Abstract: Encapsulated SCSI data packets in a specified format within an MPLS label are transported to a destination over a network according to the MPLS protocol. The SCSI data packets in a header structure followed by labelling according to the MPLS protocol and the labelled data packets are transported via an MPLS network. A Label Switched Path is established for the data using an MPLS routing protocol. A Channel Identifier is assigned to the data packet. The resulting data packet is labelled by an MPLS label. The labelled data packet is transported according to the MPLS protocol to the destination.

Abstract: A cell switching method and system are disclosed that divide an input ATM cell into ATM adaptation layer (AAL) 2-type common part sublayer (CPS) packets. The divided CPS packets are stored in different first storage areas, in accordance with virtual paths/virtual channels (VPs/VCs) of the respective CPS packets, and identifiers of the first storage areas are also stored. The stored CPS packets are read in the order of the stored first identifiers. Thereafter, the read CPS packets are stored in second storage areas, in accordance with respective CIDs, and second identifiers of the second storage areas are stored. The CPS packets stored in the second storage areas are read in the order of the stored second identifiers and multiplexed to generate ATM cells.

Abstract: Methods and systems for per-session dynamic management of media gateway resources are disclosed. According to one method, the logical and physical resources in a media gateway are divided and dynamically managed at the Transport Layer (i.e. OBI Layer 4), which results in finer granularity than managing such resources statically at the Data Link Layer (i.e. OBI Layer 2) or Network Layer (i.e. OBI Layer 3). Voice-processing resources provided by voice server cards may be pooled into a common pool available to all external networks. For each new call/session, the dynamic resource manager of the media gateway dynamically allocates a voice chip from the pooled voice processing resources, and assigns a logical resource identifier (e.g. a local IP and local UDP pair) to the session. When a network interface card receives incoming voice packets, it checks the destination IP and UDP and optionally the source IP and UDP to find out, and forward voice packets to, the voice chip assigned to the session.

Abstract: A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and assigning a unique wavelength to each RNC; identifying a packet to be transmitted between the RNCs located within a same sub-ring using the assigned unique wavelength, and transmitting the packet through an SRC (Sub-Ring Controller); connecting m number of SRCs to one main-ring where the “m” is a positive integer, and assigning a unique wavelength to each SRC; and detaching a wavelength identification code from the packet to be transmitted between the RNCs located within different sub-rings, and transmitting the packet having the encapsulated wavelength identification code through an MRC (Main-Ring Controller).

Abstract: A method for obtaining virtual path identifier, virtual channel identifier, and encapsulation values in an asynchronous transfer mode access device for a network using either non-static or static internet protocol address assignments and asynchronous transfer mode adaptation layer 5. In the non-static environment, a plurality of discovery packets are generated, but in the static environment, a plurality of address resolution protocol packets are generated. Headers are added to the plurality of packets, such that a first set of packets, each packet including a logical link control header, and a second set of packets, each packet including a virtual channel multiplexed header, are realized. The first and second sets of packets are encapsulated and then transmitted to a central office.

Abstract: Disclosed is an AAL2 (ATM (Asynchronous Transfer Mode) Adaptation Layer 2) switching apparatus. A cell deassembler for deassembling a payload of a received ATM cell into a CPS (Common Part Sublayer) packet, and generating a first VPC (Virtual Path Connection) by using the header of the ATM cell. A header converter for receiving the CPS packet from the cell deassembler and converting the first VPC into a second VPC by using a lookup table which have a number of VPCs and CIDs (Channel Identifiers) for changing the VPC. A cell assembler for receiving the CPS packet from the header converter, assembling an ATM cell which have the CPS packet and an ATM header generated from the second VPC.

Abstract: A multiplex transmission apparatus is provided that conducts traffic control and discards priority control of an ATM network for transferring IP packets having a plurality of QoS conditions. The multiplex transmission apparatus includes an intermediately generated packet generator configured to generate an intermediately generated packet having second header information “CID” based on first header information “DSCP” of the IP packet, a buffer storage configured to store the intermediately generated packet in any of transmission waiting buffers based on the second header information “CID”, an extractor configured to extract out the intermediately generated packet from the transmission waiting buffers according to the second header information “CID”, and an ATM cell transmitter configured to load an ATM cell with the intermediately generated packet taken out and transmitting the ATM cell to the ATM network.

