Complete Protocol dictionary, glossary and reference
C7: Common Channel Signaling 7
Common Channel Signaling 7 (CCS7 or C7), also known as Signaling System #7 (SS7), is a telecommunications protocol suite defined by the ITU-T which is used by the telephone companies for interoffice signalling SS7 uses out of band or common-channel signalling (CCS) techniques. SS7/C7 uses a separated packet-switched network for the signalling purpose. SS7 is known as C7 outside North America.