Siemens M1 - Manual (Page 54)

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GSM M1 Module, English: A24859-N4000-A100-1-7677 gsm-m1-e.fm
Technical reference section
6.3.96
This command returns the activity status of the GSM module M1. It can be used to in-
terrogate the M1 before requesting action.
AT+CPAS - Phone activity status
AT+CPAS
Command Result
AT+CPAS Displays status
AT+CPAS=? Displays a list of supported stati
AT+CPAS=?
Command AT+CPAS=?
Result Code +CPAS: 0 1 2 3 4 5
0 ready
1 unavailable
2 unknown
3 ringing
4 call in progress
5 asleep