Although shown as a TDMA MSC 2 with a TDMA HLR 3, the TDMA MSC 2 and TDMA HLR 3 can be any type of switching device of a first technology that is capable of routing a call, such as TDMA, GSM, CDMA, UMTS, GPRS, PBX, and any other known or later developed technology capable of routing a call.