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ADC HiGain HMS-318 L2 Managed Shelf - Network device enclosure/chassis
The HiGain Management Shelf HMS-318 L2 houses a maximum of 22 line units and one HiGain Management Unit (HMU) in its 19-inch chassis. The mounting brackets have adjustable mounts that allow the shelf penetration to conform to existing equipment. Both connectors and wire-wrap pins are provided for connecting to the DSX/G.703 and HDSL spans. Each shelf provides power (TB1) and alarm (TB2) connections, with backplane communications between the HMU slot and the other card slots.
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