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1 Alerting 180 Ringing
2 Progress 183 Callprogress
3 In-band information 183 Call progress
4 Call forward; line busy 181 Call is being forwarded
5 Call forward; no reply 181 Call is being forwarded
6 Call forward; unconditional 181 Call is being
forwarded
7.182 Queued ACM (BCI = no indication)
-(no event code present) 183 Call progress

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Posted by sagitraz

180 Ringing ACM (BCI = subscriber free)
181 Call is being forwarded Early ACM and CPG, event=6
182 Queued ACM (BCI = no indication)
183 Session progress message ACM (BCI = no indication)

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Posted by alaxander