[Asterisk-Users] Zap to SIP transfer problem

[Barton Hodges]

I'm having a problem with transferring a call that comes in a Zap
channel and is connected with a SIP channel (on a GS HT-286).

The call is answered automatically, then the user enters an extension.
Dial() is called with both T and t flags.  When the bridge is made
between the channels, the caller on the Zap channel can hit '#' to
transfer, but the caller on the SIP channel cannot.  No messages
whatsoever are displayed on the console when the SIP user hits any
keys.  What am I missing?