Interface arrangement for providing ISDN basic rate interface fu

Details Interface arrangement for providing ISDN basic rate interface fu Interface arrangement for providing ISDN basic rate interface fu

1995-10-17

1998-02-17

Safourek, Benedict V.

Multiplex communications

Channel assignment techniques

Details of circuit or interface for connecting user to the...

370522, H04L 1250

Patent

active

057198705

ABSTRACT:
Full channel service is obtained over a modified ISDN BRI interface by emulating at 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 office 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.

REFERENCES:
patent: 4592047 (1986-05-01), Fundneider
patent: 5305312 (1994-04-01), Fornek et al.
patent: 5315595 (1994-05-01), Allouis et al.
patent: 5333132 (1994-07-01), Chuniaud et al.
ITU-T I.411 Standard, dated Mar., 1993, entitled "ISDN User-Network Interfaces -References Configurations".
American National Standard for Telecommunications (ANSI) T1.601-1992 entitled "Integrated Services Digital Network (ISDN) Basic Access Interface for Use on Metallic Loops for Application on the Network Side of the NT (Layer 1 Specification)" approved Feb. 21, 1992 by ANSI, Inc.
Q.932 Protocol COM XI-R 239-E, Study Group XI-Report R239 dated Jun., 1992, entitled "Generic Procedures for the Control of ISDN Supplementary Services".
I.430 COM XVIII-R 119-E (Study Group XVIII-Report R 119) dated Jul., 1992, entitled "Recommendations of the I.430-Series Submitted for Approval at the Xth CCITT Plenar Assembly".
Revised Recommendation Q.921 COM XI-R 205-E (Study Group XI-Report R 205) dated Jun. 1992 entitled "ISDN User-Network Interface-Data Link Layer Specification".
Study Group XI-Report R 238-E May 1992, Recommendation Q.931 entitled "ISDN User-Network Interface Layer 3 Specification for Basic Call Control".

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