Connection between the PBX and a PT:
CAUSE
The T/R is connected to the D1/D2.
SOLUTION
No
Can you dial
an extension?
Use the correct cord (the
inner 2 wires are for T/R and
the outer 2 wires are for
D1/D2)
D1
T
R
D2
D1
T
R
D2
PBX Extension
Connection between the PBX and an SLT:
CAUSE SOLUTION
If a telephone equipped
with an A-A1 relay is
connected to the PBX, set
the A-A1 relay switch of the
telephone to "OFF".
Use the correct cord (the
inner 2 wires are for T/R).
PBX
The T/R is connected to the D1/D2.
D1
T
R
D2
T
R
Extension
Connection between the PBX and an SLT that is polarity-sensitive:
PBX
CAUSE
The "T" is connected to the "R".
SOLUTION
D1
T
R
D2
T
R
Extension
Reverse the connections of
the T/R.
(Continued on the next page.)
Yes
