Abstract: A method is disclosed for establishing and adapting communication link parameters in xDSL transmission systems. The method determines a frequency allocation scheme that makes the delivery of both xDSL services and traditional telecommunications services possible, and uses information about service bit-rate requirements and the deployment characteristics of a given local loop to select an optimal combination of symbol rate and transmission modulation density that is capable of delivering desired xDSL services. The method includes the steps of establishing communication between xDSL termination units, and determining a maximum transmission modulation density that can be used for a plurality of predetermined symbol rates. One method of performing these steps is a symbol rate stepping method in which communication is initiated at a fraction of the final symbol rate, and the symbol rate is iteratively stepped up until the final symbol rate is reached.

Abstract: A method for providing data service to locations an extended distance from an access network includes generating a downstream signal, providing the downstream signal to a first transmitter and a second transmitter, transmitting the downstream signal over media to a location, generating an upstream signal, providing the upstream signal to a first receiver and a second receiver, and receiving the upstream signal over the media from the location. A transceiver for use in an access network providing data services includes a media connecting the access network to a location, a first transmitter for transmitting a first signal at a first frequency, a second transmitter for transmitting the first signal at a second frequency, a first receiver for receiving a second signal at a third frequency, and a second receiver for receiving the second signal at a fourth frequency.

Abstract: A method and system for providing POTS/xDSL services line sharing for multiple subscribers over the same twisted wire pair is disclosed herein. The lower end of a twisted wire pair's spectrum is used to deliver narrowband services such as POTS to a first subscriber while the higher end of the spectrum is used for high-speed services such as video or data destined to a second subscriber. A POTS splitter remotely located from the central office (CO) separates the POTS signals from the XDSL signals and forwards each signal to its destined subscriber.