Broadband Technologies, Inc.

Other

Pliant Systems, Inc.

Thomas E O'Shea

Randall Sharpe

Paul W Casper

James W Toy

J Richard Jones

Gregory M Evans

Richard N Sears

Mark Crane Wartski

A centralized cross-connect (DS0)-time slot routing scheme for multiple bandwidth communication circuit cards is executed by a supervisory control card installed in a distributed backplane of a time division multiplex (TDM)-based communication system equipment shelf. The distributed backplane supports a plurality of TDM time slots, and has a plurality of card slots in which communication circuits cards are installed. A relational database provides a transport association among the TDM time slots of the backplane and DS0 communication channels of communication circuits cards that allows any DS0 communication channel of any port of any communication circuit card to be associated with any TDM communication transport time slot of the backplane. The supervisory control card controls the transport of DS0 communication channels in selected TDM communication transport time slots in accordance with the contents of the relational database.

Centralized routing scheme for distributed cross-connect using synchronized address field

An out-of-band signaling mechanism for a T-1 multipath digital time division multiplex telecommunication system transports signaling information exclusive of in-band, robbed bit signaling. The out-of-band signaling mechanism reserves a portion of the available bandwidth of a DS0 channel for exclusive transport of signaling information as an out-of-band DS0 signaling channel, and employs the remaining portion of the available bandwidth of that same DS0 channel as a sub-rate data communication DS0 channel.

Use of sub-rate out-of-band channel to transport signaling bits over

A fiber optic telecommunication system has master site linked to a plurality of subscriber interface sites by a single pair of optical fibers. Downlink messages are transmitted in a continuous TDM format over a first optical fiber from the master site to subscriber interface sites, and in a burst mode TDMA format over a second optical fiber from the subscriber interface sites to the master site. Each subscriber interface site is coupled to the optical fiber link by way of a multiple fan-out fiber coupling pedestal at a common location on the fiber pair. To prevent collisions between successive uplink bursts from the subscriber interface sites, a guard band separates successive uplink messages from one another. The guard band duration accommodates optical fiber transmission distance between the common location on the uplink optical fiber and the subscriber interface site whose differential optical fiber transmission distance from the common location is greatest. A subscriber location has a television decoder associated with the subscriber's television set, through which television channel selection signals are input by the subscriber for transmission from the subscriber interface site to the master site. Power is provided by way of a replaceable battery pack, housed in a subterrestrial bell jar configuration, effectively insulating the battery pack from extreme temperature changes and the intrusion of moisture.

Fiber optic telecommunication system employing continuous downlink,

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Chapel Hill, NC, United States of America

Thomas E O'Shea