Peripheral Equipment cards 45
QPC67 Carrier Maintenance
System Hardware-System option
21/51/61/71
Purpose-Used
for RPE applications. Contains an M-type (3017 Hz) fault-
locate filter. Provides DC detection circuitry for the fault-locate pair, and
carrier loopback relays to facilitate software maintenance testing.
Terminates and gives access to the order wire pair via a jack and binding
posts on the faceplate.
Note:
QPC67E or later vintage is required.
Quantity--One
per RPE Module
QPC71 E&M/DX Signaling and Paging Trunk
System Hardware-All
Purpose-Used in P-Law applications in one of the following ways to
interface with appropriate types of trunk facilities:
-
E&M signaling, 2-way dial repeating trunk
-
2-wire DX signaling, 2-way dial repeating trunk
-
4-wire DX signaling, 2-way dial repeating trunk (a 24V4 repeater,
--
externally mounted, converts the trunk from 2- to 4-wire)
-
paging trunk or externally mounted loudspeaker
Refer to
E8uWDX signaling and paging trunk- Circuit description (553-
2001-187) for more details.
Each card contains two separate, identical trunk circuits. Trunk usage
option is selected by switches on the circuit card.
Note:
QPC7
1F
or later vintage is required.
Quantity-One
per two trunk circuits
Equipment identification and ordering information 553-3001-154
.