The SIGTRAN Stacks implements the full power of SS7 Application Programming Interface's (API's) allowing unlimited user applications to seamlessly communicate between the legacy and Next Generation Networks (NGN). It provides a client signaling stack in an IP-based Next Generation Network element that enables it to communicate over IP network using SIGTRAN defined architecture.
With the SIGTRAN stack, consumers are free to choose from several of the defined SIGTRAN protocol layers. Each layer has its own unique characteristics that make it applicable to a given situation.
For each, the SS7 stack is substituted at one of its well-defined layers with a packet transport replacement. By moving up to higher layers higher in the stack, more of the legacy SS7 concepts can be eliminated and replaced with flexible packet and IP protocol routing capabilities. Because SIGTRAN is an industry standard, it allows customers to interoperate in a multi-vendor environment.
The key components in the SIGTRAN achitecture are as follows:
- MGC–Media Gateway Controller, responsible for mediating call control (between the SG and MG) and controlling access from the IP world to/from the PSTN.
- SG–Signaling Gateway, responsible for interfacing to the SS7 network and passing signaling messages to the IP nodes.
- MG–Media Gateway, responsible for packetization of voice traffic and transmitting the traffic towards the destination.
- IP SCP – an IP-enabled Service Control Point (SCP). This exists wholly within the IP network, but is addressable from the SS7 network.
- IP Phone–generically referred to as a “terminal.”
Sigtran Architecture
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