[Freeswitch-users] Oneway Audio, can’t send RTP back to UAC

Thu Jul 9 18:12:05 UTC 2020

There is No firewall. Already turned off for the sake of testing. on the
Same machine just turn off FreeSWITCH and started Asterisk, able to hear
audio both ways. Switch back to FreeSWITCH and get one way only. When
capturing RTP I can hear far (Play audio stream in Wireshark) but
FreeSWITCH won’t try to send any RTPs out.

From: Dragos Oancea <dragos at freeswitch.org> <dragos at freeswitch.org>
Reply: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
<freeswitch-users at lists.freeswitch.org>
Date: July 9, 2020 at 22:55:22
To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
<freeswitch-users at lists.freeswitch.org>
Subject:  Re: [Freeswitch-users] Oneway Audio, can’t send RTP back to UAC

PCMU:0 is normal. 0 is the payload type for PCMU.
> Perhaps you have the firewall enabled on the machines themselves ?  Flush
> your iptables rules, just to see if it works.
>
>
>
> On Thu, Jul 9, 2020 at 8:17 PM Muhammad Naseer Bhatti <nbhatti at gmail.com>
> wrote:
>
>>
>> Hi,
>> I can’t seem to be able to figure out why I can’t send RTP to the other
>> side (UAC) of the switch (One way audio?) . I have FreeSWITCH Version
>> 1.10.4-dev git 00113c4 with vanilla config (for testing) on Public IP
>> address and the other switch is also on Public IP on same subnet. I receive
>> call from SippySoft (UAC) and playing delay_echo application. The call flow
>> is
>>
>> SIP UA (NATted) -> SippySwitch (Public IP) - FreSWITCH (Public IP)
>>
>> FreeSWITCH after answering the call says
>>
>> 2020-07-09 21:48:37.902333 [DEBUG] switch_core_media.c:5594 Audio Codec
>> Compare [PCMU:0:8000:40:64000:1]/[PCMA:8:8000:20:64000:1]
>> 2020-07-09 21:48:37.902333 [DEBUG] switch_core_media.c:5594 Audio Codec
>> Compare [PCMU:0:8000:40:64000:1]/[PCMA:8:8000:20:64000:1]
>> 2020-07-09 21:48:37.902333 [DEBUG] switch_core_media.c:5594 Audio Codec
>> Compare [PCMU:0:8000:40:64000:1]/[PCMU:0:8000:20:64000:1]
>> 2020-07-09 21:48:37.902333 [DEBUG] switch_core_media.c:5630 Audio Codec
>> Compare [PCMU:0:8000:20:64000:1] is saved as a near-match
>> 2020-07-09 21:48:37.902333 [DEBUG] switch_core_media.c:5701 Substituting
>> codec PCMU at 40i@8000h at 1c
>> 2020-07-09 21:48:37.902333 [DEBUG] switch_core_media.c:3839 Set Codec
>> sofia/internal/04232152273 at 43.225.99.130 PCMU/8000 40 ms 320 samples
>> 64000 bits 1 channels
>> *2020-07-09 21:48:37.902333 [DEBUG] switch_core_codec.c:111
>> sofia/internal/04232152273 at 43.225.99.130 <04232152273 at 43.225.99.130>
>> Original read codec set to PCMU:0*
>>
>> and then starts delay_echo() app. Isn’t  Original read codec set to
>> PCMU:0 is a bad thing? Perhaps the reason not able to send RTP back?
>>
>> On the other hand, I installed Asterisk 13.34.0, on the same machine,
>> just to prove the point if there is network issue but things work just fine
>> with Asterisk default config. Seem like there is either something not
>> configured (default) in FreeSWITCH and I can’t seem to be able to find
>> either. SDP in Asterisk and FreeSWITCH both seems to be the same.
>>
>> FreeSWITCH SIP Trace is here
>> https://pastebin.freeswitch.org/view/0925119c and console log is here
>> https://pastebin.freeswitch.org/view/69b5f68c
>> Asterisk SIP Trace is here https://pastebin.freeswitch.org/view/f38abc97
>>
>> Appreciate some input to figure out this problem.
>>
>>
>> Thanks,
>> Naseer
>> _________________________________________________________________________
>>
>> The FreeSWITCH project is sponsored by SignalWire https://signalwire.com
>> Enhance your FreeSWITCH install with disruptive priced SMS and PSTN
>> services.
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>>
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>>
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>>
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>
> _________________________________________________________________________
>
> The FreeSWITCH project is sponsored by SignalWire https://signalwire.com
> Enhance your FreeSWITCH install with disruptive priced SMS and PSTN
> services.
> Build your next product on our scalable cloud platform.
>
> Join our online community to chat in real time
> https://signalwire.community
>
> Professional FreeSWITCH Services
> sales at freeswitch.com
> https://freeswitch.com
>
> Official FreeSWITCH Sites
> https://freeswitch.com/oss
> https://freeswitch.org/confluence
> https://cluecon.com
>
> FreeSWITCH-users mailing list
> FreeSWITCH-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> https://freeswitch.com
>
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