Cisco Technology, Inc.

Alcatel USA Sourcing, L.p.

Cisco Systems Inc.

Phu Son Le

Paul M Elliott

Philippe J Daniel

Keith Eric Neuendorff

Xiaopin Nie

Charles Scott Roberson

Brian Rushka

Paul M Elliot

Lac X Trinh

Ajaib S Bhadare

Anurag Nigam

Patrick R Bisson

Kate B Amon

Network management information (NMI) contained in a first set of byte locations of a received frame is relocated to a second set of byte locations of another frame. The NMI is then transported through network elements using the second set of byte locations until the NMI is to be transported to a compatible network element, which can understand the NMI. At which time, the NMI is relocated back to the first set of byte locations of frames destined for the compatible network element. The relocation of the NMI from a first set of byte locations to a second set of byte locations allows the NMI to be transparently transported through incompatible network elements.

Method and apparatus for transporting network management information in a telecommunications network

A network element receives frames from multiple ring networks. Each ring network linked to the network element is supported by a designated support program. The received frames are monitored for conditions indicative of a failure in one of the ring networks. Upon detection of a failure condition, the designated support program for the failing ring network is determined and notified. The designated support program then addresses the failure condition by, for example, switching to a backup link. In one example, the multiple ring networks are SONET BLSR networks.

Multiple ring support within a single network element

The present invention discloses a method and apparatus for cross-connecting high-speed telecommunications signals at a cross-connect apparatus. The cross-connect apparatus can transmit the telecommunications signals from an input interface card to a cross-connect card, and from the cross-connect card to an output interface card without any synchronization information. Synchronization of the signals is accomplished with circuitry contained on the interface cards and the cross-connect card. The cross-connect apparatus also includes a control unit for managing the control and timing of the apparatus.

Method and apparatus for routing telecommunications signals

A time slot interchanger ( ) includes a D-channel processing device ( ). The D-channel processing device ( ) includes a main memory ( ), a D-channel memory ( ), and a D-channel assembler ( ). The main memory ( ) receives telephony data and signaling traffic from a subscriber in the form of integrated services digital network signals. Two-bit D-channel signaling portions of each integrated services digital network signals are extracted and placed into the D-channel memory ( ). The D-channel assembler ( ) assembles the two-bit D-channel signaling portions into eight-bit digital signal level zero (DS0) signals. The eight-bit DS0 signals are stored in the D-channel memory ( ) for subsequent transfer with selected telephony data traffic from the main memory ( ) over a synchronous optical network link.

Apparatus and method of processing signaling bits of integrated services digital network signals

The present invention provides a method and structure for allowing more than 16 nodes to be configured in a single SONET BLSR network by utilizing unused portions of the transport overhead of an STS-N frame to expand the node identification field from 4 bits to 8 bits, thereby allowing up to 256 nodes to be present on a single ring.

BLSR node extension

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Rohnert Park, CA, United States of America

Phu Son Le