TTS RTP not streaming to initial speaker

[akei...@gmail.com]

Hi Arsen, 

We enabled UNIMRCP TTS and connection is reachable in Cisco VVB but unfortunately we are facing the below issue. Can you please help us on this to resolve?

1. Unimrcp TTS polly is working fine but when its streaming back to the voice browser the voice is not playing. 
2. Unimrcp is sitting in the AWS Cloud Environment. 
3. And Cisco is residing On Premise in our chennai location. 
4. Sip communications working fine but when the RTP is transmitting to Private IP of VVB(Virtual Voice Browser).
5. RTP streaming is not sending to the Initial Speaker. 

I have attached Pcap file and also the unimrcp log for your reference.

Thanks,

Nadesan G

[Arsen Chaloyan]

Hi Nadesan,

I always recommend installing UniMRCP server on the same LAN with IVR but not vice versa to avoid NAT issues which you seem to encounter.

If I follow the provided network capture right, then your VVB is at 14.98.37.58, which is OK. But why SIP 200 OK sent back in response from UniMRCP server contains the same IP address in SDP (c). This is not the intended behavior. The SDP should contain a public IP address of UniMRCP server seen by VVB, which you are supposed to configure in unimrcpserver.xml as <ext-ip>.

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Arsen Chaloyan
Author of UniMRCP
http://www.unimrcp.org