Isdn basic rate interface central office station terminal...

Details Isdn basic rate interface central office station terminal... Isdn basic rate interface central office station terminal...

H - Electricity

04

L

H04L 12/52 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2146891

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 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 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. New structures have been created so that CO supplementary services can be invoked by the emulated CO station terminals.

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