ARI on NodeJS + Moving to Bridge = No sound on one end

Asterisk Asterisk APIs
1

Hi,

I am following the example on: ARI and Bridges: Bridge Operations - Asterisk Project - Asterisk Project Wiki

I used the sample where I transfer the channels from a Holding Bridge to a Mixing Bridge. Everything work, except that one of the channels has no sound (the other is fine).

After some tests, I found out that if I don`t start the Moh, everything works fine.

Can anyone help me? I`m fairly new to the asterisk world.

Thanks

2

You’d need to provide more information. Where is each channel located? What is their configuration? Are they behind NAT? Are you behind NAT? Does calling between them outside of ARI work?

3

Hi @jcolp , thanks for the prompt reply.

I am running it inside a docker container (code here: GitHub - hobojoe/asterisk).

To be able to run it, you just need to change the pjsip.conf “external_media_address”/“external_signaling_address” to your local ip (couldn`t find a way to make it work without this step).

After some additional tests I have found out the following?

  1. If I never enable Moh, everything works.
  2. If I enable recording on the mixing_bridge, everything works (even with the Moh on).

I really have no clue what could be causing this.

I really appreciate any help!

4

Is direct_media set to “no” on each PJSIP endpoint?

5

Yes:

[endpoint-base](!)
type=endpoint
context=default
direct_media=no
disallow=all
allow=ulaw
6

Then you’d need to provide further information such as what I originally asked for, alongside a SIP trace (pjsip set logger on) and RTP trace (rtp set debug on).

You should really start outside of Docker though to eliminate its networking aspect initially.

7

@jcolp Here are the log files you requested:

RTP Trace: RTP trace · GitHub

SIP Trace: SIP Trace · GitHub

I enabled them in separate attempts so the logs wouldn’t be mixed, but both cases represent a failed attempt (where the side that was on the holding bridge cannot hear the other).

8

I would assume Docker is NATting all of the source traffic, so the impact of which on your environment I have no idea. You could try enable rtp_symmetric on the endpointand see what happens otherwise I’m going to bow out of this conversation. Docker just complicates VoIP and adds extra work if you’re starting out.

9

That did the trick! Thanks a lot for your help @jcolp

10

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