3GPP TS 27.007 version 13.5.0 Release 13
List current calls +CLCC
Command
+CLCC
Possible response(s)
[+CLCC: <ccid1>,<dir>,<stat>,<mode>,<mpty>[,<number>
,<type>[,<alpha>[,<priority>[,<CLI validity>]]]]
[<CR><LF>+CLCC: <ccid2>,<dir>,<stat>,<mode>,<mpty>[,
<number>,<type>[,<alpha>[,<priority>[,<CLI validity>
]]]]
[...]]]
+CME ERROR: <err>
<stat>: integer type (state of the call)
0 active
1 held
2 dialing (MO call)
3 alerting (MO call)
4 incoming (MT call)
5 waiting (MT call)
My interpretation:
0 active: call in progress (setup was successful)
1 held: call on hold
2 dialing (MO call): number dialed
3 alerting (MO call): number dialed and the called party is alerted
4 incoming (MT call): incoming call, ringtone played (AT RING notification)
5 waiting (MT call): call waiting notification while another call is active (if call waiting feature enabled)