asterisk users - Jul 2005 - Hangups transferring call from Intertel system

I have asterisk FXO module on a TDM400P hooked to an Intertel Single Line 
Card.  I can place Intertel intercom calls to Asterisk (both SIP and 
analog phones) and the reverse, but transfering calls doesn't work.  Here 
what the transfer looks like:

Intertel FXS > Transfer > Asterisk FXO > Asterisk FXS > any
extension

When the call is answered Asterisk hangs up.  Intertel eventually does 
transfer the call successfully after the Hold timeout period.

I have the Zap FXO channel configured to Kewlstart but also tried 
LoopStart to no avail.

Craig
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