Patent ID: 8169952

Claim:
A method comprising: receiving into a cellular radio access network (RAN) a call request seeking to set up a call for a cellular wireless communication device (WCD) that is operating in a wireless coverage area of the RAN, wherein the call is a call to a called party; responsively making a determination of whether the WCD is currently checked-into a cellular-PBX integration service to which the WCD subscribes; if the determination is that the WCD is currently checked-into the cellular-PBX integration service, then setting up the call to an IP PBX server that serves the WCD; and if the determination is that the WCD is not currently checked-into the cellular-PBX integration service, then setting up the call to the called party without setting up the call to the IP PBX server, the method further comprising maintaining a subscriber profile record for the WCD, wherein the subscriber profile record includes an indication of whether the WCD is currently checked-into or checked-out of the cellular-PBX integration service, wherein making the determination of whether the WCD is currently checked-into the cellular-PBX integration service comprises referring to the subscriber profile record to determine whether the WCD is currently checked-into or checked-out of the cellular PBX integration service.