Comdial G0408 - Page 43

Figure 2–5: Detailing The CO Line Interface
RING 2
RING 1
TIP 1
TIP 2
RING 4
RING 3
TIP 3
TIP 4
RING 6
RING 5
TIP 5
TIP 6
RING 8
RING 7
TIP 7
TIP 8
CO/PBX
LINES
Line Terminations
Type 66M-XX
Connector Block
or
Individual 6-Position
Modular jacks
{
{
{
{
(Typical 8-Line, 16-Station
Base Unit Shown)
CAJS083
6-Wire Twisted
Pair Cable
6
5
4
3
2
1
No Conn.
Ring 2
Ring 1
Tip 1
Tip 2
No. Conn.
6
5
4
3
2
1
Aux. Ring
Ring 2
Ring 1
Tip 1
Tip 2
Aux. Tip
Pin designation for
Line Jacks 1 and 2
Pin designation for
Line Jacks 5 and 6
IMI66–107 Digital Telephone System
Installing The DSU 2 – 13