Control Protocols
H323 – Complex, multiple flow, ancient
Session Initiation Protocol (SIP)
- New, simple, only sets up RTP streams
Cisco Skinny (Propritary)
- Allows complete phone customization
MGCP (mediatrix Gateway Control Protocol)
- Went the way of AMIGA. Good but Not widely deployed because it was initially close source ?
IAX (Inter-Asterisk eXchange)
- Simple, transverses NAT, Compessed