one way voice ip phone to ip phone

[PRAVEEN KUMAR GVK]

hi

I can hear voice from branch office but my voice can't reaching them. I had two diffierent servers call manager 4.3 and 7.1, but only one server can be in online and second will be stand alone. Branch office was connected through leased line. But using ip communicator voice was both way.

what should be the problem.

                                                                                                 thankq.

[Chad Stachowicz]

It is going to be a problem with your voice subnet routing or security.  Sounds to me like there may be an access list on one of your voice subnets blocking RTP one way.  Could be in any of the switches and or routers / asa's between the devices.

one way audio is almost always this..

An ip communicator would run on your data subnet, which is not likely to have any kind of security ACL's in place, which is why it probably works

If its working to the other hard phone with the ip communicator, then its likely the local voice subnet thats the issues,

Hope this helps,

Chad

[PRAVEEN KUMAR GVK]

Hi   Thanks for your reply b,but i can get ping from both sises

[Marwan ALshawi]

do ping with source interface between the ip phones subnets

if its still ping then check the path as the above poster suggested to chekc if there is any ACL or filtering in the path of RTP stream

[PRAVEEN KUMAR GVK]

hi

there is no acl, vlan.

if the problem is firewall, but initially it was both sides voice

[PRAVEEN KUMAR GVK]

hi

is there any tool to find the data loss or blocking state.

if any please send the link

                                            thanks

[ryabenne · Accepted solution]

Hello,

I would recommend taking a packet capture from the back of the phone and then ripping out the RTP stream and listening to it. Assuming its G.711 you can use the Wireshark tool to listen to it. If its G.729 audio then you might have to open a  TAC case to get it analyzed. This analyzation will give you exactly what is happening from an IP phone perspective and then will guide you on the path that the RTP travels. This path will eventually guide you to the offending device and then you will know where your problem is. This is very handy instead of guessing where the issue is.

That is the quickest and easiest way to work problems like this.

Ryan

[PRAVEEN KUMAR GVK]

hi

if there is voice vlan what should be the configuration can please how to configure 802.1p/q protocol.

i am also using h323 protocol for video call in that also one way voice so please tell me the configuration.

                                                                         thanks