Dear thawonpra!
I think you need more 2 analog trunk to do.
Step 1: 22-02 Config main port incomming call is VRS ( all call will go here )
Step 2: 25-02 Config talkie type in this port is VRS Message. Additinal Data is 1 ( VRS Message 1 need talk : " Please press 1 for call to my cellphone )
Step 3: 25-06 ( Attendant Message 1) in line digit 1, Destination number will "9+ your cell phone number".
Acctualy must active Trunk acces code is 9.
Good luck!
AnhTuan
[email protected]Ho Chi Minh city,VietNam