Abstract: Processing transport format information to prevent MAC header redundancy, by providing a transmitting side that attaches one header to received data blocks, transmits the data blocks with the header attached thereto during one transmission interval on a data channel, and further transmits information about the size of each data block and the total size of the data blocks during a time interval corresponding to the transmission interval on a control channel, and by providing a receiving side that performs procedures corresponding to those of the transmitting side.

Abstract: A system for accessing the network is disclosed. The system includes a network communication device and a network terminal. The network communication device is coupled to the network for communicating with the network. The network communication device has a management module for outputting a network address information of the network communication device in response to a specific request. The network terminal is coupled to the network communication device for issuing the specific request to request the network address information of the network communication device and then utilizing the network address information of the network communication device to communicate with the network communication device for accessing the network.

Abstract: A system and method for AAL5 enhanced encapsulation is disclosed. The method, comprises receiving an AAL5 CPCS-SDU at a router; encapsulating the AAL5 CPCS-SDU into an AAL5 enhanced packet at the router; generating an MPLS packet from the AAL5 enhanced packet, wherein the AAL5 enhanced packet comprises an ATM header; and routing the MPLS packet over an MPLS network.

Abstract: A data transmitting and receiving device, which transmits and receives ATM cells between the calculation processing modules is described. The ATM-based data transmitting and receiving device includes a transmitting means and a data receiving means. The data receiving means includes a memory controller for controlling storage of successively received ATM cells in corresponding cell buffers, and a memory controlled by it. The memory includes a linked cell buffer, a free cell buffer identifier queue, a receiving state table and a receiving completion state queue. Accordingly, a separate device (e.g., ASIC chip) can be used to transmit and receive ATM cells instead of the conventional calculation processing module so that the transmission efficiency of the ATM cell can be increased and the load of the calculation processing device can be reduced.

Abstract: E-mail to which difference moving picture data is attached is transmitted from a mobile telephone for displaying difference moving pictures to a mail server. The mail server separates the difference moving picture data from the e-mail and transmits it to a moving picture converting server. The moving picture converting server converts the difference moving picture data to complete moving picture data and stores the complete moving picture data in a database. A URL link indicating the storage location in the database is generated by the mail server and transmitted to a mobile telephone for displaying complete moving pictures.

Abstract: In a telecommunications network, for establishing or modifying a radio connection a node (N1) prepares and sends an AAL2 signaling message (110) for use by a connection admission control function (106) of another node (N2) of the telecommunications network. In accordance with the present invention, the AAL2 signaling message includes a timescale value (112) which represents a timescale over which at least one bit rate value characterizing the radio connection is defined. Including the timescale value (112) in the AAL2 signaling message (110) facilitates more efficient connection admission control by enabling, e.g., bandwidth requirements of radio connections to take into consideration delay requirements. In an illustrated example embodiment, the timescale value (112) is a burst inter-arrival time (BIT) bit value which is a time which elapses between a beginning of two subsequent bursts of AAL2 CPS (Common Part Sublayer) packets.

Abstract: A switching fabric handles transactions using a protocol that directs packets based on path routing information. Components participate in transactions using a protocol that issues packets based on physical location of a destination device over the switching fabric, by establishing a virtual link partner relationship between the components.

Abstract: A traffic concentrator (40) aggregates traffic in a radio access network. The traffic concentrator comprises an Asynchronous Transfer Mode (ATM) switch (42) and a control node (44) associated with the ATM switch. The Asynchronous Transfer Mode (ATM) switch which performs a switching operation for switching unspecified bit rate (UBR) virtual channels (VCs) carrying user traffic between plural virtual paths (VPs). The user traffic is transported as ATM Adaptation Layer 2 (AAL2) connections over the unspecified bit rate (UBR) virtual channels (VCs). The control node is arranged to process AAL2 signaling messages which concern the AAL2 connections included in the VCs for which the ATM switch performs the switching operation. The AAL2 signaling messages are carried in virtual channels which do not carry the user traffic and which are either originated or terminated at the control node. In one example implementation, the traffic concentrator aggregates traffic of plural base stations of the radio access network.

Abstract: Transmission convergence sublayer circuit is coupled between a buffer and a deframer. The deframer submits a data stream enable signal and data bytes to the circuit. The data stream enable signal enables the circuit so that multiple groups of byte data belonging to a data cell are received and temporarily stored inside a byte-wise data pipeline. A header cyclic redundancy checker also receives the byte data and then conducts a header search. An idle cell identifier is used to determine if the data cell is a non-idle cell. When the header is found and determined to be a non-idle cell, a descrambler retrieves payload data of data cell from the byte-wise data pipeline and conducts a descrambling operation after obtaining a quantity of data equal to a double word. Ultimately, the double word data is output to the buffer with minimum delay.

