[Freeswitch-users] Getting multicast paging to work

Varsha Agarwal vagarwal at vertical.com
Wed Jan 20 22:02:21 MSK 2016

Working pbx shows G.729 in wireshark, here is what I see on the working pbx
1235	2016-01-19 13:05:56.024053000	UDP	294	Source port: 16468  Destination port: 8000
1236	2016-01-19 13:05:56.024089000	RTP	74	PT=ITU-T G.729, SSRC=0xD2ECCEA9, Seq=10, Time=2880
1237	2016-01-19 13:05:56.030450000	RTP	74	PT=ITU-T G.729, SSRC=0x4BF0F35E, Seq=6, Time=1280
1238	2016-01-19 13:05:56.050338000	RTP	74	PT=ITU-T G.729, SSRC=0x4BF0F35E, Seq=7, Time=1440
1239	2016-01-19 13:05:56.055168000	UDP	294	Source port: 16468  Destination port: 8000

It is different on FreeSwitch
1140	36.313847000	UDP	214	Source port: 28080  Destination port: irdmi
1141	36.313946000	UDP	388	Source port: snap  Destination port: commplex-link
1142	36.326208000	RTP	214	PT=ITU-T G.711 PCMU, SSRC=0x24A22162, Seq=16, Time=2880
1143	36.331901000	UDP	214	Source port: 28080  Destination port: irdmi

How do I change codec settings?

-----Original Message-----
From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Bote Man
Sent: Tuesday, January 19, 2016 11:14 PM
To: 'FreeSWITCH Users Help'
Subject: Re: [Freeswitch-users] Getting multicast paging to work

If it is possible to capture both the FreeSWITCH multicast stream and the working PBX multicast stream and compare them, I suspect that you will discover the difference.

"The packets sent are *always* converted to G.711 mu-Law / PCMU (8khz) because some phones (Snom for example) won't accept other codecs via multicast", so if your phones are looking for something else that could account for it.

Hope this helps.


FreeSWITCH Docs Janitor

> -----Original Message-----
> From: Varsha Agarwal
> Sent: Tuesday, 19 January, 2016 01:18
> Subject: Re: [Freeswitch-users] Getting multicast paging to work
> Thanks. I will capture this. I wanted to find out if there is 
> something phone/codec specific not set here that is there in the log 
> and I am not catching. Basically in my network there is another PBX 
> setup that is able
to do
> multicast paging but FreeSwitch is not able to. So there is something
> to my Freeswitch setup. I also did not find too much documentation on 
> the ESF module. I am relatively new to the SIP world.

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