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Echo LANlink Router Option User Manual Issue 1.0 04 December 1997 Page 15 of 59
2.6.1 MAIN LINK CARRIER LOSS
The local Multiplexer cannot identify a valid synchronisation sequence (FAS,
CRC4 etc) from the remote multiplexer.
2.6.2 D/I CARRIER LOSS
The Multiplexer cannot identify a valid synchronisation sequence (FAS,
CRC4 etc) from the unit attached to the D&I port.
2.6.3 REMOTE ALARM
The unit attached to the D&I port is generating an
alarm
in the framing
information, that is, it is reporting that it has a problem.
2.6.4 Nx64 CHANNEL x CONTROL DISAFFIRMED
One of the channel ports (which is in use) is not providing the multiplexer with
a
true
CONTROL signal. This may mean that the signals have not been
connected at all. Note that unconnected CONTROL inputs will produce a
random
ON or OFF indication. Control inputs from ports that are not
allocated in the timeslot map are ignored.
2.6.5 Nx64 CHANNEL x CLOCK FAIL
One of the data channels cannot synchronise its clock to the global network
clock. This may occur if a channel is set to
external
clock, and either no
clock at all is connected, or the clock that is connected is the wrong rate.
2.6.6 MAIN LINK HIGH BIT ERROR RATE
Shows FAULT if the Bit Error Rate exceeds the threshold set. With an error
free link, this fault will eventually clear when the BER becomes less than the
threshold set.
2.6.7 LOCAL/REMOTE MAP MISMATCH
The configuration in the local unit
does not match
that in the remote unit.
This would almost certainly lead to data errors on some channels.
2.6.8 D/I REMOTE ALARM
The unit attached to the D&I port is generating an
alarm
in the framing
information, that is, it is reporting that it has a problem.