Events: ISDN BRI (U)

 Event structure What is ISDN BRI U physical event?

PH decoding Using the Clarinet Event-Editor with an appropriate filter.

Protocol stack Defining a list of protocols used in the current filter.

Standards
  • ITU Recommendation G961
  

Options Changing the display conditions in the current filter.

ISDN BRI U decoding

ph_isdn_bri_u_decod.gif (11282 octets)

 Event information Date Date of the event in the format: hh:mm:ss/xxx.y  
N The interface number which identifies the Clarinet-interface connected to the host.
Link type
  • NT: network termination NT1 ( i.e. user side)
  • LT: line termination ( i.e. network side)

Protocol fields Type 1:
Line_state		 <NT state> <LT state> <source 1> <source 2>

The "»" mark indicates the item which undergoes a state transition.
Type 2:
M4 bits		 NT <NT M4 bit1> <NT M4 bit2> ... <NT M4 bitn>
or LT <LT M4 bit1> <LT M4 bit2>  ... <LT M4 bitl>

The "»" mark indicates the item which undergoes a state transition.

PH-ISDN BRI (U) Protocol fields

<NT state> State of the network termination NT1 ( i.e. user side).

<LT state> State of the line termination LT ( i.e. network side).
<source 1> State of  the phantom power supply.  
<source 2> State of  auxiliary power supply.  
<NT M4 bit> Value of a M4 multiframe bit from the NT1:
  • ACT: Activation bit (set to 1 during activation)
  • PS1, PS2: Power status bits (0 indicates power problems)
  • NTM: NT1 in test mode bit (0 indicates test mode)
  • CS0: Cold-start-only bit (1 indicates cold-start-only)
  • SAI: S-activation indicator bit (optional, set = 1 for S/T activity)
  
<LT M4 bit> Value of a M4 multiframe bit from the LT:
  • ACT: Activation bit (set to 1 during activation)
  • DEA: Deactivation bit (set to 0 to announce deactivation)
  • UOA: DLL-only-bit (optional, set = 1 to activate S/T)
  • AIB: Alarm indication bit (0 indicates interruption)
  

Protocol stack applied

bop_isdn_u_stack.gif (7234 octets)

Native ISDN BRI U event

The ISDN BRI U physical events are generated by the analysis process on the PH link when the physical interface type is based on ISDN BRI U. Every transition of state of the physical interface (NT/LT state, M4 multiframe bits, power supply) generates an event.

The binary event structure is defined in the Clarinet-API.

The edition of the ISDN BRI U physical events without any decoding/formatting enables the successive states of the physical interface to be displayed.

 

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