TAILIEUCHUNG - HiGain Doubler Units • Ultra-low system delay • BPV transparency for copper-fed DLC support • Stratum 1 clock capable • Full compatibility with the installed base of HiGain systems • Variety of industry-standard mechanics • NEBS Level 3 compliant • 5-span reach (60 kft on 24 AWG) • 4-span (three doublers and a remote unit) line powering • Lowest power consumption and heat dissipation • Low voltage (

HiGain® doubler units (HDUs) allow HiGain systems to be used for applications outside the Carrier Service Area (CSA), increasing the range by up to five times. Span equipment consists of HDUs that can be deployed in the existing repeater enclosures or in remote enclosures for higher deployment density and lower deployment costs. Enclosures are available for both above- and below-ground installations. | Extended T1 Access HiGain doubler units HDUs allow HiGain systems to be used for applications outside the Carrier Service Area CSA increasing the range by up to five times. Span equipment consists of HDUs that can be deployed in the existing repeater enclosures or in remote enclosures for higher deployment density and lower deployment costs. Enclosures are available for both above- and below-ground installations. HiGain provides HDSL repeaterless transport of T1 service over two unconditioned copper pairs at distances up to 12 000 ft on 24 AWG mm or 9 000 ft on 26 AWG mm . HiGain systems are used by telco providers worldwide to turn up high-speed data voice and video services in a matter of hours. Features 5-span reach 60 kft on 24 AWG 4-span three doublers and a remote unit line powering Lowest power consumption and heat dissipation Low voltage 140 VDC powering of up to two spans one doubler Safest line powering Class A2 or Class A3 Ultra-low system delay BPV transparency for copper-fed DLC support Stratum 1 clock capable Full compatibility with the installed base of HiGain systems Variety of industry-standard mechanics NEBS Level 3 compliant DC Ordering Information Model No. Description HDU-404 L2 Micro doubler 200 mechanics HDU-407 L2 Micro doubler DDS ISDN mechanics HDU-409 L2 Micro doubler 239 mechanics single-slot HDU HDU HDU HDU DSX-1 Line Unit HLU 12 kft 12 kft 12 kft 12 kft 12 kft Remote Unit HRU -48 VDC Local Power Required DS1 --------------------------------------60 kft on 24 AWG------------------------------------------ Figure 1 5-Span Extended Reach HDSL Transmission Line Code 784 kbps 2B1Q Transmission dual-duplex Media two non-loaded two-wire metallic cable pairs Output Signal dBm dB into 135 Impedance 135 Maximum Provisioning Loss 35 dB at 196 kHz 135 System One-way DS1 Delay 200 ps HLU and HRU 80 ps HDU Wander looped UI max 1 UI 648 ns Wideband Jitter looped UI max Narrowband Jitter looped UI max Reach Each Span CSA .

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