Currently the industry is focused on the efforts of the IETF SIGTRAN Working Group that addresses switched circuit
network (SCN) signaling, with an emphasis on SS7 over IP.
Protocols under development by the IETF
SIGTRAN Working Group include:
- M2PA (MTP 2
Peer-to-peer Adaptation Layer) - Enables SS7 links replacement over IP.
- M2UA (MTP 2
User Adaptation Layer) - Enables SS7 back-hauling from remote end-points over IP.
- M3UA (MTP 3
User Adaptation Layer) - Enables SS7 User Parts (e.g. ISUP and SCCP) to run over
IP.
- SCTP (Streams
Control Transmission Protocol) - Provides generic transport for SCN signaling.
- SUA (SCCP User
Adaptation Layer) - Enables SS7 Application Parts (e.g. TCAP) to run over IP.