Siemens M1 - Manual (Page 13)

12
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