User Manual

ADCP-75-136 • Issue 1 • November 2002
Page 20
© 2002, ADC Telecommunications, Inc.
TX RX
TX RX
TX RX TX RX TX RX TX RX
PORTS 1-6
PORTS
1-6
PORTS 1-6
FIBER PORT
FIBER PORT
HOST
PORT
FORWARD PATH
REVERSE PATH
FORWARD PATH
REVERSE PATH
FORWARD PATH
REVERSE PATH
DIGITAL
REMOTE
UNIT
DIGITAL
REMOTE
UNIT
DIGITAL
HOST
UNIT
DIGITAL
HOST
UNIT
DIGITAL EXPANSION UNIT
BASIC CONFIGURATION WITH DHU AND DRU
BASIC CONFIGURATION WITH DHU, DEU, AND DRU
END-TO-END OPTICAL CONNECTOR/CABLE ASSEMBLY DIAGRAM
16814-A
62.5 MICRON: MAXIMUM LENGTH = 500 METERS
50 MICRON: MAXIMUM LENGTH = 750 METERS
9 MICRON: MAXIMUM LENGTH = 10 KILOMETERS
Figure 11. Digivance ICS Optical Connections
Whenever possible, use conduit or a guideway such as the FiberGuide system to route the optical
fibers between the DHU, the DEU’s, and the DRU’s. Avoid routing optical fibers through ladder
type cable racks or troughs that do not provide sufficient support to limit bending or prevent
accidental damage. Tie-wrapping is not recommended as a means of securing fiber optic cables.
Provide sufficient slack at each unit for connecting each fiber to the required port. Fibers may be
pre-terminated or terminated on-site using field-installable LC type connectors.
3.5 Coaxial Cable Requirements
The DHU interfaces either locally (see Figure 8) or remotely (see Figure 9) with the BTS
through coaxial cable connections. In a local interface with the BTS, coaxial cables are