Must-Know Port Numbers

July 16, 2010 in Blog, CCIE Voice with 4 Comments

TCP Port Numbers

  • TCP 1720 – H.225 Call Setup / FastStart
  • TCP 2000 – SCCP
  • TCP 2428 – MGCP ISDN PRI Backhaul
  • 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 2748 – CTI/JTAPI
  • UDP 5060 – SIP Trunk
  • UDP 16384 – 32766 (even port numbers) – RTP
  • UDP 16385 – 32767 (odd port numbers) – RTCP

About Matthew Berry: Husband to @ElisabethBerry, father of two awesome boys, amateur theologian, sporadic blogger, coffee snob, Senior UC Engineer @ CDW - My tweets are my own!

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4 Responses to “Must-Know Port Numbers”

  1. Glen cobby July 21, 2010 at 3:28 pm #

    Hi

    The odd\even port numbers are the wrong way round, udp 16384 -32768 with even Port numbers Rtp and odd rtcp.

    Thanks

    Glen

    • Matthew Berry July 21, 2010 at 11:00 pm #

      Thanks for the editing! I corrected the values. The range is actually 16384 – 32767, not 32768. Since the RTCP port is always 1 higher than RTP, the range must end at 32767. Otherwise, you'd have an RTP port 32768 with not corresponding RTCP port.

  2. Sogwaai February 21, 2011 at 7:31 pm #

    JTapi/CTI should use TCP 2748.

  3. Mike O September 15, 2011 at 7:59 am #

    Thanks for the SIP configuration and knowledge.