Abstract: A PON system capable of utilizing the bandwidth of an optical transmission channel in the PON section. In a PON system including an OLT and a plurality of ONUs, the OLT has: a downstream frame processing unit that removes at least part of the header information in a layer 2 header from a downstream frame received from a wide area network, and converts the remaining frame portion into a frame having a header specific to the PON section; and a downstream frame processing unit that extracts a downstream frame portion to be transferred to a user terminal, from a received frame from a PON, and adds the layer 2 header information deleted in the OLT.

Abstract: The present invention provides an apparatus, system and method for transmitting asynchronous transfer mode (ATM) data cells on an ATM adaptation layer (AAL) configured connection within an ATM system comprising a digital signal processor (DSP) sub-system (160) and a host processor (190). The transmitter interfaces directly with the DSP sub-system (160) (which converts the digitized voice samples into voice signals) and the host processor (190) (which performs AAL2 signaling and layer management functions). The transmitter is configured to interleave AAL2 voice packets from the DSP sub-system (160) and signaling and management packets from the host processor (190) on an ATM connection. Data is fetched by DMA(s) (415). A channel look-up table uses the DSP assigned voice channel as an index into the table to map a voice channel to the ATM connection.

Abstract: A system and method of translating a set of transmission parameters related to a first transmission protocol from said first transmission protocol to a second transmission protocol for a data element being sent on a connection from a first communication network utilizing the first transmission protocol to a second communication network utilizing the second transmission protocol is provided. The method includes mapping a first parameter from the set of transmission parameters to a class of service value for the connection and mapping the class of service value and a second parameter from the set of transmission parameters to another parameter for the second transmission protocol.

Abstract: A data translation apparatus is between a base station using an Internet protocol (IP) and a cell controller using an asynchronous transfer mode (ATM) data in a mobile communication system.

Abstract: A band control system for a digital subscriber line network in which a first apparatus and a second apparatus situated at a subscriber station and a center, respectively, are interconnected by a cable for interchanging at least a digital data signal with each other. The system may cause one of the first apparatus or the second apparatus to monitor receipt of signals from the other of the first apparatus or the second apparatus; send, based on a result of monitoring, a band variation command to the other apparatus for causing the other apparatus to vary a band by using a frequency band not used for signal transfer; cause the other apparatus to receive the band variation command; and vary the band in accordance with the band variation command.

Abstract: The present invention relates generally to the transport of information between telecommunications nodes. In one aspect, in a telecommunication system having a first network based on a first technology and a second network based on a second technology, the second network in communication with the first network, the present invention relates to providing a message encoding format profile functionality adapted to enable transport of encoded information along at least a portion of a path of communication established between the networks, including: mapping the encoded information from a first message having a first message encoding format to a second message having a second message encoding format wherein the mapping is performed in accordance with the following steps: a) determining message User-to-User Indication information; b) determining message Length Indicator information and; c) selecting a message encoding format based on the determination of steps a) and b), above.

Abstract: An AAL2 path group (60) comprises plural AAL2 paths (35). Bandwidth of an individual AAL2 path comprising the AAL2 path group is contributed to a total bandwidth of the AAL2 path group rather than to the individual AAL2 path exclusively. An admission decision regarding a connection seeking to use an AAL2 path belonging to the AAL2 path group is based on available bandwidth of the AAL2 path group rather than available bandwidth of an individual AAL2 path. ATM VCCs which comprise the AAL2 path group are transported on a virtual path (VP) together with ATM VCCs of a different type (e.g., a second type which differs from a first type of ATM VCC which comprise the AAL2 path group). The AAL2 path group also features quality of service (QoS) separation, e.g., differing treatment for differing AAL2 connections within the AAL2 path group based on the QoS requirements for the differing AAL2 connections.

Abstract: An apparatus for and a method of generating pointers for identifying structure boundaries of data for leased lines such as T1/E1 in an asynchronous transfer mode (ATM) adaptation layer Type 1 (AAL1) through an ATM layer.

Abstract: A system and method for transporting a call having call signaling and voiceband user communications through an asynchronous transfer mode system identifies when compression, encryption, or another processing option has been applied to the voiceband user communications. A first signaling processor processes the call signaling to identify a selected first connection and a processing option, such as a compression method, to be applied to the voiceband user communications. The first signaling processor transports a control message to a first interworking unit identifying the selected connection and the selected compression method. The first interworking unit compresses the voiceband user communications with the selected compression method, sets a convergence sublayer indicator bit as an indicator in an asynchronous transfer mode cell, fills the cell with the compressed voiceband user communications, and transports the cell over the selected connection.

