3M Dynatel 955 - Page 63

Operation
Section 1
Page 53
REG
RED to RING
BLACK to TIP
GREEN to GROUND
Hookup:
R
B
G
On
Reset
Turn unit on.
Disregard this step
if the unit is on.
Reg
Listen for dial
tone
Loop extender status
End
of
Test
Loop resistance and
CO resistance
The C.O. Switch type
identifies the
tip-to-ground on-hook
resistance; if there are
unusual line cards,
select ‘unknown’ C.O.
type then enter the
tip-to-ground on-hook
resistance. You can
measure the resistance
in the C.O. directly on
the frame by using the
OHMS key.
Note: On some floating-tip switches such as #5 ESS, ground
resistance cannot be measured as the switch operates on a
floating ground.
OR
OR