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Summary of Contents for ADC HiGain HLU-231 LIST 8D
- Page 1 HiGain HiGain UICK NSTALLATION HLU-231 L...
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Page 2: Specifications
HLU-231 L ® The HiGain HLU-231 List 8D Line Unit is the Central Office (CO) side of a repeaterless T1 transmission system. When used in conjunction with a HiGain Remote Unit (HRU), the system provides 1.544 Mbps transmission on two unconditioned copper pairs over the full Carrier Service Area (CSA) range. -
Page 3: Installation
NSTALLATION To ensure proper installation of the HLU-231: Align the HLU-231 with the shelf rails and slide the unit in. When the HLU is properly seated, the retaining latch on the HLU snaps closed. OWER EQUENCE When the HLU powers up, the four-character display illuminates and reports status messages. -
Page 5: Loopback Testing
ILR-2 LPBK (NREM and CLOC 20 bit errors) For more information about the Maintenance Terminal screens, provisioning, and loopback mode testing, refer to the HLU-231 List 8D technical practice, document number 150-231-184-xx. It can be downloaded from the ADC Website at www.adc.com. Front-panel Alarm Messages Message Description LOSW One of the HDSL loops has lost sync. - Page 6 Front Panel Diagnostic Messages Message Description (normal operating messages in bold) 1=xx or 2=yy Indicates the power of the received HDSL signal on each loop relative to noise. Any value of 06 dB or greater is adequate for reliable system operation. ACQ1 or ACQ2 The multiplexers of the HLU and the HRU or the first doubler are trying to establish synchronization over Loop 1 or Loop 2 of Span 1.
- Page 7 © 2002 ADC DSL Systems, Inc. All rights reserved. Information contained in this document is company private to ADC DSL Systems, Inc., and shall not be modified, used, copied, reproduced or disclosed in whole or in part without the written consent of ADC.