Protocols & Ports

• Signaling

• • Session Initiation Protocol (SIP) : TCP/UDP 5060,5061
  • Session Description Protocol (SDP) : Encapsulated in SIP
  • Media Gateway Control Protocol (MGCP) : UDP 2427,2727
  • Skinny Client Control Protocol (SCCP/Skinny) : TCP 2000,2001
  • Real-time Transfer Control Protocol (RTCP) : (S)RTP+1

• Media

• • Real-time Transfer Protocol (RTP) : Dynamic
  • Secure Real-time Transfer Protocol (SRTP) : Dynamic

• Hybrid

• • Inter-Asterisk eXchange v.1 (IAX): UDP 5036 (obsolete)
  • Inter-Asterisk eXchange v.2 (IAX2) : UDP 4569