Events: Q933

Event Structure

What is a BOP event ?...

Q933 decoding

by using Clarinet Event-Editor with a filter ...

Protocol stack

Which protocol specifications to be defined in the current filter ?...

Standards

  • ITU Recommendation Q933 ( + annex A )

Options

Changing the display format in the current filter ?...

Clarinet Event-Editor: Q933 decoding

q933_vs_d23.gif (10532 octets)

Event information

Date:

Date of the event (end of BOP frame) in the format: hh:mm:ss/xxx.y

N

The interface number which identifies the Clarinet-interface connected to the host.

Link type

  • TS: Signalling Link  Transmit direction
  • RS: Signalling Link Receive direction
  • TD: Data Link Transmit direction
  • RD: Data Link Receive direction

Dx

The decoding level as specified in the filter (protocol stack).

Protocol fields

Q922

<PDU type> Ctrl    [nnnn]
Address

Q933

Pro-Id  CallRef  <PDU type>
Ctrl

Q933 Protocol fields

Pro-Id

Protocol discriminator 08h.

CallRef

Call reference in the following format: Ref:(x,yy yy)

x

O (origin) or D (destination).

yy yy

reference number in hexadecimal.

<PDU_type>

Type of message.

Ctrl

Attached IE's are displayed according to the the display mode selected in the filter :
Identified mode IE:(c/xx) len:y >> designation
value
Detailed mode IE:(c/xx) len:y >> designation
octet 3 :
......
octet i : bkl field
              ......
octet j : info
octet n : ......
Data field length = 0 no IE display

c

Codeset.

xx

IE code (octet 1).

y

Length of IE content (from octet 3).

designation

Designation of IE according to the standard.

value

Only with Identified mode, IE content (from octet 3) in hexadecimal.

bkl_field

Only with Detailed mode, every field is displayed with its bit configuration within the relevant octet and its meaning according to the standard.

info

Only with Detailed mode, conveyed information.

Protocol stack applied

q933_vs_stack.gif (7321 octets)

 


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updated:  27-Feb-04