Thank you for your help.
Now I can call Callcentric number connected to Obi202 SP4 -> ph1.
As you suggested I use OBi Expert with everything at default and then set:
Service Providers -> ITSP Profile D SIP -> ProxyServer:
callcentric.comVoice Services ->
SP4 Service -> AuthUserName: 1777xxxxxxx
Voice Services ->
SP4 Service -> AuthPassword: callcentric password
Voice Services ->
SP4 Service -> X_ServProvProfile: D
Voice Services -> SP4 Service -> X_RegisterEnable: selected
Voice Services -> SP4 Service -> X_InboundCallRoute: {ph1}Status -> System Status -> SP4 Service Status: Registered (server=204.11.192.170:5060; expire in 30 sec)
It works, but on the Device Configuration - Obi202 -> Service Provider Set-Up -> SP4 is shown as
Not Configured. Is that normal? When I tried to set-up SP4 using Edit Service Provider 4 Settings, the SP4 status was always shown as
Registration is not required.