Abstract: Aspects of a method and system for channel estimation in a SM MIMO communication system may comprise receiving a plurality of spatially multiplexed communication signals from a plurality of transmit antennas. A plurality of baseband combined channel estimates based on phase rotation may be generated in response to the received plurality of spatially multiplexed communication signals. An estimate of the channel matrix may be determined based on the baseband combined channel estimates. A plurality of amplitude and phase correction signals may be generated in response to receiving the estimate of the channel matrix. An amplitude and a phase of at least a portion of the received plurality of spatially multiplexed communication signals may be adjusted based on the generated plurality of amplitude and phase correction signals, respectively.

Abstract: An active session mobility solution for point-to-point protocol (PPP) in accordance with the present invention provides fast and smooth handoff by reducing tunneling overhead on tunneling mechanisms, such as P-P tunneling from a serving Source (e.g., a PPP termination device) to a new serving Target (e.g., a PPP termination device). In the active session mobility solution of the present invention, PPP session can be migrated even if not all phases have been completed (e.g., LCP, PAP/CHAP completed but not IPCP and CCP). In such cases, the incomplete phases will be negotiated at the PPP of the Target PPP.

Abstract: Methods and systems for processing signals in a receiver are disclosed herein and may comprise receiving WCDMA signals via M receive antennas, tracking a plurality of received clusters within the received WCDMA signals, and estimating a complex phase and amplitude of a portion of each of the received clusters. A single cluster may comprise an aggregate of received WCDMA signal paths and (M-1) phase shifters may be utilized for the estimating of the complex phase. Complex waveforms, comprising in-phase (I) and quadrature (Q) components for the received clusters within the received WCDMA signals, may be processed. The processed complex waveforms comprising the in-phase and quadrature components may be filtered to a WCDMA baseband bandwidth. A phase and/or amplitude for at least one of the received WCDMA signals may be adjusted utilizing the estimated complex phase and amplitude. The phase and/or amplitude may be adjusted continuously and/or at discrete intervals.

Abstract: Methods and systems for processing signals in a receiver are disclosed herein and may comprise receiving spatially multiplexed signals via M receive antennas. A plurality of multiple data streams may be separated in the received spatially multiplexed signals to detect MIMO data streams. Each of the MIMO data streams may correspond to a spatially multiplexed input signal. Complex phase and/or amplitude may be estimated for each detected MIMO data streams utilizing (M-1) phase shifters. Complex waveforms, comprising in-phase (I) and quadrature (Q) components for the MIMO data streams within the received spatially multiplexed signals may be processed and the processed complex waveforms may be filtered to generate baseband bandwidth limited signals. Phase and/or amplitude for one or more received spatially multiplexed signals may be adjusted utilizing the estimated complex phase and amplitude. Phase and/or amplitude may be adjusted continuously and/or at discrete intervals.

Abstract: A method and an apparatus are provided for managing cell-by-cell demodulation timing of an asynchronous user equipment (UE) for demodulating multipath signals, received from a plurality of cells, in a plurality of fingers. Mapping information, indicating fingers mapped on a cell-by-cell basis, and demodulation information and demodulation timing information for the plurality of cells are acquired. The fingers are grouped on a cell-by-cell basis according to the mapping information. Demodulation information for an associated cell is provided to each of the grouped fingers. A signal received from the associated cell is demodulated in the grouped fingers by using the demodulation information for the associated cell.

Abstract: A method and an apparatus are disclosed for applying frequency layer convergence (FLC) to connected mode user equipments (UE) having no dedicated channel for a multimedia broadcast/multicast service (MBMS) service in a mobile communication system employing a Code Division Multiple Access (CDMA) scheme. The method and apparatus prevent uplink signaling congestion which may occur when the UEs located in non preferred frequency layers (NPL) of the MBMS service move to a preferred frequency layers (PL) when a MBMS service session starts. If the MBMS service session starts in a situation of applying the FLC, a radio network controller (RNC) notifies the UEs desiring to receive the MBMS service and located in NPLs for the MBMS service of FLC information including a PF value and a timer value, with reference to the number of the NPL UEs joining the MBMS service.

Abstract: A system and method for providing an iDEN user the ability to roam onto a peer iDEN Network. An iGW supports the passing of Dispatch registration information back to the users home network. The iGW will also support and assist in setting up Dispatch Calls between the two iDEN Networks, and vice versa. Exemplary embodiments of the present invention also support roaming from another technology that supports Dispatch Services (i.e., CDMA QChat and GSM PoC), where if a iDEN subscriber with a dual mode phone (i.e., iDEN & GSM), was to roam onto another carrier with a different technology but with Dispatch capabilities, the iDEN subscriber is able to register on the roaming carrier's network. The iGW is capable of receiving the registration update from the roaming network and updating the iDEN Network with the location of the iDEN Subscriber. If another iDEN Subscriber attempts a dispatch call to the roaming iDEN Subscriber, the iGW facilitates the Dispatch Call.

