I'm not a fan of the OBiTALK Web Portal and prefer to do all configuration to the OBi directly. It's much quicker, easier, and more reliable.
If you configure the OBi directly, you must disable Auto Provisioning:
System Management -> Auto Provisioning -> ITSP Provisioning -> Method : Disabled
System Management -> Auto Provisioning -> OBiTALK Provisioning -> Method : Disabled
To configure Callcentric on SP2:
Service Providers -> ITSP Profile B -> General -> Name : Callcentric
Service Providers -> ITSP Profile B -> General -> DigitMap:
(*123|**275*xx.|[2-9]11|1xxxxxxxxxx|<1>[2-9]xxxxxxxxx|<1aaa>[2-9]xxxxxx|011xx.|(Mipd)|[^*#]@@.'@'@@.)
where aaa is your local area code.
Service Providers -> ITSP Profile B -> SIP -> ProxyServer :
callcentric.comService Providers -> ITSP Profile B -> SIP -> OutboundProxy :
callcentric.comVoice Services -> SP2 Service -> X_ServProvProfile : B
Voice Services -> SP2 Service -> AuthUserName : 1777nnnnnnn
Voice Services -> SP2 Service -> AuthPassword : (sip password)
Voice Services -> SP2 Service -> CallerIDName : (callerid name)
Voice Services -> SP2 Service -> MWIEnable : (checked)
Voice Services -> SP2 Service -> X_VMWIEnable : (checked)
Voice Services -> SP2 Service -> MessageWaiting : (unchecked) (Default unchecked)
For 911 routing to SP2:
Physical Interfaces -> PHONE Port -> OutboundCallRoute:
{([1-9]x?*(Mpli)):pp},
{(<#:>):li},{911:sp2},{**0:aa},{***:aa2},{(<**1:>(Msp1)):sp1},
{(<**2:>(Msp2)):sp2},{(<**8:>(Mli)):li},{(<**9:>(Mpp)):pp},{(Mpli):pli}