We have a DSX 40 in our main office and are using Custopak service to transfer calls to our remote location. How can we transfer calls on the pbx using Custopak? Would we press transfer, then dial 9 (to get out of the pbx) , then flash and dial the phone number? Can we program a hot key on the phone to do the transfer to a phone #? Do we need to program the dsx 40 to work with Custopak (if so which programs and settings)?