Abstract: A code power measurement device for measuring an interference level with respect to a desired code potentially used in a code division multiple access communication system includes an input, a correlating device, and a power measurement device. The input is configured to receive a signal corresponding to a received radio frequency spectrum potentially used by the desired code. The correlating device correlates the received signal with the desired code. The power measurement device measures a power level of the correlated signal.

Abstract: A radio communication system arranged to deliver multimedia information into a plurality of mobile stations is arranged to deliver the multimedia information according to the wave circumstances of each mobile station, layer the information components composing the multimedia information, create the frame containing the layered information components and the transmission priorities of the components, connect the frames on a multimedia information unit, and then transmit the connected frames to a base station.

Abstract: Improved throughput is provided in a spacecraft TDMA cellular communications system by introducing a standby state, in addition to the idle and transfer states, of the medium access control (MAC) protocol, which controls the transfer of data over the radio interface between the network and the user terminals. The terrestrial locations include mobile user terminals and gateways which provide connections to the land line telephone system and/or the land packet data network i.e. Internet service provider. Each of the terrestrial terminals and gateways include a MAC to control the transmitting and receiving of data between the gateway and user terminals. Since packet data is bursty, multiple transitions occur between the idle and transfer states during data transfers. The new standby state maintains synchronization, reducing the transition time to the data transfer state by comparison with the transition time from an idle state where the network does not maintain user synchronization.

Abstract: Apparatus and systems, as well as methods and articles, may operate to handshake with an operating system to indicate a network connection state at about the time a driver is initialized, or when a state of network disconnection is sensed. A wireless network connection may be opened at about the time a request from the operating system to utilize the network is received.

Abstract: A method for transmitting voice data traffic over a wireless medium using a decision process for the admission of a voice call, such as a call voice over Internet Protocol (VoIP) over a wireless local area network (WLAN). Admission of the call through the network is based upon the priority level of the call and a congestion level of the WLAN in order to increase the quality and the number of calls on a BSS. Paramters such as codec and packetization periods are selected for the call based upon the priority and congestion level. As the level of congestion in the network Increases, only calls above a certain Priority level are allowed into the network.

Abstract: A method, device, and computer program product for Session Initiation Protocol (SIP) communications is disclosed. The method, device, and computer program product allow a SIP user agent of a SIP-enabled device to register with a plurality of SIP registrars. The plurality of SIP registration may occur simultaneously or sequentially, based on preference information for the SIP registrars.

Abstract: A method and an apparatus in a first wireless station of a network transmitting to a second wireless station. The network uses multi-tone OFDM signals. The first station includes multiple antennas and a receive and a transmit signal path per antenna. Each receive signal path includes a discrete Fourier transformer determining the tones in a received signal, and each transmit signal path includes an inverse discrete Fourier transformer converting tones to a signal. The method includes determining channel estimates for each tone and each receive path while receiving from the second station, determining transmit weights to transmit to the second station, tone-by-tone weighting a signal for transmission to the second station to produce weighted tone sets for each transmit signal path, and transmitting the weighted tone sets. The first station is configured so that the weighting produces additive beamforming without the second station needing multiple antennas.

Abstract: Methods and systems for controlling a plurality of personal area network access devices are disclosed herein. Aspects of the method may comprise determining current roles for communicating complex Bluetooth® devices. In response to receiving a new connection, it may be determined whether to switch from at least one of the determined current roles based on stored role switching information. If a role switch is allowed, at least one new role may be switched based on the stored role switching information. Each of the determined current roles and the new role comprise a master only role, a slave only role, and/or “any” role, where the “any” role may comprise a master or slave role. If the “any” role is allowed, at least one of the master role and/or the slave role may be switched.

Abstract: A method modifies a Packet Data Protocol context during an IP session. The method includes activating a Packet Data Protocol context with a first Quality of Service setting by a user equipment. The method also includes detecting whether there is a changed demand for resources within the session. The method also includes modifying the packet data protocol context so that the first quality of service setting is changed into a second quality of service setting different from the first one. Each time a changed demand for resources within the session is detected, the second Quality of Service setting corresponds to the changed demand for resources.

