CHAPTER 3 NDA-24296
Page 248
Revision 1.0
PA-8COTBJ
Central Office Trunk
Figure 3-41 Connecting Route Diagram
Table 3-1 Balancing Ne twork and Te rmina l Impedance
Balancing Netwo rk Terminal Impe dance
EIA /TIA 46 4-A
900
CCITT Q. 517
AT&T Echo Tes t
Network
Note: As illustrated above, two circuits (#0, #1) are required for connecting pagi ng equipment.
Cable Connections for Paging Equipment
PBX I n st a llation C a ble MDF
A0
B0
LT Connector
A
B
COT PUBLIC
NETWORK
PBX
COT
-48V
G
FUSE -48V
G
B
A
B1
A1
Insta ll ati on C a bl e MDF
LT Connector
A0
B0
GControl Line
Speech Path
PAGING EQUIPMENT
Cable Connections for a C.O. Line
0.21µF
1 k
350
2.16µF
600
600+2.16µ
900
2.16µF
900
0.05µF
100
800