It is possible to make this imitation call hunting a little more sophisticated. Consider an InboundCallRoute such as:
Voice Services > SP1 Service > X_InboundCallRoute:
{ph,sp2(12222222222;d=5),sp2(13333333333;d=15)}
A call coming in to sp1 will ring the phone connected to the OBi. Five seconds later the call will be forked to 12222222222. Fifteen seconds later the call will be forked to 13333333333. All three endpoints will now be ringing, the first to answer takes the call. If a second call comes in while the first call is in progress, then the two free endpoints will receive ringing (after any applicable delays) and either may take the second call.
To use the Oleg Method with this example:
Voice Services > SP1 Service > X_InboundCallRoute:
{>1234567:ph,sp2(12222222222;d=5),sp2(13333333333;d=15)}
Where 1234567 = Voice Services > SP1 Service > SIP Credentials > AuthUserName