Deactivation of extended basic rate ISDN link
AssigneeAdtran, Inc.
InventorRobert J. Toth
Life of this patent
Estimating the term…
Abstract
An embedded operations channel (EOC)-based signalling mechanism is incorporated within transceiver interface (U-BR1TE) components of an integrated services digital network (ISDN) telecommunication system, for effecting a relatively fast, warm start reactivation of a previously deactivated extended ISDN link between an ISDN switch and customer premises equipment. In response to the EOC-embedded ‘wake-up the loop’ message, the receiving U-BR1TE card supplies a 10 Khz wake-up tone to its associated termination equipment (either to the NT-1 in the case of a switch-sourced reactivation, or to the ISDN switch in the case of an NT-1 sourced wake-up request), to reestablish the ISDN loop.
Claims13
For use with a digital telecommunication network having a first digital communication signal transceiver, through which digital communication signals conveyed over an extended distance communications link are interfaced with a local loop, to which a digital communications switch is coupled, and a second digital communication signal transceiver, through which said digital communication signals conveyed over said extended distance communications link are interfaced with a remote loop, to which a customer premises interface serving digital communications equipment at a customer premises site is coupled, a method of reactivating a communications path between said digital communications switch and said digital communications equipment at said customer premises site comprising the steps of:
- (a) causing one of said first and second digital communication signal transceivers to transmit a prescribed communications path reactivation message within an out-of-band communication channel of said extended distance communications link;
- and
- (b) in response to another of first and second digital communication signal transceivers receiving said prescribed communications path reactivation message within said out-of-band communication channel of said extended distance communications link, reactivating said communications path between said digital communications switch and said digital communications equipment at said customer premises site.
For use with an integrated services digital network (ISDN) telecommunication system having a first U Basic Rate-One Transmission Extension (U-BR1TE) transceiver, through which ISDN communication signals conveyed over an extended distance digital communications link are interfaced with a local metallic two-wire path, to which an ISDN switch is coupled, and a second U-BR1TE transceiver, through which said ISDN communication signals conveyed over said extended distance digital communications link are interfaced with a remote metallic two-wire path, to which a customer premises interface serving digital communications equipment at a customer premises site is coupled, a method of reactivating previously deactivated ISDN connectivity between said ISDN switch and said digital communications equipment at said customer premises site comprising the steps of:
- (a) causing one of said first and second U-BR1TE transceivers to transmit an ISDN connectivity reactivation message within an extended operations channel (EOC) transported by said extended distance communications link;
- and
- (b) in response to another of first and second U-BR1TE transceivers receiving said ISDN connectivity reactivation message within said EOC channel, reestablishing ISDN connectivity between said ISDN switch and said digital communications equipment at said customer premises site.
For use with an integrated services digital network (ISDN) telecommunication system having a first U Basic Rate-One Transmission Extension (U-BR1TE) transceiver, through which ISDN communication signals conveyed over an extended distance digital communications link are interfaced with a local metallic two-wire path, to which an ISDN switch is coupled, and a second U-BR1TE transceiver, through which said ISDN communication signals conveyed over said extended distance digital communications link are interfaced with a remote metallic two-wire path, to which a customer premises interface serving digital communications equipment at a customer premises site is coupled, an arrangement for reactivating previously deactivated ISDN connectivity between said ISDN switch and said digital communications equipment at said customer premises site comprising:
- a first communications control processor in one of said first and second U-BR1TE transceivers that is programmed to initiate transmission of an ISDN connectivity reactivation message within an extended operations channel (EOC) transported by said extended distance communications link;
- and
- a second communications control processor in another of first and second U-BR1TE transceivers, that is programmed to reestablish ISDN connectivity between said ISDN switch and said digital communications equipment at said customer premises site, in response to said another U-BR1TE transceiver receiving said ISDN connectivity reactivation message within said EOC channel.
Dependencies are inferred from the claim text.