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

[Michael Jerris]

It is, but again, not very often.

On Friday, August 28, 2015, Ben Langfeld <ben at langfeld.co.uk> wrote:

> On 28 August 2015 at 05:42, Marcin S <ms4esl at gmail.com
> <javascript:_e(%7B%7D,'cvml','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
>> <javascript:_e(%7B%7D,'cvml','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
>>> <javascript:_e(%7B%7D,'cvml','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
>>>> <javascript:_e(%7B%7D,'cvml','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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>>>> consulting at freeswitch.org
>>>> <javascript:_e(%7B%7D,'cvml','consulting at freeswitch.org');>
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> Official FreeSWITCH Sites
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>>>>
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>>>>
>>>
>>>
>>>
>>> --
>>>
>>> *Brian West*
>>> brian at freeswitch.org
>>> <javascript:_e(%7B%7D,'cvml','brian at freeswitch.org');>
>>>
>>>
>>> *Twitter: @FreeSWITCH , @briankwest*
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>>> http://www.freeswitchcookbook.com
>>>
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>>>
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>>> *iNUM:*+883 5100 1420 9001 | *ISN:*410*543 | *Skype:*briankwest
>>>
>>> _________________________________________________________________________
>>> Professional FreeSWITCH Consulting Services:
>>> consulting at freeswitch.org
>>> <javascript:_e(%7B%7D,'cvml','consulting at freeswitch.org');>
>>> http://www.freeswitchsolutions.com
>>>
>>> Official FreeSWITCH Sites
>>> http://www.freeswitch.org
>>> http://confluence.freeswitch.org
>>> http://www.cluecon.com
>>>
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>>>
>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> <javascript:_e(%7B%7D,'cvml','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
>> FreeSWITCH-users at lists.freeswitch.org
>> <javascript:_e(%7B%7D,'cvml','FreeSWITCH-users at lists.freeswitch.org');>
>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>>
>
>
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