User's Manual

ADCP-75-132 • Issue 2C • August 2006
Page 38
© 2006, ADC Telecommunications, Inc.
7. Remove the dust caps from the optical fiber connectors and the port 1 optical transceiver.
Note: Leave the dust cap in place on any unused optical transceiver.
8. Clean each connector (follow connector supplier’s recommendations) and then insert the
optical fiber connector pair into DHU optical port 1 (see Figure 20).
9. Place the optical fibers within the cable guides provided on the cable management tray (see
Figure 20) and then dress and secure the fibers at the DHU per standard industry practice.
10. Connect the forward and reverse path optical fibers to the DEU or the DRU as specified
in the instructions provided with that unit.
11. Use the designation card provided (see Figure 20) to indicate the location and name of
the DRU or DEU that is connected to each optical fiber pair. The designation card holder
may be attached to any convenient flat surface such as the DHU cable management tray
12. Repeat steps 1–11 for each remaining optical port.
4.10 DC Power Connections
The DC power interface between the DHU and each DRU is supported by six RJ-45 female
connectors. Each DHU RJ-45 connector provides nominal 48 VDC power for the associated
DRU except when the DRU is powered with an AC/DC converter. A category 3 or 5 twisted
pair cable is used to feed the power from the DHU to the DRU. Use the following procedure
to install the DC power cable and to connect it to the DHU.
1. Obtain the required length of category 3 or 5 twisted pair cable.
2. Route the cable between the DHU and the DRU (unless already routed) and then cut to
required length. Allow sufficient slack for dressing and organizing the cable at the DHU.
Note: The maximum distance for routing power cable is 500 meters (1,641 feet).
3. Terminate each end of the cable with a male RJ-45 connector. Match the wire color to
the connector pin as specified in Table 6.
Caution: The DRU will be damaged if the RJ-45 connector is wired incorrectly.
4. Perform a continuity test to verify that each wire is properly connected to the terminating
RJ-45 connector and check the connector for correct polarity (see diagram in Table 6).
Table 7. RJ-45 Connector Pin Designations
PIN NUMBER WIRE COLOR CONNECTOR PINS
1
2
3
4
5
6
7
8
White/Green
Green
White/Orange
Orange
White/Blue
Blue
White/Brown
Brown
PIN
1
PIN
8
+48 VDC ON PINS 1, 3, 5, AND 7
RETURN ON PINS 2, 4, 6, AND 8
16180-A