[asterisk-users] One way audio on outgoing calls

[Administrator]

Hi Carlos

Le 07/08/2020 à 06:33, Carlos Chavez a écrit :
>     I am having a strange problem with a new provider.  We already 
> have a couple SIP trunks working fine.  We are trying a new provider 
> but we are having one way audio problems with outgoing calls. Incoming 
> calls do have two way audio, only outgoing calls have this problem.  I 
> do not see anything odd with a packet capture and using PJSIP history 
> to check.  The provider says that on outgoing calls the get random 
> characters instead of the media port for RTP.
>
>     We are using Asterisk 16.12.0 with PJSIP.  The server is behind 
> NAT so we have external_media_address and external_signaling_address 
> set to the public IP and all relevant ports are forwarded to the 
> Asterisk server.  The other SIP trunks work fine, only this new 
> provider has a problem and only for outgoing calls.
>
>     An rtp set debug on shows only outgoing packets to the media 
> address but no incoming packets.  Why would there be a difference that 
> makes it work on incoming calls but not on outgoing?

We faced this problem and it was a firewall issue on our side. But if 
you say that your provider doesn't get the RTP, I understand that they 
can't return anything. RTP ports ?

Cheers

-- 
Daniel