Abstract: A method is provided to enable providing broadband communication services to a subscriber having a number of devices connected to a regional gateway (e.g. CPE). The method comprises the steps of: carrying out on authentication process between at one of the subscriber's devices and a network server, upon authenticating the subscriber, downloading information associated with that subscriber to an access node. At the access node, designating a port for communications with the regional gateway, and based on identification of the subscriber, allowing the provisioning of broadband communication services to all of the subscriber's devices connected to regional gateway. When the subscriber's device used for the authentication process is disconnected, the system shall continue allowing the provisioning of the already allowed broadband communication services to the remaining devices that are still connected to the regional gateway.

Abstract: A switching device for telecommunication networks, which comprises I/O ports, arranged by groups in I/O cards, for inputting incoming data streams and outputting outgoing data streams of arbitrary protocols, a switching fabric SF for handling internal data streams, a number of adaptation functional blocks AFBs associated with the switching fabric SF and forming a common pool of AFBs. The switching device also comprises a distribution block DB for switching between the I/O ports and the adaptation functional blocks AFBs, and configurable to provide a required connection between any of the I/O ports positioned on any of the I/O cards, and any of the adaptation functional blocks AFBs from the common pool of AFBs.

Abstract: A method is described for rate adaptation in a telecommunication system comprising a group of bonded transmission links carrying together a binary traffic stream, wherein each of the bonded links is adapted to carry a sub-stream of binary information allocated in a number of bins. In case of changing conditions in at least one bin of at least one bonded link among the group, bit re-allocation is performed between different bonded links in the group, thereby adapting rate in one or more of the bonded transmission links to the current conditions.

Abstract: 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.

Abstract: A technique for carrying out protection of data traffic in a multi-channel multi-section optical communications network by simultaneously using Optical Multiplexed Section (OMS) protection and Optical Channel (OCH) protection; the technique comprises selection of a working optical signal in an OCH protected optical channel, in case of a fault in a section of the network, by relying on an indication associated with OMS switching functionality that is required to overcome the mentioned fault.

Abstract: A technique is proposed for supporting a mobile communication session in a combined communications network comprising a mobile network and a non-mobile access network. In the mobile network, the mobile communication session is associated with a mobile number. The technique comprises: a) associating, in the non-mobile access network, the mobile number with a non-mobile device of the non-mobile network, b) providing an access device being in communication with a plurality of non-mobile devices of the non-mobile network and with a controller of a mobile network, operative to represent the non-mobile device of the plurality of non-mobile devices as having the mobile number; c) selectively conducting the mobile communication session either through a mobile device associated with the mobile number in the mobile network, or through the non-mobile device associated with the mobile number in the non-mobile network.

Abstract: 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 DQB1 formed upstream, creates an updated DQB2 and compares DQB1 with DQB2 to manifest an alarm status change ?DQB for estimating quality of transmission via the network section.

Abstract: A method and a system for performing pre-emphasis of one or more optical channels respectively carrying one or more optical signals, by effecting bit rate of the one or more of the signals, thereby adjusting BER value thereof.

Abstract: To support a changing volume of a voice-grade traffic in an access network having a local exchange with a limited capacity, provide two or more access networks each having subscribers and associated local exchange with a limited capacity; each capable of dividing traffic, outgoing from its subscribers, into the voice-grade traffic portion and data traffic portion, and capable of directing the data traffic portion to a packet network while directing the voice-grade traffic portion to a PSTN network via associated local exchange. Second, detecting the overload condition on one local exchange (LE1). Third, find a remaining one (LE2) of the local exchanges in normal load condition. Fourth, partially diverting the voice-grade traffic intended for the local exchange LE1 and passing the diverted voice-grade traffic to its destination via the packet network and the local exchange LE2.

Abstract: A technique for maintaining a required value of power per optical communication channel in a chain of optical nodes (112, 114, 118, 116) connected by optical fiber spans (111, 119, 121), wherein at least some of the nodes include optical amplifiers (112, 114, 116) with controllable gains, the technique comprises performing automatic gain control at the optical amplifiers so that, in the frame of power gain of each particular optical amplifier (114, 116), to compensate a preceding span loss. The span loss is calculated as power loss on an optical fiber span (111,121) incoming the particular amplifier.

Abstract: A smooth connector circuit for on-line connection of an optical telecommunication module to a main telecommunication unit, where the main unit comprises a common power supply circuit and is connectable to a number of optical telecommunication modules by separately creating with each of them a power connection, a control connection and a communication connection. When inserting an optical module to the main unit, the proposed smooth connector circuit is capable of successively creating the mentioned connections between the optical module and the main unit, so that the power connection is created first and established gradually.

Abstract: The invention describes a two-stage optical amplifier adapted for inserting OADM in the mid-stage, and an integrated assembly designed for implementing the amplifier in a way suitable for forming unidirectional and bi-directional configurations useful in optical networks. One of them is a so-called east-west configuration for a bi-directional transmission, where each direction of the optical transmission is served by the two-stage optical amplifier the 1st stage of which belongs to one integrated assembly, and the 2nd stage—to another assembly.

