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Фрагмент инструкции
The HTU-R then sets its configuration to match the HTU-C M. Rotary Switch Used to select operation of the line build-out equalizer in series with the DSX-1 output. R-HTU Function Description REM Remote Loopback C-C M is not in loopbackIf the HTU ssing REM activatesthe, pre k towards the customer. If the HTU-C M isin loopback,loopbac pressing REM deactivatesthe loopback. LOC Local Loopback If the HTU-R isnotin loopback, pressing REM activatesthe k towards the customer. If the HTU-R isin loopback,loopbac pressing REM deactivatesthe loopback. HTU-C 1245001L2 133 266 DSX-1 399 LBO 533 B8ZS FRM ESF NIU LB DIS LBK TIMEOUT DIS H D S LP1 TX LP2 L E Q DS1 RX ALM 0 EXT AMI UFRM SF EN EN Line Build-Out Rotary Switch SW1 SW1 SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 Function EXT 0 133 266 399 533 Loopback Timeout Enabled Disabled NIU Loopback Enabled Disabled Manual Frame Select SF ESF T1 Framing Unframed Framed Manual Code Select AMI B8ZS Description Selects external il ne bu li d-out 1 Line length from 0-133 feet of ABAM cable Line length from 133-266 feet of ABAM cable Line length from 266-399 feet of ABAM cable Line length from 399-533 feet of ABAM cable Line length from 533-655 feet of ABAM cable With SW1-1 at EN, loopback timeout is enabled (20 minutes). 2, 3 With SW1-1 at DIS, loopback timeout is disabled. Programs the ADTRAN HDSL system to respond to traditional T1 network interface unit (NIU) loop-up and loop-down codes. Frame selection With SW1-3 at SF, superframe format is selected. With SW1-3 at ESF, extended superframe format is selected. Selects the T1 framing mode With SW1-4 at UFRM, unframed operation is selected. SW1-3 setting is ignored. With SW1-4 at FRM, framed operation is selected. Selects alternate mark inversion or binary 8 zero substitution codes. With SW1-5 at AMI, alternate mark inversion is selected. With SW1-5 at B8ZS, binary 8 zero substitution is selected. 1 If external line build-out is selected, the signal transmitted by the HTU-C M is a 12V p-p signal. This must be considered when measuring the signal at the DSX EQ faceplate Bantam jack. The signal may appear hotter than it should be. 2 Loopback timeout must be selected prior to initiating a loopback. 3 60 and 120 minutes is selectable from the craft interface. 61245.001L2-13A Section 61245001L2-13, Issue 1 ADTRAN PRACTICES 5th Gen HTU-C/HTU-R Quick Start guide HDSL DEPLOYMENT GUIDELINES The ADTRAN HDSL system is designed to provide DS1 based services over loops designed to comply with Carrier Service Area (CSA) guidelines. CSA deployment guidelines are given below. 1. All loops are non-loaded only. 2. For loops with 26-AWG cable, the maximum loop length including bridged tap lengths is 9kft. 3. For loops with 24-AWG cable, the maximum loop length including bridged tap lengths is 12kft. 4. Any single bridged tap is limited to 2kft. 5. Total bridged tap length is limited to 2.5kft. 6. The total lenght of multi-gauge cable containing 26-AWG cable must not exceed: 12 -{(3*L26)/9} - LBTAP (...
Эта инструкция также подходит к моделям:Сетевое оборудование - HTU-R (25.28 kb)