DEC WANcontroller 622 PTT Information

This document outlines the BABT-approved service specifications for the DEC WANcontroller 622, ensuring its compliance for use in the UK. It details the technical requirements for Service Category 2, which uses the X.21bis (CCITT recommended) interface, including electrical (V.35) and physical (ISO 2593, BS 6623 part 4, 1986) standards.

The device supports data rates of 48, 56, and 64 Kbits/s, with compatibility specified for UK Public Telecommunications Operators (PTTs) such as British Telecommunications (BT), Kingston Communications (Hull), and Mercury Communications (MCL) for each data rate.

Additionally, the document provides power rating details (5V at 2.5A, 12V at 0.1A, -12V at 0.1A), stressing that power drawn must be within the host power supply's limits. It also specifies cable requirements, including approved adapter and extension cables, and notes that the total cable length must not exceed 27 feet, requiring the use of approved cables conforming to specific standards like NS/G/1235/100009.