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Siemens M1 User Manual

Page 13

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gsm-m1-e.fm

GSM M1 Module, English: A24859-N4000-A100-1-7677

Installation / startup

26.2.96

A number of factors can prevent connection setup.

• No SIM card in the module.

• The PIN or another block is not unblocked.

• The GSM data module is not registered, i.e. it has not or has not yet been able to

register in the network.

• The M1 was manually set to an unavailable network operator by means of

+COPS=1.

• The M1 was signed off of the network by means of +COPS=2.

• Invalid characters in the dial string.

• Dial string contains more than 30 characters.

• Command line contains more than 39 characters.

• A connection is already set up.

• The call is not answered within 60 seconds after dialing because the distant station:

– is not ready,
– is not a modem,
– does not support the selected operating mode.
The GSM module returns

NO CARRIER

.

• The distant station is busy. The GSM module returns

BUSY

.

• Before the connection can be set up, the GSM module receives a signal from the

computer and returns

NO CARRIER

. If no connection is set up, the GSM module

goes on-hook and returns to command mode.

• The GSM network does not or does not yet support the fax/data modes. The GSM

module returns

NO CARRIER

.

• The GSM module is not registered in the GSM network. It returns

NO DIALTONE

.

• You have manually dialed a forbidden network operator; the radio modem no longer

registers.

Connection cannot be set up

Own errors

System errors