SS7
From TBwiki
SS7 is a signaling protocol which is used to set up and tear down phone calls. It also provides support for such functionality as local number portability, Short Messaging Service (SMS), prepaid billing and number translation.
SS7 and TelcoBridges
TelcoBridges provides SS7 support with all of its media gateway, VAS development platform and monitoring devices. SS7 functionality is licensed separately and can be provided at initial purchase or added later on via a software license upgrade.
Systems developed using TelcoBridges hardware can support up to a maximum of 64 point codes. It is worth noting that a single pointcode can be used for 2 or more devices configured as a single system.