ASA Phone-Proxy RTP problem with external IP Phone

Unanswered Question
Apr 22nd, 2010


With ASA Phone Proxy setup when my laptop connected with public IP to internet  IP Communicator installed on my laptop successfully register with Cisco Unified communication Manager located in my company and audio calls also working perfectly but problem here is when my laptop got private IP from wireless DSL Router that time IPC successfully register with CUCM and I am able to calls other Phone and also hear ring but when call connected both party not able to here audio.

Show output of ASA phone proxy show that it is trying to establish RTP with IPC physical IP address not with nated IP address.

Internal MTP IP :

External MTP IP:

IPC Internal IP behind DSL Router:

Internal IP Phone:

Media-session: :: client ip

  Lcl RTP conn to tx_pkts 444 rx_pkts 0

Media-session: :: client ip

  Lcl RTP conn to tx_pkts 0 rx_pkts 444

Please help me to resolve this problem



I have this problem too.
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