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 * However, ethereal only dissect H.223 when it is transferred over ["TCP"] or ["iax2"].  * However, Ethereal only dissects H.223 when it is transferred over ["TCP"] or ["iax2"].

ITU H.223

H.223 is a multiplexing and framing protocol for multimedia streams over fixed-rate channels. It is used by video phones to send their data over the PSTN.


H.223 was developed by the ITU.

Protocol dependencies

  • Typically, H.223 is the lowest software layer, so depends only on hardware.
  • However, Ethereal only dissects H.223 when it is transferred over ["TCP"] or ["iax2"].

Example traffic

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


The H.223 dissector is partially functional. It currently only dissects H.223 Level 2. Its handling of complex multiplex tables is untested.

Preference Settings

There are no configurable preferences for H.223

Example capture file

  • attachment:SampleCaptures/h223-over-iax.pcap.gz

Display Filter

A complete list of H.223 display filter fields can be found in the [ display filter reference]

  • Show only the H.223 based traffic:


Since post 0.10.12 Ethereal only!

Capture Filter

You cannot filter H.223 while capturing.


H223 (last edited 2008-04-12 17:49:59 by localhost)