[Asterisk-Users] External channels getting connected

[Dustin Knuttgen]

Greetings,

I am having a funny problem where a user is on the phone with someone
that dialed in. Another call will come in, the first is put on hold, the
second answered. When the call is transferred the two external calls are
connected and can speak with each other. As you might imagine that
causes some surprise and problems.

What is causing this and what can be done about it?

Asterisk 1.0.9
T1-PRI

Thanks