Signaling Transport (SIGTRAN) protocol family
Transport of packet-based PSTN signaling over IP Networks.
For interworking with PSTN, IP networks will need to transport signaling such as Q.931 or SS7 ISUP messages between IP nodes such as a Signaling Gateway and Media Gateway Controller or Media Gateway.
See the IETF's working group sigtran-charter.
RUDP: Reliable UDP, the predecessor to SCTP. Only an (expired) Internet Draft, though a version of it is still used by Cisco.
SCTP: Stream Control Transmission Protocol, RFC2960
SCTP has PPID's (Payload Protocol IDentifiers, see IANA's list) for the following protocols:
M2UA: Signaling System 7 (SS7) Message Transfer Part (MTP)2 - User Adaptation Layer RFC3331
M2PA: Signaling System 7 (SS7) Message Transfer Part 2 (MTP2) - User Peer-to-Peer Adaptation Layer (M2PA) RFC4165
M3UA: Signaling System 7 (SS7) Message Transfer Part (MTP)3 - User Adaptation Layer (M3UA) RFC4666
IUA: ISDN Q.921-User Adaptation Layer RFC4233
SUA: Signalling Connection Control Part User Adaptation Layer (SUA) RFC3868
V5UA: V5.2-User Adaption Layer (V5UA) RFC3807
BICC: Bearer Independent Call Control
DUA: Digital Private Network Signaling System (DPNSS)/Digital Access Signaling System 2 (DASS 2)
Extensions to the IUA Protocol RFC4129
Which in turn can carry:
ISDN: Integrated Services Digital Network
Q.921: ISDN Q.921-User Adaptation Layer RFC 3057
Q.931: ISDN user-network interface layer 3 specification for basic call control
ISUP: ISDN User Part
MTP3: Message Transfer Part Level 3
SCCP: Signalling Connection Control Part