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2.5 Connecting Extensions
Installation Manual 59
2.5 Connecting Extensions
2.5.1 Connecting Extensions
Extension jacks can be used for proprietary telephones (PTs), Direct Station Selection (DSS)
Consoles, single line telephones (SLTs), and Voice Processing Systems.
Note
Connect a display-equipped PT to extension jack 01, as this extension is automatically
designated as the manager extension.
Connection
Insert the modular plugs of the telephone line cords (2- or 4-conductor wiring) into the modular jacks
on the PBX.
Maximum Cabling Distance of Extension Wiring (Twisted Cable)
To extensions
THRL
H: High
T: Tip
R: Ring
L: Low
TEL Jack for Extension
Cable Max. Distance
ø 0.4 mm: 140 m
ø 0.5 mm: 229 m
ø 0.65 mm: 360 m
CAT 5: 229 m
Cable Max. Distance
ø 0.4 mm: 698 m
ø 0.5 mm: 1128 m
ø 0.65 mm: 1798 m
CAT 5: 1128 m
PT and DSS
Console
SLT