A system and method of the present invention improves data transmission
speeds by fixing the lower corner frequency at a frequency above voice
band in a symmetric DSL transmission system. By using a fixed lower
corner frequency that is above the voiceband and increasing the upper
corner frequency upward as the symbol rate increases, the communication
equipment systems utilize symmetric frequency plans that incorporate the
relatively low loss, low crosstalk spectrum range while still being able
to operate on the same line as analog voice band. Another aspect of the
present invention is directed to multiplexing a first modem for
communicating information packets between the first modem and a plurality
of second modems via a single two-wire (e.g. telephone subscriber) lines.
The present invention provides a Multi-Access (MA) protocol that enables
a single link to be utilized by more than one access device (e.g., a CPE
Modem). The Multi-Access protocol of the present invention provides a
means to connect to multiple endpoints on a single local loop. Each CPE
Modem may communicate directly with a modem at a CO location thereby
removing the need for expensive gateway devices and secondary in-building
cabling to support multiple access points.