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5 If you have a problem
If you think there’s a problem with your KiloStream private circuit or with
your NTU, please try the checks below: you may be able to solve the
problem.
If a fault proves to be in your terminal equipment or on-site wiring, rather
than in the private circuit, BT reserves the right to charge for time spent on
a visit to your premises: it’s in your interest to carry out these checks first.
Operating guide
9
if you see
the cause is
you should
no lights illuminated
no power to the NTU
switch the power on and check
and a blank LCD
all connections
and
a fault on the circuit
check all connections to the NTU
FAULT light illuminated
and then report the fault to the
relevant Service Centre
and
the TX NRDY button or local
ask the distant end user to check
FAULT and RXD lights
loop has been operated at
illuminated
the distant NTU
and
the distant data terminal
ask the distant end user to check
RX NRDY light illuminated
equipment (DTE) is not
connected
a remote loop has been
ask the distant end user to check
and TM light illuminated
activated at the distant end
and
the TX NRDY button has
deselect the TX NRDY button
TX NRDY and RXD lights
been operated on the local
illuminated
NTU
and
the local DTE is not raising
check with your DTE supplier
RXD light illuminated
a ‘request to send’ signal
S: RECEIVE DATA
S: RECEIVE DATA
S: LOOP ACTIVE
S: NTU NOT READY
S: NTU NOT READY
S: NTU NOT READY