Digital Fiber Optic Transport - ADC Digivance Installation And Operation Manual

ADCP-75-130 • Issue 3C • August 2006
HPCP

1.4 Digital Fiber Optic Transport

The DHU is connected to each DRU unit over a pair of multi-mode or single-mode
(depending on the type of optical transceiver specified) optical fibers. One fiber is used to
transport the forward path optical signal. The other fiber is used to transport the reverse path
optical signal. Because the optical signal is digital, no adjustments to the optical signal level
are required at the DRU or the DHU as long as the BER is adequate. Either 62.5 or 50 micron
core multi-mode optical fiber; or 9 micron core single-mode optical fiber may be used for the
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© 2006, ADC Telecommunications, Inc.
REMOTE
BTS
RIU
DHU
RF
RF
LOCAL
BTS
DRU
Figure 1. System Overview Functional Block Diagram
DRU
DRU
DEU
DRU
DEU
DRU
DRU
DRU
DRU
DRU
DRU
DRU
16417-B