DSL Advances

6.1. Applications of SHDSL

The definition of SHDSL was driven to support high capacity network access applications to business and small-medium enterprise customers. Such applications include T1 or E1 extension, fractional T1 or E1 access, wireless base station access to the central office, provisioning of multiple voice channels via a high-access channel (also referred to as a “pair-gain” access), work at home applications supporting data and digitized voice, campus applications, and others. The support of SHDSL for each of these applications is described below.

6.1.1. T1 or E1 Extension Application

A fundamental application of SHDSL is the equivalent to that of HDSL2. In North America, HDSL2 transports a DS1 (1.544 Mb/s) payload on a single ...