H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/52 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2146892
Full channel service is obtained over a modified ISDN BRI interface by emulatingat least one central office (CO) station terminal which provides access to a voice channel over a single digital subscriber line (DSL) for user station terminals whether or not they are ISDN BRI compatible. To this end, an interface is provided for the DSL that emulates an ISDN BRI CO station terminal and acts like a facility to user station terminals. More specifically, a plurality of CO station terminals are emulated on a single multi-point passive bus terminating the single DSL. Each of the emulated CO station terminals presents to the CO switching of fice the appearance of being a CO station terminal. The emulated CO station terminals are configured such that CO features are accessible. Information from the emulated CO station terminals is mapped into existing system structures where such structures are available and compatible with the information from the emulated terminal.
Baker Albert D.
Ng Cho Y.
Toy Albert Victor
Wright Arthur E.
At&t Corp.
Kirby Eades Gale Baker
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