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A DHU can feed either DRUs or DEUs. Digital Expansion Units can be daisy chained without affecting system performance*. Each DHU and DEU is configurable with up to six single-mode or multi-mode optical transceivers. Because the optical ports are independent of one another, single-mode and multi-mode fiber may be mixed and matched as needed between elements. For example, a host unit may feed five remotes with multi-mode fiber, and feed the sixth remote via single-mode fiber due to distance or to utilize available fiber in a facility. As requirements change and future growth is needed, additional transceivers and DRUs can be ordered and easily installed onsite. This modular approach provides optimum design flexibility, reduces the initial cost of an indoor wireless solution, and delays further investment until it is justified by growth. Likewise, any unused ports may simply be turned off without affecting any part of the system performance. The DHU and DEU are AC powered. The DRUs are CAT3/5 powered. For distances greater than 500 meters, ADC offers a local power supply for remote power. *The number of DEUs that can be daisy chained is limited only by the Noise Figure, which can be calculated using the formula 8 dB + (10 log N). 3w w w . a d c . c o m • + 1 9 5 2 9 3 8 8 0 8 0 • 1 8 0 0 3 6 6 3 8 9 1 InterReach® In-building Coverage Solution 6/08 • 102440AE InterReach ® In-building coverage Solution 800 ESMR, 850 Cellular, 1900 PCS Digital Host Unit The DHU provides the input interface for RF signals from a base transceiver station (BTS), or a bi-directional amplifier (BDA). The DHU converts the RF signal into a digital format and distributes the digitized signal over fiber to multiple output ports, either Digital Expansion Units or Digital Remote Units. The DHU also performs power and alarming functions for the system. Alarms are accessible via dry contact closures. The DHU also has alarm status LEDs. The DHU is typically wall- or rack-mounted in a basement or other point of entry within a building requiring coverage. Digital Expansion Unit The DEU is used when more than six remotes are required to serve a building. The DEU receives the digitized signals from the DHU and distributes them over fiber to multiple digital outputs. These outputs can be Digital Remote Units or additional Digital Expansion Units. The DEU has alarm LED indicators. The DEU is typically wall- or rack-mounted in a wiring closet within the building requiring coverage. Digital Remote Unit The DRU receives the digitized signals from the DHU or intermediate DEU, converts the signals back into RF, and interfaces with the antennas to amplify the RF signals throughout the building. The Digital Remote Unit is a compact module that is typically mounted above ceiling tile. Total Solution Support ADC offers turnkey EF&I services for in-building applications and can provision all ancillary equipment needed to support various applications. In addition, the company can provide infrastructure such as fiber, CAT5, connectors, and patch panels. From its skilled wireless systems engineering staff to its Professional Services, ADC supports in-building wireless applications end-to-end from system design through optimization and post-sale support. 4w w w . a d c . c o m • + 1 9 5 2 9 3 8 8 0 8 0 • 1 8 0 0 3 6 6 3 8 9 1 6/08 • 102440AE InterReach ® In-building coverage Solution InterReach® In-building Coverage Solution 800 ESMR, 850 Cellular, 1900 PCS InterReach ICS Configurations The InterReach ICS is flexible enough to fit almost any size indoor application. Small Facility Installation BTS/Off Air Interface DRU DRU DRU DRU DRU DRU Digital Host Unit Large Facility Installation BTS/Off Air Interface DRUDRUDRUDRUDRUDigital Host Unit DRUDRUDRUDRUDRUDigital Expansion Unit DRUDRUDRUDRUDRUDigital Expansion Unit DRUDRUDRUDRUDRUDigital Expansion Unit DRUDRUDRUDRUDRUDRUDigital Expansion Unit 5w w w . a d c . c o m • + 1 9 5 2 9 3 8 8 0 8 0 • 1 8 0 0 3 6 6 3 8 9 1 InterReace® In-building Coverage Solution 800 ESMR, 850 Cellular, 1900 PCS Multiple Fiber Types InterReach ICS accommodates any combination of single-mode and multi-mode fibers between elements host, expansion, and remote units. 6/08 • 102440AE InterReach ® In-building coverage Solution BTS/Off Air Interface Multimode FiberSinglemode Fiber SM SM MM MM RURURURUHost Unit RURURURURURUExpansion Unit RURURURURURUExpansion Unit Growth Free Space Optics (FSO) Installation Only digital transport can utilize free space optics for building-to-building links where fiber is either not available or cannot be deployed in a timely or cost-effective manner. Free space optics distances are determined by service level availability, but are typically in the range of 500 meters to 1 kilometer. Wave Division Multiplexing (WDM) InterReach ICS typically is transported over dedicated strands of fiber (a pair of fiber for transmit and receive paths.) Because of the digital transport, ICS can utilize WDM technology, essentially com...

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