MultiModemDSVD User Guide

4 AT Commands, S-Registers, and Result Codes

 

 

 

; Return to command mode after dialing. (Place at end of dial

 

 

string.)

 

 

! Hook flash. Causes the modem to go on-hook for the time

 

 

specified in S29, then off-hook again .

 

 

@ Wait for silence. Causes the modem to wait for 5 seconds of

 

 

silence before processing the next part of the command. If

 

 

silence is not detected within the time set in register S7, the

 

 

modem returns a NO ANSWER or BUSY code.

 

 

^ Toggle data calling tone on or off. Applies only to current

 

 

dialing attempt.

 

 

& Detect credit card “bong” tone. If the tone is not detected

 

 

within the time specified by S7 (US models), the modem

 

 

aborts the rest of the sequence and hangs up. The character

 

 

should follow the phone number and precede the user’s call

 

 

card number, e.g., ATDT1028806127853500&123456789.

Command:

DS=y Dial Stored Telephone Number

Values:

 

n = 0–3

Default:

 

none

Description:

 

Dial a number previously stored in directory number y by the

 

 

&Zy=x command. Example: ATDS=3.

Command:

En

Echo Command Mode Characters

Values:

 

n = 0 or 1

Default:

 

1

 

Description:

E0

Do not echo keyboard input to the terminal.

 

E1

Do echo keyboard input to the terminal.

Command:

Hn

Hook Control

Values:

 

n = 0 or 1

Default:

 

0

 

Description:

H0 Go on-hook (hang up) and terminate any &T test that is in

 

 

progress.

 

H1

Go off-hook (make the phone line busy) and enter command mode.

Command:

In

Information Request

Values:

 

n = 0–6

Default:

 

None

Description:

I0

Display the product code. Example: MT5600DSVD.

 

I1

Calculate the ROM checksum and display the least significant

 

 

byte in decimal format.

 

I2

Calculate the ROM checksum and compare it to the prestored

 

 

checksum, displaying OK if they match, or ERROR if they do not.

 

I3

Display the controller firmware version (F), the basic model (V90),

 

 

the application code (A), and the interface type code (I) in the for-

 

 

mat VF.FFF-V90_AI. The application codes are D for desktop and

 

 

L for low power (PCMCIA). The interface codes are S for serial

 

 

and P for parallel. Example: V2.210-V90_DS

 

I4

Display the OEM-defined identifier string in either binary or

 

 

ASCII format.

 

I5

Display the country code. Example: 022.

 

I6

Display the modem data pump model and internal code version.

 

 

Example: RCV56DPF-PLL L8571A Rev 29.00/29.00.

Multi-Tech Systems, Inc.

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