Hi crs8,
Do you have the following set on your OBI100?
Service Providers > ITSP Profile B > SIP -> ProxyServer:
callcentric.comService Providers > ITSP Profile B > SIP -> RegistrarServer:
callcentric.comService Providers > ITSP Profile B > SIP -> UserAgentDomain:
callcentric.comService Providers > ITSP Profile B > SIP -> OutboundProxy:
callcentric.comAlso, these fields should be filled out with your name, your callcentric number beginning with 1 (e.g. 17775551212), and your password:
Service Providers > ITSP Profile B > General -> Name:
Voice Services > SP2 Service -> AuthUserName:
Voice Services > SP2 Service -> AuthPassword:
If all of this checks out, then we may need to troubleshooting your router.
Please let us know,
pc44