Timeslot Mismatch; D&I Carrier Loss; D&I Remote Alarm; Nx64 Control Off - Black Box Echo Series User Manual

Echo 2 Mbps Multiplexer

Timeslot 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.
D&I Carrier Loss
The Multiplexer cannot identify a valid synchronisation sequence (FAS, CRC4 etc)
from the unit attached to the D&I port.
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.

Nx64 Control Off

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 un-connected CONTROL inputs will produce a random ON or OFF
indication. Control inputs from ports which are not allocated in the timeslot map are
ignored.

Nx64 Clock Fail

One of the data channel 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 which is connected is the wrong rate.

Remote Alarm

Shows FAULT if a remote Alarm is being received from the remote multiplexer.
Remote alarms are generated by any condition set at the remote site to give a MAJOR
alarm. If you want a particular alarm to be reported through the remote alarm bit, you
must set its Action field to either MAJOR or MINOR.N Any alarm which is set to
MAJOR or MINOR will cause a remote alarm to be sent through the link.
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