Installation
36
Installation Manual
2.4
Connection
2.4.1
ISDN CO Line Connection
Wire Specifications
In making a line connection, use an ISDN (BRI) CO line cord for installation. The wire
specifications for CO lines are as follows:
Connection
The system has a basic capacity of 2 ISDN (BRI) lines (ISDN (BRI) ports 1 and 2). Each ISDN
(BRI) line can support 2 CO lines. ISDN port 1 is only used for CO lines. ISDN port 2 and 3
(option) can be used for CO lines or ISDN extension lines (default: Port 2 — CO/Port 3 —
Extension). To use ISDN extension lines, some System Programming and hardware changes
are required beforehand.
A: To make 4 CO lines
1.
Insert the modular plugs of the ISDN (BRI) line cords (8-conductor wiring) into the ISDN
(BRI) ports 1 and 2.
2.
Connect the line cords to the terminal board or the modular jacks from the Central Office.
Wire
Diameter of conductor
Diameter of insulation
Solid wire
ø 0.4 mm — ø 0.65 mm
ø 0.66 mm — ø 1.05 mm
To Terminal Board or
Modular Jacks from
the Central Office
ISDN (BRI)
Port 1
ISDN (BRI)
Port 2
ISDN (BRI)
Port 3
View of TEL Jack for CO Line
TA RA RB TB
