 | Unidentified |
S22 | Unidentified |
S23 | Unidentified |
S27 | Unidentified |
S28 | Unidentified |
S31 | Unidentified |
S40 | Unidentified |
S41 | Unidentified |
Proprietary AT Command Set
DIAL | |
Type: | Immediate |
Format: | AT [cmds] D <#>;[cmds] |
Description: | Dials the telephone number indicated according to any modifiers included in the string. |
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. |
DIAL (CON'T) | |
Command | Function |
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^ | Calling tone enabled 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 CHIPSET MANUFACTURER | |
Type: | Immediate |
Format: | AT [cmds] #MFR? [cmds] |
Description: | Displays the voice chipset manufacturer’s name. |
DISPLAY CHIPSET MODEL NAME | |
Type: | Immediate |
Format: | AT [cmds] #MDL? [cmds] |
Description: | Displays the model name of the modem's voice chipset. |
DISPLAY CHIPSET REVISION | |
Type: | Immediate |
Format: | AT [cmds] #REV? [cmds] |
Description: | Displays the revision level of the modem's voice chipset. |
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. |
I2 | Tests and displays ROM checksum result. |
I3 | Displays firmware revision. |
I4 | Displays modem identifier. |
I5 | Displays country code. |
I6 | Displays data pump modem and revision. |
DISTINCTIVE RING | ||
Type: | Configuration | |
Format: | AT [cmds] $$Rn [cmds] | |
Description: | Selects whether the modem will use the Distinctive Ring function. | |
Command | Function | |
í $$R0 | Distinctive Ring disabled. | |
$$R2 | Distinctive Ring enabled. |
DISTINCTIVE RING TYPES | |||
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=5 | Set speed to 1200bps. |
S37=6 | Set speed to 2400bps. |
S37=7 | Attempt to connect with V.23. |
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 1 mode. |
#CLS=8 | Modem will operate in voice mode. |
MNP10EC MODE | ||
Type: | Configuration | |
Format: | AT [cmds] -SEC=n [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 | MNP10EC handshaking enabled. |
SPEAKERPHONE OPTIONS | |||
Type: | Configuration | ||
Format: | AT [cmds] #SPK=x,y,z [cmds] | ||
Description: | Sets various options for speakerphone functions. | ||
Command | Function | ||
x =0 | Microphone enabled. | ||
x =1 | Microphone disabled. | ||
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 OPTIONS | ||
Type: | Configuration | |
Format: | AT [cmds] $$ASn =xx [cmds] | |
Description: | Selects whether the modem will use SVD mode and selects the line source for it. | |
Command | Function | |
$$ASn =OFF | SVD enabled | |
$$ASn =ON | SVD disabled. | |
n=1 | Telephone handset used for voice I/O with high data throughput. | |
n=2 | Telephone handset used for voice I/O with high voice throughput. | |
n=3 | Telephone line used for voice I/O with high data throughput. | |
n=4 | Telephone line used for voice I/O with high voice throughput. | |
í n=5 | Speakerphone used for voice I/O with high data throughput. | |
n=6 | Speakerphone used for voice I/O with high voice throughput. |
TONE DETECTION | |||||
Format: | AT [cmds] #VTD=x,y,z [cmds] | ||||
Default: | x ,y,z 63 | ||||
Range: | 0 - 63 | ||||
Description: | Sets which tones the tone detection will report. | ||||
Note: | The value of x sets the tone detection modes in voice transmit mode, y sets them in voice receive mode, and z sets them in voice command mode. | ||||
Bit | Value | Function | |||
0 | 0 í 1 | DTMF tones are not detected. DTMF tones are detected. | |||
1 | 0 í 1 | V.25 1300Hz calling tone is not detected. V.25 1300Hz calling tone is detected. | |||
2 | 0 í 1 | T.30 1100Hz fax tone is not detected. T.30 1100Hz fax tone is detected. | |||
3 | 0 í 1 | V.25/T.30 2100Hz answer tone is not detected. V.25/T.30 2100Hz answer tone is detected. | |||
4 | 0 í 1 | Bell 2225Hz answer tone is not detected. Bell 2225Hz answer tone is detected. | |||
5 | 0 í 1 | Call progress tones are not detected. Call progress tones are detected. |
TONE GENERATOR - DIRECT ENTRY | |
Type: | Immediate |
Format: | AT [cmds] #VTS=[m, n, x] |
Range: | m 200-3000, n 200-3000, x 0-255 |
Unit: | m 1 Hz, n 1 Hz, x .1 second |
Description: | Generates a dual-frequency tone for duration x at frequencies m and n. |
TONE GENERATOR - TIMED PHONE KEYS | |
Type: | Immediate |
Format: | AT [cmds] #VTS={a, n} |
Range: | a 0-9, A-D, #, *; n 0-255 |
Unit: | x .1 second |
