19
Echo 2 Mbps Multiplexer
TECHNICAL: 0118 931 2233
The conditions which cause the alarm to operate may be selected from the
System
Alarms
menu page (shown below). Each of the possible Alarm conditions may be set to any
of the following actions:
a)
NO ACTION The events will not cause the relay contacts to operate, or the
event to be logged.
b)
LOG ONLY The events will not cause the relay contacts to operate, but the
event
will be logged
.
c)
MINOR
The event will be logged, and will cause the MINOR alarm
LED to illuminate, and the MINOR alarm relay contacts to operate.
d)
MAJOR
The event will be logged, and will cause the MAJOR alarm
LED to illuminate, and the MAJOR alarm relay contacts to operate.
Note that the screen display also indicates the highest active alarm status (None, Minor or
MAJOR), to the right of the 'Alarm' page prompt on the top right of the screen.
The reasons for which an alarm may be reported as 'FAULT' are identified below:
Link Carrier Loss
The local Multiplexer cannot identify a valid synchronisation sequence (FAS, CRC4
etc) from the remote multiplexer.
2 MEGABIT E1 MULTIPLEXER V1.01
=============================== 11:47 06/01/97 ==================================
Main Link (EUR)
: SYNCHRONISED
Mode
: NORMAL Nx64 Channels : 4
Framing
: CRC4 D&I Channels : 1
Idle Bandwidth
: 0K
* System Alarms : Minor
Clock Reference
: INTERNAL Statistics : Main Link
Configuration
: >LOCAL Events : Log
Event
Action Status
Link Carrier Loss :
MAJOR OK
Timeslot Mismatch : MAJOR OK
D&I Carrier Loss :
MINOR FAULT
D&I Remote Alarm : MINOR OK
Nx64 Control Off :
NO ACTION OK
Nx64 Clock Fail :
LOG ONLY OK
Remote Alarm :
MAJOR OK
Link BER High :
MINOR OK BER Threshold : 1E-8
Cursor Keys to move, CTRL-U to save, ESC to abandon
=================================================================================
Use <SPACEBAR>/<+>/<-> to select
