Single-pair Matrix
Single-pair may refer to: * Single-pair high-speed digital subscriber line, a data communications technology * Single-pair shortest-path problem, the problem of finding a path between two vertices such that the sum of the weights of its constituent edges is minimized {{disambiguation ...
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Single-pair High-speed Digital Subscriber Line
Single-pair high-speed digital subscriber line (SHDSL) is a form of symmetric digital subscriber line (SDSL), a data communications technology for equal transmit and receive (i.e. symmetric) data rate over copper telephone lines, faster than a conventional voiceband modem can provide. As opposed to other DSL technologies, SHDSL employs trellis-coded pulse-amplitude modulation (TC-PAM). As a baseband transmission scheme, TC-PAM operates at frequencies that include those used by the analog voice plain old telephone service (POTS). As such, a frequency splitter, or DSL filter, cannot be used to allow a telephone line to be shared by both an SHDSL service and a POTS service at the same time. Support of symmetric data rates made SHDSL a popular choice by businesses for private branch exchange (PBX), virtual private network (VPN), web hosting and other data services. SHDSL features symmetrical data rates in both the upstream and downstream directions, from 192 kbit/s to 2,312&nbs ...
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