06-24-2009 05:34 AM - edited 03-18-2019 10:25 AM
Hello everybody,
I deploy a VoiP system based on Call Manager Express to link branch to central site.
I have a problem with a conversation :
When I call the branch, I receive and understand correctly the speaker but he doesn't. After debbugging, I see that I lost on the CME the RTP packets.
And He can't call me !!
Have you some idea ??
Thanks
06-24-2009 12:01 PM
Are you using VPN / ADSL ? If so, remember that there is no QoS on the Internet. Your only remedy is upgrade the connection.
06-24-2009 12:18 PM
Hi, for one-way audio please check these points:
â¢Verify bidirectional IP connectivity (usually ping)
â¢Verify configuration parameters on H.323 gateways. Configure h323-gateway voip bind srcaddr ip address on the interface you are using for signaling.
Be sure the voice rtp send-recv command is configured on the gateway.
â¢Check for NAT or firewall restrictions. Be sure that a firewall (if exist) is not blocking RTP traffic.
For
And He can't call me !!
Verify your dial-peer voice voip configuration that is pointing to the correct device gateway/callmanager.
All the best
David
06-24-2009 10:31 PM
In a first time, to answer at p.bevilacqua I not using VPN or ADSL, I work on the ISDN network between the branch but I don't think it's this.
In second time, to david-lima:
. Ping works fine.
. I put the different command and I will give you the news !!!
thanks
06-24-2009 11:34 PM
Hi, ISDN with one B-channel doest have enough BW for G.711. Either use G.729, or two B channels.
Either way, ISDN is far from ideal for VoIP.
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