Merlin 3070 Service And Maintenance Manual page 77

Wiring between the network
2 .
interface and the control unit is
faulty.
3 . Control unit Line Module is
defective.
4 . Control unit is defective.
TROUBLE ON SEVERAL TELEPHONES
Make sure wiring between network interface
2 .
and control unit is not damaged.
Make sure connectors are plugged in
securely.
Make sure all cords are labeled before
3 .
unplugging them from the line modules.
Unplug the cords from the Line Module, insert
a spare Line Module, and plug the cords into
it. See if the outside line will ring. (If you
don't have a spare Line Module, unplug the
cords from another Line Module and use it as
a spare.)
The pins at the back of the control unit Line
4 .
Module slot may be damaged or bent. If so,
the control unit will probably require repair.
Never reinsert a module in a slot with bent
pins. This could create worse problems,
such as destroying the control unit Power
Module or backplane.
Dialing
B2-5