Events: MTP Layer 2

 Event Structure What is a BOP-SS7 event ?...

MTP-L2 decoding by using Clarinet Event-Editor with a filter ...

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

Standards
  • Q703

Options Changing the display conditions in the current filter ?...

Clarinet Event-Editor: MTP-L2 decoding

ss7_l2_decod.gif (11058 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 level of Decoding as specified in the filter (Stack).

Protocol fields MTP-2 <PDU type> Ctrl    [nnnn]
Status

Data field Optional field of the conveyed data, displayed if no upper layer of protocol has to be decoded.
The display format specified in the filter is used.		  

MTP-L2 Protocol fields

 <PDU type> Ctrl Type of frame:
  • FISU
  • LSSU
  • MSU

Ctrl Control field in the format BSN:xx BIB:x FSN:xx FIB:x LI:xx
  BSN:xx Value of the Backward: Sequence Number in hexadecimal mode.
  BIB:x Value of the Backward Indicator Bit (0 or 1).
  FSN:xx Value of the Forward: Sequence Number in hexadecimal mode.
  FIB:x Value of the Forward Indicator Bit bit (0 or 1).
  LI:xx Value of the Length Indicator.

[nnnn] Length of the data field.

Status Optional status indication.

Protocol stack applied

ss7_l2_stack.gif (7215 octets)

 

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updated:  27-Feb-04