Section 363-718-100
Revision 01
Page 3
4.04
PairGain will continue to repair faulty modules
beyond the warranty program at a nominal
charge. contact your PairGain sales representative for
details and pricing.
B. FUNCTIONAL DESCRIPTION
5. OPERATIONAL CAPABILITIES
5.01
The COT shelf mounts in standard 19” or 23”
central office frames and requires four
standard vertical mounting spaces. The shelf accepts
any of the following plug-in units:
•
Line Units
•
Alarm Unit
•
Channel Units
5.02
Each shelf can support two Subscriber Carrier
systems; each system requires one Line Unit
and one Channel Unit. Each shelf can contain up to
two Line Units (one per system), 12 Channel Units
(six per system) and one Alarm Unit (common to both
systems). The COT is powered from -48 V dc CO
battery.
6. BACKPLANE CONNECTIONS
6.01
The backplane of the FCS-718 COT Shelf
(Figure 2) contains the following connectors:
•
CO Power (Table 1)
•
Local Area Network (Table 2)
•
Data (Table 3)
•
HDSL, Test, and Miscellaneous (Table 4)
•
Alarm (Table 5)
•
Subscriber Line (Tables 6 through 9)
•
PGTC Test Interface (Table 10)
6.02
Tables 1 through 10 identify each connector
by type and list the function of each connector
terminal.
TABLE 1. COT SHELF CONNECTORS
(CO POWER)
Connector
Type
Function
TB1 -48V
Screw
CO battery (-48 V dc)
TB2 GND
Screw
CO ground
FRAME
GROUND
Screw
Frame ground
Note: CO ground is separate from frame
ground in PG-Flex. These can be
connected on the COT shelf Backplane
by connecting the “FRAME GND” wire-
wrap post to the adjacent “CKT GND”
wire-wrap post.
TABLE 2. COT SHELF CONNECTORS (LAN)
Connector
Type
Function
J21
BNC
(Not currently used)
TABLE 3. COT SHELF CONNECTOR (DATA)
Connector
Type
Function
J18
DB-25F
(Not currently used)
