Mango,
Thank you for the reply, it has caused me to do more research and reading which, while useful, is overwhelming.
One detail to note is I am using Google Voice numbers for SP1 and SP2.
I found a reference that says the parameter you mentioned is ignored in a GV setup. Specifically the text is:
When Google Voice is selected as the protocol, all the other ITSP Profile parameters are ignored except the DigitMap parameter. The following SP1/SP2 Service parameters are also ignored:
- X_Codec_Profile, X_RegisterEnable, X_UserAgentPort, X_SipDebugOption
- X_KeepAliveEnable, X_KeepAliveExpires, X_KeepAliveServer, X_KeepAliveServerPort, X_KeepAliveMsgType
- URI, MaxSessions, X_AcceptDialogSubscription, X_AcceptLinePortStatusSubscription
The source for this is
http://www.obihai.com/OBiDeviceAdminGuide#_Toc367543035