TW256005B - Communication protocol fractional terminal equipment - Google Patents

Abstract

A fractional terminal equipment, that according to V-series recommendation connects a data terminal equipment to a fractional network terminal unit with B-channel data speed and communication function with subchannel speed, includes: - V.110 speed transform circuit capable of receiving data sent from data terminal equipment with user data speed and outputting the first bit stream including user data with B-channel data speed; and fractional speed transform circuit capable of receiving the first bit stream and outputting the second bit stream including user data with subchannel data speed to fractional network terminal unit; The V.110 speed transform circuit includes: (1) one first speed transform circuit connecting to data terminal equipment, capable of receiving user data with user data speed and outputting one third bit stream with middle data speed dependent on user data speed, and the third bit stream includes user data and constitutes a special framework architecture; (2) one second speed transform circuit capable of receiving the third bit stream and the first bit stream output with B-channel speed; the first bit stream consists of octets including data bit position with a determined special number dependent on middle data speed, the bit position including the bits of the third bit stream, other bit position including a default binary value; (3) one third speed transform circuit connecting to data terminal equipment and the first speed transform circuit, capable of receiving asynchronous user data from data terminal equipment and outputting synchronous user data to the first speed transform circuit.