Abstract: The present invention relates in general to video communication networks and more specifically to a method for interworking between a number of video communication terminals, to a video communication system, and to a video interactive gateway unit. The solution according to the present invention makes it possible to interwork between different terminals e.g. between a low bit-rate multimedia terminal and a packet based multimedia terminal.

Abstract: A method of performing lawful interception of a multimedia call between two or more terminals. The method comprises detecting the initiation of said call at monitoring equipment located in the call path, and forwarding from the monitoring equipment to a gateway, parameters defining at least one of the forward and reverse channels of said call. At least one multimedia call is set up from said gateway to a monitoring terminal in dependence upon the received parameters. Following the setting up of the first mentioned multimedia call, forward and/or reverse channel data is intercepted at said monitoring equipment, the intercepted data routed to said gateway, and the data transmitted to the monitoring terminal over the forward channel of the or each second mentioned multimedia call.

Abstract: A method of setting up a call between first and second nodes of a communication system when the call extends across a circuit switched access network and a packet switched backbone network interconnected by a Media Gateway. A control node obtains from a Home Subscriber Server, the identity of a Media Gateway Control Function controlling that Media Gateway which will terminate the call within the circuit switched access network. The first node calls an access number notified to it by the Media Gateway Control Function, and as part of the call setup procedure, the identity of the Media Gateway selected to terminate the call is communicated to the second node.

Abstract: A method of setting up and/or controlling a multimedia call involving an H.324 enabled user terminal and a circuit switched connection terminating at the user terminal and at a video gateway, the method comprising: sending DTMF control signals over the circuit switched connection within H.245 protocol control messages; and on the basis of said DTMF control signals, routing or re-routing the connection to an appropriate data source or mapping the connection to an appropriate data source.

Abstract: A method of setting up a call between first and second nodes of a communication system, said call extending across at least one circuit switched access network and a packet switched backbone network, the networks being interconnected by at least one Media Gateway. The method comprises, at a control node, obtaining ftoin a Home Subscriber Server the identity of a Media Gateway Control Function controlling that Media Gateway which will terminate the call within the circuit switched access network. The first node calls an access number notified to it by the Media Gateway Control Function, and as part of the call set-up procedure the identity of the Media Gateway selected to terminate the call is communicated to the Media Gateway Control Function.

Abstract: A method of performing lawful interception of a multimedia call between two or more terminals. The method comprises detecting the initiation of said call at monitoring equipment located in the call path, and forwarding from the monitoring equipment to a gateway, parameters defining at least one of the forward and reverse channels of said call. At least one multimedia call is set up from said gateway to a monitoring terminal in dependence upon the received parameters. Following the setting up of the first mentioned multimedia call, forward and/or reverse channel data is intercepted at said monitoring equipment, the intercepted data routed to said gateway, and the data transmitted to the monitoring terminal over the forward channel of the or each second mentioned multimedia call.

Abstract: Disclosed is a method and system for performing a Serving Radio Network Subsystem (“SRNS”) Relocation for a given User Equipment (“UE”) in a Universal Mobile Telecommunications System (“UMTS”) network between a UMTS radio network and a UMTS core network, in which the UMTS radio network and the UMTS core network are logically separated, the method comprising: sending a Relocation Required message from the serving Radio Network Controller (“RNC”) to the core network; and sending a Relocation Request message from the core network to the Target RNC.

Abstract: A method of facilitating the correction of an incorrect hyperlink contained in a source web page stored on a first web server (7) at an address identified by a first Universal Ressource Locator (URL) and which hyperlink points to a second URL at a second web server (8). The method comprises copying the source page from the first web server (7) to a browser of a client computer (2) via the Internet, and selecting the incorrect hyperlink at the browser so as to transmit a URL resource retrieval request from the browser to the second web server (8). The request is received at the second web server (8) which responds by returning to the browser a corrected URL. The connected URL and said first URL are transmitted from the browser to said first web server (7).

Abstract: The present invention relates in general to video communication networks and more specifically to a method for interworking between a number of video communication terminals, to a video communication system, and to a video interactive gateway unit. The solution according to the present invention makes it possible to interwork between different terminals e.g. between a low bit-rate multimedia terminal and a packet based multimedia terminal.

