Data Race Rally 56 DSU 30-1056V2 Dual Channel 56 Kbps Desktop DSU/CSU

Data Race Rally 56 DSU 30-1056V2 Dual Channel 56 Kbps Desktop DSU/CSU

The Data Race Rally 56 DSU (model 30-1056V2, also known as the Rally 56V2) is a desktop dual-channel Data Service Unit / Channel Service Unit (DSU/CSU) designed for 56 Kbps synchronous leased-line data connections. Manufactured by Data Race Inc. in the USA and compliant with FCC Part 68 rules, it provides the interface between customer premise equipment and a digital leased line or Switched 56 circuit.

Specifications & What's Included

• Manufacturer: Data Race Inc.
• Model: Rally 56 DSU / 30-1056V2 (Rally 56V2)
• Data Rate: 56 Kbps
• Number of Channels: 2 (Channel 1 and Channel 2)
• Rear Channel Ports: Two DB-25 connectors (Channel 1 and Channel 2)
• Rear Channel 1 also features a multi-pin connector block (visible on rear panel)
• Line Interface: Single RJ-style line port on rear panel
• Power: DC jack on rear panel (power adapter not included)
• Front Panel LED Indicators: INS, CD, RTS, CTS, TXD, RXD
• Test Modes (front panel selector): ST, DL, LL, RT, SELECT
• Form Factor: Desktop (freestanding)
• Standards Compliance: FCC Part 68
• FCC Registration Number: 1KGUSA-61472-DD-N
• Country of Manufacture: United States
• Date of Manufacture: August 1993
• Included: Unit only — no power adapter

Applications

DSU/CSU units like the Data Race Rally 56 serve as the termination point for a digital leased line at the customer premises, converting the digital signal from the telephone company's network into a format usable by routers, bridges, or other DTE equipment via a serial interface. The Rally 56 was designed for 56 Kbps Switched 56 and dedicated leased-line circuits that were standard for business WAN connectivity in the early-to-mid 1990s. At that time, 56 Kbps digital lines were a mainstream option for connecting branch offices, point-of-sale systems, and frame relay nodes before the widespread rollout of T1 and broadband services. The dual-channel configuration allowed connection of two separate DTE devices or circuits through a single unit. Data Race was a well-regarded manufacturer of DSU/CSU and modem products during this era, and the Rally line was sold into enterprise and government networking environments. Today these units are primarily of interest to legacy network maintainers, collectors, and hobbyists working with vintage synchronous networking equipment.