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

[Ben Langfeld]

On 28 August 2015 at 05:42, Marcin S <ms4esl at gmail.com> wrote:

> Yes, it is not common for all providers to send 181. However, there are
> some that do,
>

If this was signalled on the PSTN then I think I might cry with joy.


> 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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>>>
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>>>
>>
>>
>>
>> --
>>
>> *Brian West*
>> brian at freeswitch.org
>>
>>
>> *Twitter: @FreeSWITCH , @briankwest*
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>>
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>>
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>>
>> _________________________________________________________________________
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>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
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>>
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>>
>
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
> FreeSWITCH-users mailing list
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