Patent ID: 6584078
Filing Date: 2003-06-24
Classification: H04L

Abstract:
A system for establishing full duplex data communication with a remote device over a telephone communications connection, comprising:low speed communication means for communicating at a low speed rate across said communications connection in accordance with a low-speed analog modulation protocol, thereby establishing a low speed communication channel with said remote device; high speed communication means for communicating at a high speed rate across said communications connection in accordance with a high speed pulse modulation protocol that utilizes different pulse levels, thereby establishing a high speed communication channel with said remote device, said high speed communication means communicating concurrently with said low speed communication means; and digital-to-digital translation means associated with said high speed communication means, said digital-to-digital translation means for receiving first digital data words and translating said first digital data words into second digital data words, wherein at least one of said first digital data words corresponds to a pulse level that is unresolvable at said remote device when transmitted across said communications connection and received by said remote device, said digital-to-digital translation means configured to identify said one digital data word as corresponding to an unresolvable pulse level and to translate said one digital data word into a second digital data word corresponding to a pulse level that is resolvable at said remote device when transmitted across said communications connection and received by said remote device.