Abstract: Method and apparatus for lossless switchover in a redundant switch fabric improves the reliability and predictability of a cell reaching its destination without the cell being lost during switch-over through redundant switch fabrics. Ingress and egress buffers are disposed in input and output line cards to maintain the history of transmitted cells. When switch-over occurs, the cells transmission history is used to recover lost cells transparently and with minimal latency.

Abstract: An improved system and technique for processing a communications session in a data communications system suitably includes the steps of receiving the communications session at a line interface card, embedding the communications session into an asynchronous transfer mode (ATM) virtual circuit at the line interface card, transporting the virtual circuit from the line interface card to a processor card via a backplane. The processor card suitably extracts the communications session from the virtual circuit, and processes the communications session as appropriate.

Abstract: A voice transmission device has a tandem pass through function in an STM, ATM, IP network, and a noise canceller (21) is provided at a latter stage of an echo canceller (12) in a coding part, and in a case where a multistage connection state does not occur, noise removal is performed to carry out efficient coding, and in a case where a relay is performed in the multistage connection state, switching is performed to stop the operation of the noise canceller (21), and voice deterioration by redundant decoding and coding is prevented, and therefore, even in a cellular phone having no noise cancel function, or the like, and at both a normal time and a time of a tandem pass through state, high quality voice transmission can be performed, and further, since an unvoiced portion in voice data is increased by removing a noise component, a portion subjected to coding becomes small, and transmission amount of the line is reduced.

Abstract: An apparatus and a method for forwarding data packets through a fiber optic ring network includes forwarding data packets on a packet by packet basis. A node on the fiber optic ring network decides on a packet by packet basis whether to transmit on the working or protection path. Because this decision is being made on a packet level, reservation of throughput resources no longer is made at a one to one ratio. Rather, protection path resources are reserved at a ratio significantly less than one to one. In one embodiment, no resources are reserved for path restoration or protection path routing. Rather, quality of service provisioning is used to resolve interference situations wherein instantaneous demand exceeds capacity. A node evaluates ring conditions in relation to the demand of traffic resources and the relative quality of service ratings to determine whether and how to forward a packet.

Abstract: A loop carrier system includes a home local area network having plural telephone modules and a hub coupled to in-home telephone wiring. The telephone modules and the hub communicate voice signals over the in-home wiring in a dedicated frequency band above baseband POTS. The hub converts between voice signals and voice packets and is connected to a network access device for transferring the voice packets from the home local area network to a telecommunications network which routes the voice packets to a gateway. The gateway converts between the voice packets and a circuit format compatible with a local digital voice switch. The gateway includes an ATM switch and a call processing adjunct coupled to the ATM switch. The call processing adjunct controls the conversion between voice packets and the circuit format at the ATM switch. The call processing adjunct communicates with the home local area network using a first signaling protocol such as Media Gateway Control Protocol, Session Initiation Protocol or H.

Abstract: Example embodiments of protocol multiplexing systems comprise a multiplexer which receives multiplexed packet(s) and which uses contents of the multiplexed packets to form carrying packets which are stored in an output buffer. Some of the multiplexed packets belong to differing ones of plural virtual channels, but the multiplexer uses multiplexed packet(s) belonging to only one virtual channel to form a given carrying packet. The multiplexing systems accommodate transmission on a same virtual path of numerous connections belonging to differing virtual channels, balancing both payload efficiency and delay considerations.

Abstract: In the present communications system, communications terminals are connected via at least one hub unit and an exchange to a packet-based communications network. A timeslot-oriented data format, which is formed from a periodic sequence of channel-specific information segments, is provided for data transmission between the exchange and the communications terminals. In this case, information segments which are intended for transmission of signaling information, and information segments which are intended for transmission of user data information are transmitted in separate data packets which are intended for data transmission via the packet-oriented communications network.

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 network switch includes multiple interface cards and a backplane that interconnects the interface cards. The interface cards receive network traffic and perform time and line switching on the data. The network traffic can include a combination of time division multiplexed (TDM) data and network data (e.g., ATM cells, IP packets). In one embodiment, the channels that carry network traffic to the interface cards are pre-configured as either TDM channels or network channels. The channels are processed as appropriate for their respective types by the interface cards. Because both TDM and network traffic can be processed by a single interface card, the number of cards within the network switch can be reduced.

