User's Manual

ADCP-75-110 • Issue 2B • July 2001
Page 20
© 2001, ADC Telecommunications, Inc.
2.4 Optical Options and Requirements
Each DHU and its associated DEUs and DRUs are connected over a pair of fiber optic links.
One link transports the forward path optical signal and the other link transports the reverse
path optical signal. Either 50 or 62.5 micron core multi-mode fiber optic cable may be used
for the optical link. If 50 micron cable is used, the optical link may be up to 750 meters (2461
ft) in length. If 62.5 micron cable is used, the optical link may be up to 500 meters (1,641 ft)
in length. A diagram of the optical connections is shown in Figure 11.
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
Figure 11. Digivance ICS Optical Connections