Multi-Tech Systems MMCModem GPRS (MTMMC-G) - Manual (Page 104)

Chapter 12 – V.24 and V.25 Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 104
Auto-Tests &T
Description: This command runs various auto-tests.
Values:
0 Perform software auto-tests
The response will be OK if no software problem is detected (EEPROM, RAM, and ROM
checksums); otherwise, a simple ERROR response is sent.
1 Perform the audio loop test (close)
This is used to validate the audio loop (microphone to speaker)
2 Stop the audio loop test (open)
This is used to validate the audio loop (microphone to speaker)
Syntax: Command syntax: AT&T
Command Possible responses
AT&T0
Note: Perform software auto-tests OK
Note: No software problem detected, all checksums are
correct
AT&T1
Note: Do the audio loop test (close) OK
Note: Command valid
AT&T2
Note: Stop the audio loop test (open) OK
Note: Command valid
Echo E
Description: This command is used to determine whether or not the modem echoes characters received by an
external application (DTE).
Values:
0 Characters are not echoed
1 Characters are echoed
Syntax: Command syntax: ATE
Command Possible responses
ATE0
Note: Characters are not echoed OK
Note: Done
ATE1
Note: Characters are echoed OK
Note: Done
Restore Factory Settings &F
Description: This command is used to restore the factory settings from EEPROM.
It only restores the parameters that can be found in the Parameters Storage table with column AT&F
checked. Those parameters are restored in RAM and in E2P, overwriting the profile set with AT&W.
Values:
0 Restore factory settings
Note: No other value is supported.
Syntax: Command syntax: AT&F
Command Possible responses
AT&F
Note: Ask for restoring the factory settings OK
Note: Done
AT&F0
Note: Ask for restoring the factory settings OK
Note: Done