Abstract: A method for cross connecting an ATM network and a telecommunication switch includes receiving ATM cells from the ATM network at a packet sorter and extracting data packets comprising address data and payload data from the ATM cells. Translated addresses are generated based on the address data, and new data packets are created based on the payload data and the translated addresses to create new ATM cells with the new data packets. The new ATM cells are scheduled to be transmitted from the packet sorter to an ATM switch in compliance with an ATM service contract. The new ATM cells are forwarded from the ATM switch to at least one distributed SAR, which converts the new ATM cells into TDM signals and transmits the TDM signals from to the telecommunication switch via at least one TDM port.

Abstract: A multi-service network switch capable of providing multiple network services from a single platform. The switch incorporates a distributed packet forwarding architecture where each of the various cards is capable of making independent forwarding decisions. The switch further allows for dynamic resource management for dynamically assigning modem and ISDN resources to an incoming call. The switch may also include fault management features to guard against single points of failure within the switch. The switch further allows the partitioning of the switch into multiple virtual routers where each virtual router has its own set of resources and a routing table. Each virtual router is further partitioned into virtual private networks for further controlling access to the network. The switch's supports policy based routing where specific routing paths are selected based a domain name, a telephone number, and the like.

Abstract: An apparatus is described having an ATM switch core, wherein the ATM switch core has an input coupled to an ingress AAL2 switch engine and an output coupled to an egress AAL2 switch engine. The ingress AAL2 switch engine has a first look-up table that can store: 1) an identification label for an AAL2 virtual channel through said ATM switch core; and, 2) an AAL2 egress connection identification label for an ingress AAL2 packet to be carried by the AAL2 virtual channel. The egress AAL2 switch engine has a second look-up table that can store an egress CID and egress VPI/VCI for the AAL2 egress connection identification label.

Abstract: An illustrative intelligent network and method for providing voice telephony over ATM and alias addressing are provided that can provide significant advantages. The intelligent network includes a multi-service control point, an ATM signaling intercept processor, and a service administration. The multi-service control point receives an input extracted from an input ATM setup message that includes a called party phone number value and a VToA designator, and generates an alias ATM address of a called party CPE that corresponds to a network gateway in communication with a PSTN switch through a plurality of trunk lines and a desired trunk line of the plurality of trunk lines. The multi-service control point generates an output in response that will be used to generate an output ATM setup message that includes the alias ATM address.

Abstract: A switch or other processing element of a communication system is configured to detect automatically the particular version of an asynchronous transfer mode (ATM) user-network interface (UNI) protocol or other signaling protocol utilized by a customer premises equipment (CPE) device or other device coupled to the switch. The switch analyzes at least one message received in a signaling channel from the coupled device in order to determine the particular version of the protocol, and stores an indicator of the particular version of the protocol for use in subsequent interaction with the coupled device. Call processing functions of the switch may be reconfigured based at least in part on the determination of the particular protocol version.

Abstract: A system for switching variable size packets in a network is disclosed. The system comprises at least one ingress controller which receives a plurality of packets and which segments each of the packets into fixed sized fragments. The at least one ingress controller has a time-clock. The time clocks of all ingress controllers are synchronized to within a tolerance. Each fragment is tagged with at least a unique source of ID, time-stamp, and a fragment-number to form a cell. Each cell belongs to one packet having the same time-stamp value. The ingress controller sends each of the cells through a link such that a cell's destination is reachable through that link. The system includes a fabric element which receives cells from a plurality of inputs links. The cells are ordered. The fabric element sends ordered cells through a plurality of outputs and through which the destination of the cells is reachable.

Abstract: A method and apparatus for virtual application of features to electronic messages is disclosed. When a device applies a set of features to an electronic message, one or more of the features may be virtually applied instead of actually applied. For example, instead of encrypting a payload portion of a packet and adding an encryption header, the packet may not be encrypted. However, an appropriate encryption header may still be included in the packet such that the packet appears to have been encrypted when other features are applied. Prior to sending the packet, the payload portion is actually encrypted, such as by using a hardware accelerator. Some implementations may use a dual processor router, in which the input/output processor controls the hardware accelerator, the routing processor performs the virtual application of a feature, and prior to sending the packet the input/output processor actually applies the virtually applied feature.

