IP Softphone - Cannot hear me

[c.karasavvas]

Hi,

When using my IP Softphone i can hear other people speaking but they cant hear me. My mic is working fine and the phone is registering okay. I can place and receive calls but people can not hear me.

[maalvi]

Hello Chris,

What is your topology? Are you connecting the phone over internet or VPN? If you are using CME you can issue following commoand to see were the RTP packets reaching to the router.

- show call active voice bri

Also see if router is sending the correct IP address of the computer running SIP phone.

- show voip rtp connection

Thanks

MiA

[nitsinha]

Check whether there is any routing issue. Try pinging the other phone's IP address from your system where the Cisco IP communicator is installed.

Regards

Nitesh

PS:Pl rate helpful posts

[c.karasavvas]

Thank you Nitesh, I will try and get back to you.

[c.karasavvas]

Hi MiA,

When using the phone at work with a direct connection to the company's network it works okay. On the other hand when travelling or working from home i am connecting through VPN and that is when is not working.

Chris

[Robert Thomas]

Opened wireshark on your computer and make sure you are sending RTP packets to the correct destionation IP.

One way audio issues are always networking problems preventing the RTP packets going end to end.

If you confirm packets are been sent, perform the same wireshark test from the remote site and confirm if packets are been received.

If not there's something in the network blocking the traffic.

A firewall, an ACL or routing problems are most common issues.

PD. A ping will only check for a layer 3 connection. If it works something could still be blocking it at layer 4 ( Firewall, ACL ... )

[c.karasavvas]

Thank you Robert. I will ask our network administrator to check that.