Hi! I guess the receiving GK should have a policy to accept calls from other GKs. May be it can have a list of GKs from where it will accept calls. GK will not do ARQ/ACF while contacting the other GK as it may not know that it actaully talking to another GK or to an EP. regards, Nagesh. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For help on this mail list, send "HELP ITU-SG16" in a message to listserv@mailbag.intel.com