HLU-432 L ® ® The ADC HiGain HLU-432 List 2 line unit is the Central Office (CO) side of a repeaterless, T1 transmission system for 200/400 mechanics (Remote type) shelves and enclosures. When used in conjunction with a HiGain Remote Unit (HRU), the system provides 1.544 Mbps transmission on two unconditioned copper pairs over the...
Observe HDSL & DS1 pinouts and wire accordingly to avoid placing HDSL span power voltage on DS1 equipment. Wiring these leads incorrectly will result in equipment damage and void all warranties. NSTALLATION To ensure proper installation of the HLU, align the line unit with the enclosure slot guides and slide the unit in.
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11100 Loops down any of the above loopback commands. Copies of this publication or the user manual (LTPH-UM-1193-01) can be downloaded from the ADC website at www.adc.com. To order a hard copy, please contact your sales representative. System Configuration Codes...
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Front-Panel Diagnostic Messages Message Description 1=xx or 2=yy Indicates the power of the received HDSL signal on each loop relative to noise. Any value of 6 dB or greater is adequate for reliable system operation. nHDU Number (n) of doublers in the circuit. INSL xxDB The maximum Insertion Loss (INSL) message appears followed by xxdB, where xx is the maximum insertion in dB of all spans and loops.