User's Manual Part 1

ADCP-75-187 • Preliminary Issue 1B • November 2005 • Section 1: OVERVIEW
Page 1-9
© 2005, ADC Telecommunications, Inc.
4 DUAL-BAND REMOTE UNIT SCS SYSTEMS
Sections 1 through 3 described the functions and features of a typical SCS system equipped with
one HU and the single-band RU. Each single-band RU is equipped with the electronics to
support one frequency band. If it is necessary so support two frequency bands (such as 800/900
MHz SMR and 1900 MHz) at the same remote location, a dual-band RU can be deployed. A
dual-band RU provides the electronic and optical functionality of two single-band RU’s except
that all the electronic and optical components are housed within a single enclosure.
A dual-band SCS system consists of two standard host units and a dual-band RU that are linked
together over two optical fibers. At the hub site, each HU is connected to a separate EBTS
facility. The dual-band RU supports the frequency bands (such as 800/900 MHz SMR and 1900
MHz) associated with the two connected HU’s. Each HU and the corresponding RU electronics
function independently of each other and may be managed separately using the same element
manager system (EMS). Figure 1-9 shows a typical SCS system equipped with a dual-band RU.
One fiber is used to transport the forward/reverse path optical signals for one SCS system. The
other fiber is used to transport the forward/reverse path optical signals for the other SCS system.