Events: MTP Layer 1

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

MTP-L1 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-L1 decoding

ss7_l1_decod.gif (12634 octets)

Event information Date Date of the event (end of MTP-1 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 MTP-1 <MTP-L1 type> <frame counter> <flag counter>    [nnnn]

Data field 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-L1 Protocol fields

<MTP-L1_type>
  • Frame: Valid frame with correct CRC calculation result.
  • Beginning of Idle state (1 permanent).
  • End of Idle state (1 permanent).
  • Abort frame.
  • Crc error: Frame with false CRC calculation result.
<frame_counter> Number of frames associated with the previous event on the same direction.
<flag_counter> If normal frame, the number of flags from the previous MTP-1 event on the same direction.
[nnnn] If normal frame, the number of octets of the information field. The length does not include the 2-octet CRC.

Protocol stack applied

ss7_l1_stack.gif (7281 octets)

 


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updated:  27-Feb-04