One way audio with Bandwidth.COM siptrunk

[JEelman]

We are using a mitel 3300 with MCD 4.2SP1 we have also tried to used the Mitel Border Gateway(same behavior)

We have a account from Bandwidth.com
 

When we have Music on Hold (MOH) active on the Mitel(Emb or external) we have a problem with the audio streams. When we disable the MOH everything is working perfectly.


The call scenario is as follow

 
1.       We dial +1650-669-8040

2.       The IVR is answer the call, we make a choice in the menu

3.       The IVR is transferring the call, MOH is playing (when MOH is enabled)

4.       Agent is answering

a.       (MOH disabled) the agent gets two way audio

b.       (MOH enabled) there is no audio, in the sip trace we see that we sent a re-invite, bandwidth gives a respone with 100 giving a try, but there is never coming a 200 ok.

Bandwidth.com is not very helpfull
Has anyone seen this before?
Thx
 

[Mitel100]

I am sure it is to do with your SDP options for the SIP Peer, can you post these on the forum?

[brantn]

Yeah it is more than likely an SDP option such as early answer.

[JEelman]

We are using the following SDP options
SDP Options
  Allow Peer To Use Multiple Active M-Lines  - No   
  Allow Using UPDATE For Early Media Renegotiation   -No   
  Avoid Signaling Hold to the Peer   -Yes   
  Enable Mitel Proprietary SDP   -No   
  Force sending SDP in initial Invite message   -Yes   
  Force sending SDP in initial Invite - Early Answer   -No   
  Limit to one Offer/Answer per INVITE   -No   
  NAT Keepalive   -No   
  Prevent the Use of IP Address 0.0.0.0 in SDP Messages   -Yes   
  Renegotiate SDP To Enforce Symmetric Codec   -No   
  Repeat SDP Answer If Duplicate Offer Is Received   -No   
  RTP Packetization Rate Override   -No   
  RTP Packetization Rate   -20ms   
  Special handling of Offers in 2XX responses (INVITE)   -No   
  Suppress Use of SDP Inactive Media Streams   -Yes

[swinstation]

HI
i have your problem too( one way audio) please tell me how did you solve it?

[gpatchev]

Was there ever any resolution on this? I am having the same issue.