Chapter 5 – AT Commands, S-Registers, and Result Codes

Command:

&T

Local Analog Loopback Test

Description:

 

The modem will perform the local analog loopback test if &T1 is selected.

 

 

The test can be run only when in an asynchronous operation in non-error-

 

 

correction mode (normal), e.g., AT&Q6. To terminate the test in progress,

 

 

the escape sequence must be entered first.

Default:

 

None

 

Defined Values:

 

&T0

Terminates test in progress. Clears S16.

 

 

&T1

Initiates local analog loopback, V.54 Loop 3. Sets S16 bit 0. If a

 

 

 

connection exists when this command is issued, the modem hangs

 

 

 

up. The CONNECT XXXX message is displayed upon the start of

 

 

 

the test.

Command:

&Y

Designate a Default Reset Profile

Description:

 

Selects which user profile will be used after a hard reset.

Default:

 

None

 

Defined Values:

 

&Y0

The modem will use profile 0.

 

 

&Y1

The modem will use profile 1.

Result Codes:

 

OK

 

 

 

ERROR if <value> > is1 or if NVRAM is not installed or is not operational.

Command:

&W

Store Current Configuration

Description:

 

Saves the current (active) configuration (profile), including S-Parameters,

 

 

in one of the two user profiles in NVRAM as denoted by the parameter

 

 

value. This command will yield an ERROR message if the NVRAM is not

 

 

installed or is not operational as detected by the NVRAM test.

 

 

The current configuration is comprised of a list of storable parameters

 

 

illustrated in the &V command. These settings are restored to the active

 

 

configuration upon receiving a Z command or at power up (see &Y

 

 

command).

Default:

 

0

 

Defined Values:

 

&W0

Store the current configuration as profile 0.

 

 

&W1

Store the current configuration as profile 1.

Result Codes:

 

OK

 

 

 

Otherwise ERROR

Command &Zn=x

Store Telephone Number

Description:

 

The modem can store up to four telephone numbers and each telephone

 

 

number dial string can contain up to 31 digits. (Requires 256-byte NVRAM

 

 

installed.)

Default:

 

None

 

Defined Values:

 

<string> Dial string from 0 to 31 characters.

Result Codes:

 

OK For <value> =3, and <string> =31 digits.

 

 

ERROR If <value> > 3, <string> > 31 digits, or if NVRAM is not installed or

 

 

is not operational.

Command

%7

Plug and Play Serial Number

Description:

 

Sets and stores eight serial numbers in hex format used for serial Plug and

 

 

Play and for ISA Plug and Play which use the Conexant 11596 Plug and

 

 

Play device. Applicable to Desktop configuration only.

Example:

 

%7<8 hex numbers><same 8 hex numbers>

Result Codes:

 

OK <8 hex numbers><same 8 hex numbers>

 

 

Otherwise ERROR

Report Command:

AT"?

Reports the stored serial number, issue.

Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide

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Multi-Tech Systems MT5600SMI-PL34 manual Command Local Analog Loopback Test, Command Designate a Default Reset Profile