HTU-2

n x 64 kbps HDSL Access Unit

• Extends the range of data transmission using HDSL technology
• n x 64 kbps transmission up to 2.048 Mbps over 4-wire
• Range up to 4.8 km (3 miles) over 24 AWG, 4-wire
• Digital interfaces: V.35, X.21, RS-530, V.36/RS-449, G.703 (2.048 Mbps) or built-in Ethernet (bridge)
• Supports priority bumping
• SNMP management via the LRS-24 rack or via SLIP port
• Setup and monitoring via front panel LCD or via supervisory port
• Works opposite Megaplex and DXC HDSL cards

HTU-2 uses HDSL technology to extend the normal range of n x 64 kbps digital interfaces. It uses 2B1Q line coding, equalization, adaptive filtering and echo cancellation to compensate for line impairments, bridge taps and mixed cabling. This provides high immunity to background noise and enables transmission of multiple HDSL lines in the same physical cable.The HTU-2 extends the range of data transmission up to 4.8 km (3 miles) over a 24 AWG, 4-wire copper line and up to 9 km (5.6 miles) with a repeater.The HTU-2 supports priority bumping. This enables the user to choose which timeslots will remain active in case one of the pairs is lost.The digital interfaces supported are V.35, X.21, RS-530, V.36/RS-449, G.703 (2.048 Mbps), Ethernet via a built-in bridge with VLAN support or built-in router.The HTU-2 can work opposite the HTU-E1 for connectivity between digital interfaces at the customer premises and an E1 backbone at the central office.The HTU-2 can provide a remote power feed for an HDSL repeater or an HTU-2/P unit. For this option, a standalone HTU-2/PF should be ordered.An embedded management channel transmits remote control and diagnostic information simultaneously with no interference to the data flow. Monitoring, control and diagnostics of local and remote units are available via the front panel LCD display or via a supervisory port.The HTU-2 is available as a standalone unit or as a card for the LRS-24 19" rack with central SNMP management. It can also work opposite the DXC with DHL/E1/2W card or the Megaplex with HS-H2 or MHL-2E1/2T1 cards.