Must-Know voip port numbers

TCP Port Numbers

• TCP 1720 – H.225 Call Setup / FastStart
• TCP 2000 – SCCP
• TCP 2428 – MGCP ISDN PRI Backhaul
• TCP 2748 – CTI/JTAPI
• TCP 5060 – SIP Telephone
• TCP 11000-11999 – H.245 Capabilities Exchange / SlowStart

UDP Port Numbers

• UDP 1718 – H.225 RAS Multicast Gatekeeper Discovery
• UDP 1719 – H.225 Gatekeeper RAS Messages
• UDP 2427 – MGCP Control
• UDP 5060 – SIP Trunk
• UDP 16384 – 32766 (even port numbers) – RTP
• UDP 16385 – 32767 (odd port numbers) – RTCP