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Connection between the central office and the PBX:
CAUSE
CO line is connected to the T2/T1.
SOLUTION
Reconnect the CO line to
the T1/R1 or T2/R2 of the
telephone jack using 2-
conductor wiring.
T2
R1
T1
R2
CO line PBX
CO line is connected to the T2/R1.
PBX
CO line
T2
R1
T1
R2
No
Can you dial
out on a CO
line?
(Continued from the
previous page.)
124 Installation Manual Document Version 2011-10
5.1.2 Connection