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61181307L7-5E 1
Quad Fiber Remote Unit
GENERAL
This practice is an installation and maintenance guide for the ADTRAN Quad Fiber Remote
(QDFR) unit. The QDFR (P/N 1181307L7) front panel is illustrated in Figure 1. The QDFR rear
panel is illustrated in Figure 2.
Figure 1. QDFR Front Panel
Figure 2. QDFR Rear Panel
Description
The QDFR is a customer premise fiber optic access unit. The QDFR is designed to provide four
T1 interfaces that can be multiplexed together over a single mode fiber optic cable to a Total
Access 3000 Quad Fiber Central Office (QDFC) Module (P/N 1181308L7).
The QDFR is specifically designed to provide a high degree of resistance to damage typically
caused by Ground Potential Rises (GPRs). This is accomplished by having the network
interface optically isolated from the customer side and the DS-1 interfaces having over 6
kilovolts of isolation with respect to ground. The QDFR is virtually immune to the effects of
GPRs compared to other network interface equipment.
QDFR
CH SELECT LBK
1181307L7
OPTICS
DS1 3
DS1 4
DS1 2
DS1 1
LBK
NEND(Y)
FENG(G)
TEST
TERM(R)
MON(G)
CRAFT
BATTERY
FIBER
OPTICS
TX RX
Complies with 21CFR, SubchapterJ,
Parts 1010 and 1040.
ADTRAN, Huntsville Al. 35814 USA
24V-48V
DS1
4
DS1
3
DS1
2
DS1
1