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Call states of SPA IP Phones and ATA devices (NewCallState syslog message)

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Sometime, the message mentioning the CallState can be seen in log. No official documentation about the states, following table is based on observations.

 

Messages from "CallControl" subsystem looks like:

 SPA5xx/SPA3xx:  
 [x]CC:NewCallState M/N
 SPA1xx/SPA2xx:  
 NEW_CALL_STATE(), call x: old state = N, new state M 

 

where:

x is the call appearance index and is useful for when development engineering is tracing the call object

M is new call state, N is previous call state

 

Recognized Call States

00 CC_CST_IDLE Idle
06 CC_CST_DIALING off-hook, collecting user input
07 CC_CST_STUNNING STUN query (if STUN server configured and NAT Mapping=yes)
08 CC_CST_CALLING calling
09 CC_CST_PROCEEDING other side ringing (outgoing call)
10 CC_CST_RINGING Ringing (incomming call)
11 CC_CST_INVALID ending (audio channel released, call ending)
12 CC_CST_ANSWERING answering (ringing phone picked up)
13 CC_CST_CONNECTED connected (audio path active)
14 CC_CST_HOLD on hold
15 CC_CST_HOLDING going on hold
16 CC_CST_RESUMING resuming
?? CC_CST_FINDING_HS setup session to DECT handset (SPA232D only)

 

Common sequences:

Call, originating phone: 0->6(->7)->8->9->13->(parties talking)->11->0

Call, answering phone: 0(->7)(->??)->10->12->13->(parties talking)->11->0

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