Chapter 5 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 33
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.