Abstract: The invention describes a system of two-stage optical amplifiers adapted for inserting OADM in the mid-stage, and an integrated assembly designed for implementing the amplifiers in a way suitable for forming bi-directional configurations useful in optical networks. A so-called east-west configuration for a bi-directional transmission is described, where each direction of the optical transmission is served by the two-stage optical amplifier the 1st stage of which belongs to one integrated assembly, and the 2nd stage—to another assembly.

Abstract: A method, a system and a module are proposed for detecting and locating faults in an optical multi channel network composed of network nodes. The method includes assigning different sub-carrier pilot tones to a number of the nodes comprising Network Elements (NE), applying the different sub-carrier pilot tones to any signal added to the network via the respective nodes, checking presence of one or more of the sub-carrier pilot tones at one or more points of the network, and, based on results of the checking, locating a faulty section of the network in case a fault occurred.

Abstract: A method, a system and a device for encrypting an optical signal to be transmitted via an optical fiber communication link by causing controlled chromatic dispersion of said signal. The controllable decryption device, as well as the controllable decryption device, can be implemented in the form of a variable dispersion compensation module controlled by a decryption key. In the system, the encryption device and the decryption device are controlled in synchronism by an encryption key and a decryption key respectively, the keys preferably being functions of time symmetric with respect to the time axis.

Abstract: An optical switching apparatus in an optical communication network selectively combines and separates, using OTDM and/or WDM, optical signal samples that are obtained by a spread spectrum technique or a combination of optical signal samples that are obtained by a spread spectrum technique and optical signal samples that are carried over discrete channel wavelengths. In upstream communication, when optical signal samples that are received at the optical switching apparatus include upstream optical signal samples that are obtained by a spread spectrum technique, the optical switching apparatus optically converts the optical signal samples provided thereto into a broadband combined series of upstream optical signal samples and routes the broadband combined series of upstream optical signal samples to a destination route.

Abstract: A binary tree-like structure for converting bit rates in a telecommunication system, comprising at least one cyclic generator (CG) adapted to present a higher bit rate called R1 substantially as a sum of two lower bit rates called R2 and R3 by cyclically producing, per n clocks of the bit rate R1, m first type signals as clocks of the bit rate R2 and (n?m) second type signals as clocks of the bit rate R3, where m and n are parameters of the CG and integers such, that m<n. The two lower bit rates R2 and R3, based on its parameters m and n, can be presented as follows: R2=mR1/n, R3=(n?m)R1/n. The higher bit rate R1 of a particular CG is either obtained from outside of the binary tree-like structure or constitutes a lower bit rate of another, upper range CG of the structure, while each of the lower bit rates R2 or R3 of a particular CG is either dispatched away from the structure or constitutes a higher bit rate of another, lower range CG of the structure.

Abstract: An interface device for providing a gateway function between lines of a public switched telephone network (PSTN) that carry digital hierarchy signals and an asynchronous transfer mode (ATM) backbone network that carries signals in ATM format, the interface device comprising: a telephony transceiver operative to receive upstream digital hierarchy signals in a plurality of digital hierarchies from the PSTN; a hierarchy converter associated with the telephony transceiver and operative to convert at least some of said upstream digital hierarchy signals in a plurality of digital hierarchies to upstream signals in a single digital hierarchy distributed over a plurality of logical channels; an inverse multiplexing unit operatively associated with the hierarchy converter and operative to inverse-multiplex the upstream signals in the single digital hierarchy distributed over a plurality of logical channels; an ATM framer operatively associated with the inverse multiplexing unit and operative to map at least some of th

Abstract: A method for diverting communication traffic in an optical network from a first optical link extending between a first and a second locations, to a second optical link extending either directly between the first and the second locations or via a third location, which method comprises the steps of switching traffic at said first location from said first optical link to said second optical link. After determining at the second location that traffic has not been received along the first optical link for a pre-determined period of time, traffic is diverted at the second location to the second optical link.

Abstract: An optical extending device for use in transmission of optical signals which comprise at least one sequence of periodic optical signals, said optical device comprising: a first fiber optic having a characteristic dimensional propagation coefficient equal to ?1 and adapted to be connected to a single mode second fiber optic having a length equal to L0 and a characteristic dimensional propagation coefficient equal to ?0, wherein Lp, the length of said first fiber optic is substantially equal to {[T2/??L0*?0]/?1}*{1?MOD(L0/{T2/??L0*?0]/g(b)}} and wherein: n is an integer 1, 2, 3 . . . and is selected in accordance L0, the length of the single mode second fiber optic; T is a time period of the periodic optical signals; and MOD is the remainder obtained from dividing 10 by {[T2/??L0*?0]/?1}.