Abstract: Disclosed is a method and system for performing a Serving Radio Network Subsystem (“SRNS”) Relocation for a given User Equipment (“UE”) in a Universal Mobile Telecommunications System (“UMTS”) network between a UMTS radio network and a UMTS core network, in which the UMTS radio network and the UMTS core network are logically separated, the method comprising: sending a Relocation Required message from the serving Radio Network Controller (“RNC”) to the core network; and sending a Relocation Request message from the core network to the Target RNC.

Abstract: A method of performing a SRNS Relocation in a UMTS network for a given UE, the method comprising sending a Relocation Required message from the serving RNC to the core network and sending a Relocation Request message from the core network to the target RNC, the Relocation Required message containing a RRC Initialisation Information container which is incorporated transparently by the core network into the Relocation Request message, and the RRC Initialisation Information container in turn containing information enabling a mapping to be made between RABs and RBs for the UE.

Abstract: A method of sending BSSAP+ messages over a SGSN/VLR interface of a mobile telecommunications system, the method comprising incorporating into BSSAP+ messages, or appending thereto, an identifier which allows the messages to be associated with the transactions to which they relate. This may be achieved either by placing the BSSAP+ protocol layer over the TCAP layer whereby the TCAP Transaction ID provides the identifier or by modifying the BSSAP+ protocol to allow for inclusion of the identifier directly into the BSSAP+ messages.

Abstract: The present invention relates to a method and means for roaming in a cellular radio communication system with a pool of core network nodes, e.g. an MSC-pool (201). A Subscriber Identification Service Node (SISN) is used to handle roaming from a service area supported by a previous MSC/VLR (205) in the MSC-pool to a service area supported by a new MSC/VLR (303) arranged outside of the MSC-pool. The SISN (301) receives an identity request from the new MSC/VLR (303) and forwards it to the previous MSC/VLR (205). The SISN receives a response from the previous MSC/VLR and relays it to the new MSC/VLR. This means that the SISN helps the new MSC/VLR (303) to retrieve data from the right MSC/VLR within the MSC-pool (201).

Abstract: The present invention relates to a method and an arrangement and an apparatus for implementing and monitoring a call in a telecommunications system in which the call is routed from a first transceiver to a second transceiver via a first switching center and a second subsequent switching center. In the solution a call setup message from the first switching center to the second switching center includes an address of said first switching center, the call setup message is intercepted at a telecommunications node intermediate to the first and second switching centers, whereafter the address of the first switching center is replaced with an address of the intermediate node.

Abstract: A method of initiating a call to a multi-mode mobile telecommunication device (2) served by two or more access networks (6, 7) comprises sending a paging signal that specifies a preferred access network to the mobile telecommunication device. This ensures that the call will not be rejected as a consequence of being set up over an access network that cannot support the call. The invention also provides a method of completing a call to a mobile telecommunication device in which a paging response is returned via a first access network (6). It is then determined whether the first access network can support the call. If the first access network cannot support the call, rather than rejecting the call, according to the invention a communication channel is set up to the mobile telecommunication device over another access network (7) that can support the call.

Abstract: A method of charging at a mobile switching centre, MSC (5) of a mobile telecommunications network (2) in respect of a call initiated by a mobile terminal (1) registered with the network (2) and terminating outside of the network. At the MSC (5) the call is classified, according to the associated A-number and/or the B-number, as corresponding either to a call for which the MSC (5) is to be the charge determination point or to a call for which the charge determination point is located outside of the mobile telecommunications network (2). In the event that the call belongs to the latter class, the MSC (5) receives tariff information from the external charge determination point (7,9) and calculates charge information on the basis of the received tariff information.

Abstract: An apparatus in a wireless telecommunications network is provided with Short Message Service via a circuit switched channel unless the apparatus is operating in a packet mode. If the apparatus is operating in the packet mode, the apparatus is provided with Short Message Service via a packet channel.

Abstract: An apparatus in a wireless telecommunications network is provided with Short Message Service via a circuit switched channel unless the apparatus is operating in a packet mode. If the apparatus is operating in the packet mode, the apparatus is provided with Short Message Service via a packet channel.