I took detailed packet captures to the ITSP on to\from the ITP phone. There is no logical reason why it sends the (RTP) payload on 1 call and not on the next. The problem has to be related to the ITP\SIP phones on v4.60b. Last night I hooked them to local LAN with 7030 and same problem. So, the VPN isn't a variable. I reviewed the v4.65 tech note and it seems to address some erratic ITP behavior. My next step is to upgrade software to v4.65. Anybody having any problems with v4.65? Probably going to wait a while on v4.70.

Old Network Guy and New Phone Guy, CLI=MMC?