ISDN user-network interface layer 3 specification for basic call control (Q.931)
XXX - add a brief description of Q.931 history
XXX - Add example traffic here (as plain text or Wireshark screenshot).
The Q.931 dissector is fully functional.
- Whether to reassemble Q.931 messages spanning multiple TCP segments or not. (Default: yes)
- Reassemble segmented Q.931 messages or not. (Default: yes)
Example capture file
XXX - Add a simple example capture file to the SampleCaptures page and link from here. Keep it short, it's also a good idea to gzip it to make it even smaller, as Wireshark can open gzipped files automatically.
A complete list of Q.931 display filter fields can be found in the display filter reference
- Show only the Q.931 based traffic:
You cannot directly filter Q.931 protocols while capturing. However, if you know the TCP port used (see above), you can filter on that one.
Q.931 is specified by ITU in Q.931.