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A signalling protocol is a protocol used to identify signaling encapsulation. Signaling is used to identify the state of connection between telephones or VOIP terminals (IP telephone or PCs or VoWLAN units). List of signaling protocols:
- QSIG (Q-Signaling protocol)
- H.225.0
- SIP (Session Initiation Protocol)
- H.323
- H.248
- MGCP (Media Gateway Control Protocol)
- SS7 (Signaling System #7)
- C7
- C5
- DTMF (Dual-Tone Multi-Frequency)
- R1
- R2
- ISDN (Integrated Services Digital Network)
- NBAP (Node B Application Part)
- SCCP (Skinny Call Control Protocol), or 'Skinny' for short
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