[Freeswitch-users] ESL, "181 Call Is Being Forwarded" and voice mail detection

[Marcin S]

Yes, it is not common for all providers to send 181. However, there are
some that do, and I want to receive it in ESL. Is there any possiblity for
this?

2015-08-27 15:20 GMT+02:00 Brian West <brian at freeswitch.org>:

> I don't think you will reliably receive a 181 in every case that a call
> goes to voicemail.
>
> On Thu, Aug 27, 2015 at 5:20 AM, Marcin S <ms4esl at gmail.com> wrote:
>
>> Hi,
>>
>> I have a dialer app that uses ESL and freeswitch. I would like to detect
>> when voice mail answers call. For such calls there is a "181 Cal Is Being
>> Forwarded" message in SIP signalization.
>> However, in ESL there is no event fired (maybe beacuse there was 183 and
>> 180 earlier).
>>
>> How can I detect, that there was 181 received?
>>
>> Here is an example sip trace:
>>
>>   1   0.000000 192.168.88.237 -> 89.108.20.42 SIP/SDP Request: INVITE
>> sip:123456789 at 89.108.20.42, with session description
>>   2   0.018028 89.108.20.42 -> 192.168.88.237 SIP Status: 100 Trying
>>   3   0.418550 89.108.20.42 -> 192.168.88.237 SIP/SDP Status: 183 Session
>> Progress, with session description
>>   4   1.405465 89.108.20.42 -> 192.168.88.237 SIP Status: 180 Ringing
>>   5  29.270672 89.108.20.42 -> 192.168.88.237 SIP Status: 181 Call Is
>> Being Forwarded
>>   6  29.659371 89.108.20.42 -> 192.168.88.237 SIP/SDP Status: 200 OK,
>> with session description
>>   7  29.670833 192.168.88.237 -> 89.108.20.42 SIP Request: ACK
>> sip:3c6d5343fb70df3a18f4dd32e7c9d226 at 89.108.20.42:5060;transport=udp
>>   8  70.590778 192.168.88.237 -> 89.108.20.42 SIP Request: BYE
>> sip:3c6d5343fb70df3a18f4dd32e7c9d226 at 89.108.20.42:5060;transport=udp
>>   9  70.625224 89.108.20.42 -> 192.168.88.237 SIP Status: 200 OK
>>
>>
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>
>
>
> --
>
> *Brian West*
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>
>
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