General; Description; Figure 1. Qdfr Front Panel; Figure 2. Qdfr Rear Panel - ADTRAN QDFR Unit Installation And Maintenance Practice

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.
QDFR
1181307L7
CH SELECT LBK

Figure 1. QDFR Front Panel

BATTERY
DS1 DS1 DS1 DS1
FIBER
4 3 2 1
TX RX
CRAFT
OPTICS
Complies with 21CFR, SubchapterJ,
Parts 1010 and 1040.
ADTRAN, Huntsville Al. 35814 USA
24V-48V

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.
61181307L7-5E 1