Importance

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Abstract

High-speed digital transmission can be achieved with existing phone lines and HDSL chipsets while retaining plain old telephone service (POTS) with full failsafe capability. One original digital data signal ?4! at a rate of at least 352 kbps and typical 384 kbps and one POTS channel ?10! digitized at 64 kbps are multiplexed by a HPCS card ?6! of a signal provider ?1!. The resulting digital signal is transported over a twisted based on the current technology. At a receiving end, the signal is demultiplexed and regenerated by a subscriber's HPCS card ?7!. The subscriber's HPCS card is line-powered via the cable ?2! to avoid dependence upon local power. The regenerated signals are transmitted over one POTS line ?42! and one data line ?8! to or within a remote premise. Both HPCS cards have bypass relays for the POTS line to ensure the subscriber's POTS access in the event of a local power outage or electronic failure.

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First Claim