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HIGH-SPEED 2-WIRE SHORT-RANGE DSL LINE DRIVER RACK CARD
2. Introduction
2.1 Description
The High-Speed 2-Wire Short-Range DSL Line Driver Rack Card provides high-
speed 2-wire connectivity to ISPs, PTTs, and corporations using mDSL (Multi-rate
Digital Subscriber Line) technology. Multi-rate DSL offers the ability to deliver the
maximum bit rate that a twisted-pair line can accommodate. Supporting multiple
line rates from 144 kbps to 2.320 Mbps, the mDSL Rack Card provides “megabit”
speeds to leased-line, LAN-to-LAN interconnection, and WAN access networks over
3.6 miles/5.8 km (1.054 Mbps on 24-AWG/0.5-mm wire).
The mDSL Rack Card allows DTE speeds from 64 kbps to 2.3 Mbps in 64-kbps
increments. Features include loopback diagnostics, out-of-band SNMP/HTTP
remote management capabilities when using the SNMP Management Module
(part number RM261C-SNMP), and externally accessible configuration switches.
As a symmetric DSL NTU, the mDSL Rack Card offers the same data rates in both
directions over a single pair of regular telephone lines using Carrierless Amplitude
and Phase (CAP) modulation. The mDSL Rack Card is designed to fit into Black
Box’s 2U-high rack chassis (part number RM260). This chassis uses a mid-plane
architecture, allowing front cards to be plugged into different rear cards. Please
see the RM260 manual for more information on the power-supply options that are
available.
The mDSL Rack Card Plug-and-Play feature allows you to configure the DTE rate
for the link from the rack card at the central office. The standalone unit at the
customer premise site will automatically configure itself to the DTE rate of the rack
card. Other configuration parameters fall to the default state. This allows changes
in the configuration to be handled from a single end of the link.
2.2 Features
• DSL distances on just two wires using mDSL technology.
• DTE speeds from 64 kbps to 2.3 Mbps.
• 2-wire operation.
• Fits in the 2U Rackmount Chassis (part number RM260).
• Plug-and-Play master capable.
