Natively supported VOIP protocols:
- SIP, Session initiation protocol
- IAX, IAX2 – Inter Asterisk Exchange protocol (open-source trunking protocol primarily used by Asterisk)
- MGCP: Media gateway control protocol, IETF – see Megaco
- OpenH323)
There are third-party addons that greatly enhance this list, for example alternative H.323 channels, SCCP/Skinny but also for example OSP.
See also
- Asterisk | FAQ | Tips & Tricks