If you want to use the OBiTALK Web Portal, the instructions are here :
OBi Expert ConfigurationI find it much simpler and quicker to simply log into the OBi directly at the IP address returned by dialing ***1 and configure it directly. If you use the direct method, you will need to set the following to prevent the OBiTALK Web Portal from overwriting your changes:
System Management -> Auto Provisioning -> ITSP Provisioning -> Method : Disabled
System Management -> Auto Provisioning -> OBiTALK Provisioning -> Method : Disabled
You can forward calls from the LINE Port to the SP1 Service by setting:
Physical Interfaces -> LINE Port -> CallForwardUnconditionalEnable : (checked)
Physical Interfaces -> LINE Port -> CallForwardUnconditionalNumber : SP1(12341234567)
where 12341234567 is the number you wish the calls to be forwarded to using SP1.
If you'd prefer to have incoming calls on the LINE Port ring both the OBi PHONE Port and a number using SP1, set this instead:
Physical Interfaces -> LINE Port -> InboundCallRoute : {ph,sp1(12341234567)}
The first to answer will receive the call.