Hello Maureen and all the others!
Please count on two RADVision's legs for the conference: one for myself and the other for RADVision Ltd. in Israel.
I am attaching our input to the conference call. The paper discusses problems and possible solutions for GK failure in the middle of  managing routed calls.
Best Regards, 
Orit Levin
RADVision Inc.
575 Corporate Drive Suite 420
Mahwah, NJ 07430
Tel: 1 201 529 4300  (230)
Fax: 1 201 529 3516
www.radvision.com
orit@radvision.com