ITU H.225

H.225 "Call signalling protocols and media stream packetization for packet-based multimedia communication systems" is a VoIP protocol, see VOIPProtocolFamily for an overview.


H.225 was introduced by the ITU-T in 1996?

Protocol dependencies

  • H.225 is independent of the underlying transport protocol

Example traffic

XXX - Add example traffic here (as plain text or Wireshark screenshot).


The H.225 dissector is (fully functional, partially functional, not existing, … whatever the current state is). Message and Message Reason Counters are available, see Statistics->H.225…

Preference Settings

One preference setting exists: Whether to do "reassembly h225 spanning multiple TCP segments or not" this setting is dependent on settings in TCP, Q.931 and TPKT.

Example capture file

SampleCaptures/rtp_example.raw.gz (libpcap) A VoIP sample capture of a H323 call (including H225, H245, RTP and RTCP).

Display Filter

A complete list of H.225 display filter fields can be found in the display filter reference

Show only the H.225 based traffic:


Capture Filter

You cannot directly filter H.225 protocols while capturing.

External links


Imported from on 2020-08-11 23:14:32 UTC