Voice plus 4-wire DDS multiplexer
AssigneeRaychem Corporation
InventorNicholas A. Balatoni
Life of this patent
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Abstract
A method and apparatus 200 for transferring analog voice telephone signals and digital data service signals simultaneously from a telephone company location to a customer premises over a single twisted pair telephone line 205. The present apparatus 200 includes an easily installed voice plus digital data service remote terminal 203 and voice plus digital data service central office terminal 201. The present apparatus can provide a 3-to-1 pair gain by multiplexing signals representing the analog voice telephone signals and 4-wire digital data service signals.
Claims21
A method of transferring signals from a voice channel and a digital data service channel from a telephone company location to a customer premises, said method comprising steps of:
- providing an analog telephone signal and a 4-wire DDS signal at a telephone company location, said 4-wire DDS signal is a bipolar signal;
- converting said analog telephone signal into a first binary signal, converting said 4-wire DDS signal into a second binary signal, and combining said first binary signal and said second binary signal to a higher rate binary signal;
- converting said higher rate binary signal into a digital signal;
- and
- transferring said digital signal to a customer premises over a single twisted pair telephone line.
Apparatus for transferring signals from a voice channel and a digital data service channel from a telephone company location to a customer premises, said apparatus comprising:
- an analog telephone signal source and a 4-wire DDS signal source at a telephone company location;
- and
- a central office circuit converting said analog telephone signal into a first binary signal, converting said 4-wire DDS signal into a second binary signal, combining said first binary signal and said second binary signal to a higher rate binary signal, converting said higher rate binary signal into a digital signal format, and transferring said digital signal to a customer premises over a single twisted pair telephone line.
A method of converting the use of a single twisted pair line into a multiplexed digital use comprising an analog channel and a 4-wire DDS channel, said method comprising the steps:
- installing an office terminal at a telephone company location, said office terminal comprising a central office circuit adapted to convert an analog telephone signal into a first binary signal, adapted to convert a 4-wire DDS signal into a second binary signal, adapted to combine said first binary signal and said second binary signal to a higher rate binary signal, adapted to convert said higher rate binary signal into a digital signal, and adapted to transfer said digital signal to a customer premises over a single twisted pair telephone line;
- and
- installing a remote terminal at a customer premises, said remote terminal comprising a remote terminal circuit adapted to convert said digital signal to said higher rate binary signal, adapted to separate said first binary signal and said second binary signal from said higher rate binary signal, adapted to convert said first binary signal into said analog telephone signal, and adapted to convert said second binary signal into said 4-wire DDS signal for use at said customer premises.
Dependencies are inferred from the claim text.