...because we can't all be on the bleeding edge...





COMSTAR 33600 SVD

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.