[Freeswitch-users] One-way audio issue with attended transfer

[John Platts]

We have been experiencing a one-way audio issue with attended transfer. The problem is that after an call is transferred through an attended transfer, the caller cannot be heard, but the caller can hear the voice of the person that the call is transferred to.

Steps to reproduce the problem:
1. Dial into FreeSWITCH from an external phone.
2. Answer the call. One-way audio is not experienced here.
3. Press the Transfer button on the IP phone to initiate an attended transfer.
4. Dial the extension that the call is to be transferred to.
5. Allow the extension that the call is to be transferred to pick up the call. One-way audio is not experienced here.
6. Press the Transfer button to complete the transfer. The caller does hear audio from the person that the call is transferred to, but the person that the call is transferred to cannot hear the caller. The one way audio issue is occurring here.

The attended transfer was performed from an extension on one SPA303 phone to an extension on another SPA303 phone. FreeSWITCH actually detects that the transfer is an attended transfer.

Here are attachments that I have uploaded to pastebin:
conf/dialplan/features.xml file: http://pastebin.freeswitch.org/17291
FreeSWITCH log, including the attended transfer: http://pastebin.freeswitch.org/17286

How do we get this one-way audio issue fixed?