Siemens MC35 - Manual (Page 203)

AT Command Set
MC35_ATC_01_V03.02 Page 203 of 228 13.03.2002
8.36 AT^STCD Display Total Call Duration
Test command
AT^STCD=?
Response
OK
Execute command
AT^STCD
Response
TA returns total call duration (accumulated duration of all calls)
^STCD: <time> OK
Parameter
<time> string type value; format is "hh:mm:ss", where characters indicate
hours, minutes, seconds; E.g. 22:10:00 “22:10:00"
max value is 9999:59:59
Reference
Siemens
Note
The Total Call Duration will not be reset by power off or other means.