13
Wiring Internal Lines (Extensions)
At most installations for extension wiring, the modular jacks as shown in the diagram will not be
present by the extension “Terminal Block.”
As with the wiring of the CO lines, you may add the modular jacks and RJ-11’s or wire directly
from the system to the terminal block for the extensions. With the wiring of extensions, you
will need cable and connections for 4 conductor (two pair) line cords for key telephones and
connections for 2 conductor (single pair) line cords for all other phone types.
G
B
R
Y
G
B
R
Y
G
B
R
Y
G
B
R
Y
W/B
B/W
W/O
O/W
(EXT’S
00-07)
W/B
B/W
W/O
O/W
W/B
B/W
W/O
O/W
(EXT’S
08-15)
W/B
B/W
W/O
O/W
EXT TERMINATOR BLOCK
(EXT)
4-CONDUCTOR LINE CORDS FOR KEY TELEPHONES,
OTHERWISE, USE 2-CONDUCTOR CORDS
EXT 15
EXT 08
EXT 07
EXT 00
WALL JACKS
WALL JACKS
(G) Green
White/Blue (W/B)
(R) Red
Blue/White (B/W)
(B) Black
White/Orange (W/O)
(Y)
Yellow Orange/White
(O/W)
Color Code Connections
Installing Your Phone System Unit
Chapter
2
- Installation Guide