Description: | Generates the DTMF tone for duration x for the character a. |
TONE GENERATOR - PHONE KEYS | |
Type: | Immediate |
Format: | AT [cmds] #VTS=a |
Range: | 0-9, A-D, #, * |
Description: | Generates the DTMF tones for the characters in the string for the duration set with +VBT. |
TONE GENERATOR LENGTH | |
Format | AT [cmds] #VBT=n [cmds] |
Default: | 10 |
Range: | 0 - 40 |
Unit: | 0.1 second |
Description: | Sets the length of DTMF tones that are generated. |
VOICE DEVICE | |
Type: | Configuration |
Format: | AT [cmds] #VLS=n [cmds] |
Description: | Selects the I/O device for the DSP chip. |
Note: | This modem may not support all options listed below. The #VLS? command will display the available options. |
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=5 | Headset used for voice I/O. |
#VLS=6 | Speakerphone used for voice I/O. |
#VLS=7 | Handset muted by disconnecting handset or speakerphone from telephone line. |
#VLS=8 | Connects caller ID relay for recording of conversation over handset. |
#VLS=9 | Connects handset (or speakerphone) to DSP chip for recording or playback. |
VOICE - DISPLAY BUFFER SIZE | |
Type: | Immediate |
Format: | AT [cmds] #VBQ? [cmds] |
Description: | Displays the size of the voice buffer. |
VOICE - DISPLAY COMPRESSION TYPE | |
Type: | Immediate |
Format: | AT [cmds] #VCI? [cmds] |
Description: | Displays the type of compression currently in use. |
VOICE - LOCAL SERIAL PORT SPEED | |
Type: | Configuration |
Format: | AT [cmds] #BDR=n [cmds] |
Default: | 0 |
Range: | 0 - 48 |
Unit: | 2400bps |
Description: | Sets the speed of the local serial port when in voice mode. A value of 0 indicates that the modem should auto-detect the correct serial port speed. |
VOICE RE-RING DETECT TIME | |
Type: | Configuration |
Format: | AT [cmds] #VRA=n [cmds] |
Default: | 70 |
Range: | 0 -255 |
Unit: | 10 mS |
Description: | Sets the maximum time the modem will wait for the remote station to ring again before it assumes that it has gone off-hook. |
VOICE RECEIVE | |
Type: | Immediate |
Format: | AT [cmds] #VRX |
Description: | Commands the modem to begin receiving voice data. |
VOICE RING DETECT TIME | |
Type: | Configuration |
Format: | AT [cmds] #VRN=n [cmds] |
Default: | 70 |
Range: | 0 - 255 |
Unit: | .1 second |
Description: | Sets the maximum time the modem will wait for the remote station to ring before it assumes that it went off-hook before it rang. |
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. |
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 SILENCE DETECTION | |
Type: | Configuration |
Format: | AT [cmds] #VSD=n [cmds] |
Description: | Selects whether the modem will use silence detection to pause recording during periods of silence. |
Command | Function |
í #VSD=0 | Silence detection disabled. |
#VSD=1 | Silence detection enabled. |
VOICE SILENCE DETECTION TIME | |
Type: | Configuration |
Format: | AT [cmds] #VSP=n [cmds] |
Default: | 55 |
Range: | 0 - 255 |
Unit: | .1 second |
Description: | Sets the minimum amount of silence that the modem will detect. |
VOICE SILENCE DETECTION THRESHOLD | |
Type: | Configuration |
Format: | AT [cmds] #VSS=n [cmds] |
Description: | Sets the threshold of sensitivity that the modem uses to determine silence detection. |
Command | Function |
#VSS=0 | Silence detection disabled. |
#VSS=1 | Minimum silence detection sensitivity. |
#VSS=2 | Standard silence detection sensitivity. |
#VSS=3 | Maximum silence detection sensitivity. |
VOICE TIMING MARK | ||
Type: | Configuration | |
Format: | AT [cmds] #VTM=n [cmds] | |
Description: | Configures timing mark placement. | |
Command | Function | |
í #VTM=0 | Timing marks disabled. | |
#VTM=10 | Timing marks enabled. |
VOICE TRANSMISSION LEVEL | |
Type: | Configuration |
Format: | AT [cmds] #TL=hhhh [cmds] |
Default: | 3FFF |
Range: | 0000 - 7FFF |
Unit: | Unidentified (hexadecimal) |
Description: | Sets the transmission level for sending audio in voice mode. |
VOICE TRANSMIT | |
Type: | Immediate |
Format: | AT [cmds] #VTX |
Description: | Commands the modem to begin transmitting voice data. |
VOICE VOLUME LEVEL | |
Type: | Configuration |
Format: | AT [cmds] #VGT=n [cmds] |
Default: | 153 |
Range: | 128 - 228 |
Unit: | Unidentified |
Description: | Sets the volume level when playing back audio signals. Lower numbers indicate a lower volume level. |