Siemens M1 manual Incorrect characters on screen, GSM module does not dial, Cannot receive fax

Installation / startup

Incorrect characters on screen

• Duplicate characters on screen

Cause:	Your communication program is set to half-duplex or echo.
Remedy:	Enter ATE0 to deactivate command echo in command mode or
	deactivate the echo in the communication program.

• Only the characters from the distant station are incorrect

Cause:	The GSM module’s data format does not match that of the distant sta-
	tion.
Remedy:	Set the parameters in your communication program accordingly (data
	bits, parity, stop bits to 8, N, 1).

GSM module does not dial

Cause:	A cable has been disconnected.
Remedy:	Make sure that all cables are securely connected. Tighten all connecting
	screws.
Cause:	The GSM network does not or does not yet support the fax/data
	modes. The GSM module returns NO CARRIER.
Remedy:	Ask your network operator when these modes will be supported in
	your network.
Cause:	The GSM module has activated barred dialing.
Remedy:	Switch the GSM module off and then on.

Cannot receive fax

Cause:	Some fax programs that support TR-29.2 Class 2 expect the bits of the
	fax code to arrive in an order different from the one defined in the
	SP2388 specification. If the GSM module transmits the fax data bits to
	the computer in the wrong order, the fax program cannot receive whole
	fax pages. For this reason, the GSM module has been equipped with
	the AT+FOPT=n command.
Remedy:	Enter one of the following two commands and then check whether the
	system is functioning correctly: AT+FOPT=1,0 (bit order as specified in
	TR-29.2 Class 2, Draft SP2388); AT+FOPT=1,1 (opposite bit order, fac-
	tory configuration for all countries).
Cause:	The GSM network does not yet support the fax/data modes. The GSM
	module returns NO CARRIER.
Remedy:	Ask your network operator when these services will be supported in
	your network.
Cause:	Your network operator has not released your SIM card for the fax/data
	modes.
Remedy:	Ask your network/service operator to release these features.

13