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28.8K EXTERNAL V.34

ZOOM TELEPHONICS, INC.

28.8K EXTERNAL V.34

Card Type

Modem, Fax

Chip Set

Unidentified

I/O Options

Line in (RJ-11), line out (RJ-11), DTE (25-pin serial connector)

Maximum Modem Rate

28.8Kbps

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

Fax Modulation Protocol

V.17, V.21, CH2, V.27ter, V.29, V.33

Error Correction/Compression

MNP5, MNP10, V.42, V.42bis

Fax Class

Class I & II

Data Bus

External

CONNECTIONS

Function

Label

Function

Label

Power jack

CN1

Line in

CN3

DTE connector (25-pin serial connector)

CN2

Line out

CN4

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

14.4

Unidentified

On

Modem connected at 14.4Kbps

14.4

Unidentified

Off

Modem not connected at 14.4Kbps

V.34

Unidentified

On

Modem not connected in V.34 mode

V.34

Unidentified

Off

Modem connected in V.34 mode

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

MR

Unidentified

Blinking

Modem is in self-test mode

SUPPORTED COMMAND SET

Basic AT Commands

AT, A/

A, B, E, H, M, O, P, T, V, W, Z

&C, &K, &M, &T, &V, &W, &Y, &Z

Extended AT Commands

%C, %L, %Q

\A, \B, \G, \L, \N

)M

*H

-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

í &D0

Modem does not respond to DTR

&D1

Modem goes to command mode after DTR goes is off

&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

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@

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 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

SELECT CALL PROGRESS RESULT CODES

Type:

Configuration

Format:

AT [cmds] Xn [cmds]

Description:

Enables selection of tone detection and associated result code format options

Command

Function

X0

Sends OK, CONNECT, RING, NO CARRIER, ERROR, and NO ANSWER

X1

Sends OK, CONNECT, RING, NO CARRIER, ERROR, NO ANSWER, and

CONNECT speed

X2

Sends OK, CONNECT, RING, NO CARRIER, ERROR, NO ANSWER, CONNECT speed and NO DIALTONE

X3

Sends OK, CONNECT, RING, NO CARRIER, ERROR, NO ANSWER, CONNECT speed and BUSY

í X4

Sends all responses

SPEAKER VOLUME

Type:

Configuration

Format:

AT [cmds] Ln [cmds]

Description:

Controls speaker volume

Command

Function

L0

Low volume setting

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

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

%E2

Auto-fallback/fall-forward enabled

%E3

Auto-retrain and fast hang up enabled

TRANSMISSION LEVEL - CELLULAR

Type:

Configuration

Format:

AT [cmds] @Mn [cmds]

Range:

11-31

Unit:

-1 dBm

Description:

Sets the signal level for transmission over cellular communications

Command

Function

í @M0

-26 dBm

@M1

-30 dBm

@M2-@M10

-10 dBm

@M11

-11 dBm

@M12

-12 dBm

@M30

-30 dBm

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/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

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.

EXTENDED RESULT CODES

Type:

Register

Format

AT [cmds] S95=n [cmds]

Unit:

Bit-mapped

Description:

Reports result codes

Bit

Value

Function

0

0

1

CONNECT result code reports DTE speed.

CONNECT result code reports line speed instead DTE speed.

1

0

1

Verbose CONNECT result codes display DTE or line speed only.

Adds "/ARQ" to all verbose CONNECT result codes except "NONE."

2

0

1

CARRIER result codes disabled.

CARRIER result codes enabled.

3

0

1

PROTOCOL result codes disabled.

PROTOCOL result codes enabled.

4

0

Reserved

5

0

1

COMPRESSION result codes disabled.

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