BSS 130 contains a Base Station Controller (BSC) 132 that may be in communication with and in control of a plurality of Base Transceiver Stations (BTSs) 134-138. Each individual BTS 134-138 under the control of a given BSC 132 may define a radio cell operating on a set of radio channels thereby providing service to a Mobile Terminal (MT) 140.
Network system 110 may also include a short message service center (SMSC) 144 adapted to deliver short message service (SMS) messages to mobile terminals. When an SMS message is sent to a user, the SMS message is stored in SMSC 144 which delivers it to the destination mobile terminal when the destination mobile terminal is available. As is known, the SMS message may be delivered via a control channel, e.g., a cell broadcast control channel, or bearer channel.
Network 100 may include an enterprise network 150, such as a switched Ethernet, that interconnects various network nodes via various network infrastructure, such as hubs and switches. In the illustrative example, enterprise network 150 includes various client nodes, such as desktop clients 152 and 153, land-line Internet Protocol (IP) telephones 154-155, and an IP private branch exchange (PBX) 158 which carries calls over IP, e.g., via voice over IP (VoIP). Enterprise network 150 may interface with the PSTN 190 via a router 172 disposed at the enterprise.