Eci Telecom Ltd.

Eitan Yehuda

Idan Kaspit

Eyal Shaked

Ilan Halevi

Eli Korall

Asher Kfir

Ronen Sommer

Noam Goldberg

A technique for exchanging LCAS control information between a first network element and a second network element interconnected by a bi-directional optical communication line, while conveying substantially unidirectional data traffic in the form of a virtual concatenated group (VCG) binary stream transmitted in a first direction via the bi-directional optical communication line, the technique comprising: &#x2014;in the first direction, transmitting the LCAS control information via the bi-directional optical communication line in the VCG binary stream, by placing the information in one or more overhead bytes conventionally specified for the VCG binary stream, &#x2014;in a second (opposite) direction, transmitting the LCAS control information in an existing binary stream non-related to the above-mentioned unidirectional data traffic; the existing binary stream should pass via a communication trail connecting the first network element and the second network element but not obligatory coinciding with the above-mentioned line; the discussed information should be placed in one or more overhead bytes of the existing binary stream.

Method for transmitting LCAS protocol via an optical communication line

Technology for rerouting a data stream in a communication circuit switched mesh network comprising one or more cross-connecting nodes, the data stream comprises a plurality of data frames each associated with at least one overhead byte, and the rerouting is performed by using a path identifier while switching the data stream at one or more cross-connecting nodes; the path identifier is carried by at least one overhead byte associated with at least one of the data frames.

Fast rerouting of traffic in a circuit switched mesh network

A method for enabling communication between synchronous network elements, which is adapted to support dynamic application of various types of changes, such as adding a new channel, to an aligned group of virtually concatenated channels carrying communication traffic between these elements.

Handling traffic in a synchronous communication network

A method and a Network Element (NE) for manifesting alarms by forming a so called combined Data Quality Byte (DQB) for a particular SDH/SONET data transmission stream. The DQB indicates status of alarms at a particular location of the telecommunication network, via which the stream is transmitted. The DQB can be formed by arranging a plurality of alarm signals, currently actual for the particular data transmission stream, in a predetermined byte associated with the stream frame. The NE, upon receiving from an upstream network element a data transmission stream with its DQBformed upstream, creates an updated DQBand compares DQBwith DQBto manifest an alarm status change &#x394;DQB for estimating quality of transmission via the network section.

Method and system for manifesting alarms in a telecommunication network

A method, a device and a system for delay equalizing of fragment data streams transmitted via N individual paths and forming a virtual data stream, wherein the virtual data stream and each of said fragment data streams consisting of data frames; the method including gradual minimization of differential delay of the fragment data streams at one or more intermediate points between a source point and a destination point of the virtual data stream. The gradual minimization of the differential delay can be provided by devices () respectively fitted at the intermediate points; each of the devices comprises a control unit () and N memory buffer blocks (), each associated with a respective individual path.

Method, device and system for delay equalizing in high rate data streams

A method and a system for errorless switching, in a telecommunication network, from a basic data stream to a copy of the basic data stream obtained by bridging of the basic data stream at a first network node, being characterized in that the switching is performed at a second network node receiving both the basic data stream and the copy data stream, upon performing an operation of delay equalization between the basic data stream and the copy data stream.

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Zoran, Israel

Eitan Yehuda