Abstract: A method and system for transmitting traffic having disparate rate components includes receiving a plurality of traffic streams. Each traffic stream includes a first component and a reduced rate second component associated with the first component. The first components of the traffic streams are segmented into successive cells. The second components of the traffic streams are distributed between a defined set of the cells for in-band transmission of the second components.

Abstract: A VDSL service is provided to a subscriber over a twisted pair loop. An engineering operations channel (EOC) providing control functions is carried in AAL2 minicells. This facilitates multiplexing of messages associated with various network management layers over the EOC.

Abstract: This method applies to the transmission of information during a communication session, on a network having at least one switch, over at least one path between a so-called “source” node and a so-called “destination” node. The network is adapted to transmit data according to at least one connected mode and at least one non-connected mode. The session includes the transmission of at least one packet including on the one hand “user” data and on the other hand additional data defining notably the path on the said network which the said user data will follow. Each time a packet is received, the destination node performs: an operation of reading the said additional data (601), and an operation of determining the transmission mode (602), connected or non-connected, taking into account at least some of the said additional data.

Abstract: The present invention discloses an access device for supporting a variable data layer including: a user access processing module unit for receiving and processing an input command of a user, providing externally-received voice data to the user, and processing access to a local area network; a central control processing module unit for processing the voice data processed in or inputted to the user access processing module unit, and controlling processing units of the respective modules; and a wide area network access processing module unit for receiving data from the central control processing module unit, and performing a matching operation for a physical layer access. As a result, the access device supports the variable data layer, minimizes hardware variations due to variations of a physical layer access medium, and utilizes system hardware according to environmental variations of the physical access unit.

Abstract: Disclosed is an asynchronous transfer mode relating to a cell switching method, a cell format converter thereof, and a switching system thereof which are proper for switching an AAL2 ATM cell and an AAL5 ATM cell using an AAL2/AAL5 converter and an AAL5/AAL2 converter. Namely, AAL2 traffic may be switched at an AAL level using the AAL2/AAL5 and AAL5/AAL2 converters, so as to increase a system efficiency and provide a flexible interface between AAL2 and AAL5 protocol.

Abstract: In a voice interception system, a voice is intercepted by applying a function of a vocoder installed in a voice signal processor to a mobile switching station. This interception implies a conversion between an ATM cell of an AAL2pf, an AAL2, and an AAL1 (PCM), and a conversion between an ATM cell of an AAL2pf and an AAL1 (TFO) in a TFO case. The ATM cell of the AAL2 in the ATM network is picked up from an ATM switch and is intercepted. If a voice TFO CODEC method is used, the above functions are applied to a voice monitor and a voice signal, during a telephone call between mobile stations, is intercepted. It is possible with the disclosed invention to carry out a voice interception only by controlling the ATM switch without individual control of both the ATM switch and an STM switch.

Abstract: Upon receipt of a synchronization request from the CPU, the AAL1 device of the act system causes its cell forming section to extract the allocation position information for the SAR-PDU payload about a particular time slot in the current frame and, via the synchronization information send/receive section, transfers the information to the AAL1 device of the standby system. The AAL1 device of the standby system causes its operation processing section to calculate the allocation position of a particular time slot in the next frame for the SAR-PDU payload based on the above allocation position information. The AAL1 device of the standby system starts allocation of the data of and following a particular time slot of the next frame to the SAR-PDU payload starting from the position indicated by the calculation result.

Abstract: An apparatus and method for processing AAL2 supporting multiple virtual channels in a mobile communication system is disclosed. The present invention includes transmitting part including a first memory for storing ATM cells having the same destination according to corresponding destination information, where the transmitting part multiplexes user data items transmitted from a plurality of AAL2 users into one ATM cell according to corresponding destination information and transfers it to the ATM layer; and a receiving part including a second memory for storing mini-cells having destinations by users according to corresponding destination information, where the receiving part demultiplexes each ATM cell transmitted from the ATM layer to deconstruct it into mini-cells by users according to corresponding destinations and transmits them to corresponding AAL2 users. Accordingly, the accommodation capacity of the communication system increases and transmission rate rises, providing stable communication service.

Abstract: A communications system comprising device (e.g. an ATM physical layer (PHY)) and higher layer devices (e.g. an ATM layer and an AAL2 layer) are connected via a bus for communication of traffic therebetween, the bus comprising lines for carrying data and control signals. The bus supports data in ATM and AAL2 form and the devices discriminate between the two forms of data traffic. The data in AAL2 form typically comprises AAL2 mini-cells associated with identification of the source of destination of the mini-cells.