The Telecom Protocols

SCTP  is designed to transport PSTN signaling messages over IP networks, but is capable of broader applications. SCTP is a reliable transport protocol operating on top of a connectionless packet network such as IP.   It offers the following services to its users: - Error Free, Non-duplicated transfer of user data. - Data fragmentation. - Optional bundling of multiple user message in one single SCTP packet. - Fault tolerance using the multi-homing. SCTP provide following features: - it is transport layer protocol, like TCP and UDP. - It is unicast protocol communication between 2 endpoint. - It is session oriented protocol. it creates association between the endpoint. Endpoints are identified by the IP address and logical port number. - It provide the multihoming - more than one IP address of one endpoint to provide the multi-path, endpoints are identified by the port number. Only one path (association) can be active at a given time...

SIGTRAN (Signalling Transport) is a set of protocols defined to transport SS7 messages over IP networks. SIGTRAN allows IP networks to inter-worked with the Public switched Telephone Network (PSTN) and vice-versa. The Sigrtan protocol stack based on following components: - A Standard IP stack. - A common signalling transport protocol, that we called as SCTP (stream transmission Protocol) - Adaptation Layer: These are the Adaptation layers for MTP2, MTP3 and ISUP, called M2PA, M2UA, M3UA, and SUA. SIGTRAN Stack :