Siemens M1 - Manual (Page 33)

32
gsm-m1-e.fm GSM M1 Module, English: A24859-N4000-A100-1-7677
Technical reference section
26.2.96
This command provides you with the serial number of the GSM module. The serial
number has the GSM format.
Example:
Enter: AT+CGSN
GSM module: IMEI: 445199518750
OK
This command allows you to terminate all calls.
Example:
Enter: AT+CHUP
GSM module: OK
This command allows you to query the reason why the last call was disconnected. The
information returned can be useful if there were problems with connection setup or if
a connection was interrupted.
AT+CGSN - Request product serial number ID
AT+CGSN
Option Result
AT+CGSN Displays the serial number. In GSM, each mobile telephone is
assigned a unique number, known as the IMEI (International Mobile
Equipment Identity).
AT+CHUP - Hangup call
AT+CHUP
Option Result
AT+CHUP Terminate all calls.
AT+CEER - Extended error report
AT+CEER
Option Result
AT+CEER Displays reason last call was disconnected.