Dual DDS data multiplexer
AssigneeRaychem Corporation
InventorNicholas A. Balatoni
Life of this patent
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Abstract
A method and apparatus 200 for converting dual 4-wire digital data services (DDS-1 and DDS-2) for transmission over a single twisted pair telephone line 205. The present method includes use of a digital data service remote terminal 219 and a digital data service central office terminal 201. Each terminal converts more than one 4-wire digital data services into a 2B1Q signal for transmission over the single twisted pair telephone line 205. The present method provides an efficient and cost effective technique for increasing 4-wire digital data services to a customer premises without a corresponding increase in the number of telephone lines.
Claims26
A method of transferring digital data over a single twisted pair from a first location, said method comprising steps of:
- providing a plurality of 4-wire DDS signals from a channel bank at the first location, each of said first plurality of 4-wire DDS signals being a bipolar signal;
- combining said plurality of 4-wire DDS signals into a binary signal, and converting said binary signal into a digital signal, said digital signal being selected from a group consisting of a 2B1Q format and a 4B3T format;
- transferring said digital signal over said single twisted pair telephone line for use at a second location.
An apparatus for transferring digital data over a single twisted pair from a first location, said apparatus comprising:
- a plurality of 4-wire DDS signals sources from a channel bank at the first location, each of said plurality of 4-wire DDS signals being a bipolar signal;
- and
- a central office circuit combining said plurality of 4-wire DDS signals into a binary signal, converting said binary signal into a digital signal;
- and for transferring said digital signal over a single twisted pair telephone line for use at said second location, said digital signal being selected from a group consisting of a 2B1Q format and a 4B3T format.
Dependencies are inferred from the claim text.