Abstract: An authentication and network management system for Wi-Fi local area networks includes a network management device and a plurality of Wi-Fi local area networks coupled to the network management device. Each local network includes at least one access point device having a Wi-Fi radio. A plurality of end user devices are attachable to the network forming nodes thereof, and each end user device has input plugs, such as USB ports and the like, for coupling accessories thereto. An authentication device is provided in the network for authenticating the end user devices attached to the network. A plurality of authenticating keys is provided, with each key attachable to an input plug of an end user device. Each key contains a validation certificate therein, wherein the authentication device verifies the presence of a current validation certificate on a key coupled to the end users device prior to granting access to the network.

Abstract: In a RF communications system, aspects for single weight antenna system for HSDPA may comprise receiving HSDPA signals via a plurality of receive antennas and individually adjusting a phase of a portion of the received HSDPA signals via a single weight. The phase adjusted portion of the received HSDPA signals may be combined with at least one of the received HSDPA signals to generate combined HSDPA signals. At least one control signal may control the adjusting of the phase of the received HSDPA signals. Discrete phases may be communicated to adjust the phase of the portion of the received HSDPA signals, where the plurality of the discrete phases may range from zero radians to substantially 2? radians. Phase shift channel estimates may be generated during the identified time to determine the discrete phase. A desired phase may be generated from the phase shift channel estimates, and the single weight may be generated from the desired phase.

Abstract: Methods and apparatus are provided for varying the number of pilot tones in a multiple antenna communication system. Data is transmitted in a multiple antenna communication system by selecting a number of pilot tones to be employed to transmit the data; and transmitting an indication of the selected number of pilot tones in a preamble of a packet containing the data. Data is received in a multiple antenna communication system by receiving a preamble having an indication of a number of pilot tones embedded in the data; and processing the received data based on the indicated number of pilot tones. The indication of the selected number of pilot tones can be transmitted, for example, in a SIGNAL field of an exemplary IEEE 802.11 preamble. The number of pilot tones can be selected, for example, based on one or more of (i) a delay spread of a channel; (ii) the SNR at the receiver; or (iii) a number of antennas at a receiver.

Abstract: A system and method for avoiding collisions between packets transmitted in a wireless network (100). A first node (102, 106 or 107) in the wireless network (100) can transmit a packet to a second node (102, 106 or 107) in the wireless network (100), such that packet includes a header that is transmitted with a higher processing gain than the data, therefore, may be received and processed by a third node (102, 106 or 107. This allows the third node (102, 106 or 107) to detect the transmission of a packet by the first node (102, 106 or 107), which can cause the third node (102, 106 or 107) to avoid transmission of a packet during the transmission by the first node (102, 106 or 107) to avoid collision between the packets. The system and method further enables the nodes (102, 106 or 107) to determine whether they can transmit to another node (102, 106 or 107) based on estimates of interference conditions that can be experienced due to the presence of other nodes (102, 106 or 107).

Abstract: The present disclosure provides methods, systems, and apparatus for communicating with an electronic device. Particular disclosed embodiments provide a system that includes a peripheral communications adapter communicatingly connectable to an electronic device. The peripheral communications adapter includes a first communications interface, a second communications adapter communicatingly connectable with the electronic device, a memory, and a processor. The system also includes a controller in communications with the first communications interface. The controller includes a network adapter connectable to a network, a first communication port communicatingly connectable to the first communications interface, and a processor. The systems allows a remote user to monitor or control the electronic device over the network.

Abstract: A system and method in a radio access network (RAN) (100) consisting of wireless access points (APs) and (RR4, RR5, RR6, and RR7) mobile stations (MSs) (102) that proactively sets up a multicast distribution tree (101). An indication is detected at a destination AP (RR6). The indication is that an MS (102) operating at an initial AP (RR5) is a member of a multicast group. The indication is via a device operating in the RAN (100). Responsive to detecting the indicating, a multicast distribution tree (101) is established for the multicast group that includes the destination AP (RR6).

Abstract: Methods and apparatuses to selectively assign interlace preference factors to a plurality of user terminals to use a plurality of interlaces. These methods and apparatuses may improve capacity compared to a system that allows each user terminal to transmit data in every interlace.

Abstract: A system and method for reducing idle mode power consumption for mobile stations (MS) that have joined a Multimedia Broadcast/Multicast Service (MBMS) session and are waiting for the session to start. The invention is also directed to reducing the power consumption of an MS for which an MBMS session is inactive. In alternative aspects of the invention, the power consumption of mobile stations is reduced in the absence of ongoing MBMS session activity. Reduced power consumption is achieved by eliminating the need to read notification messages from an MBMS specific notification paging group when the notification message is for a different MBMS session than the paging group that the MS has currently joined.

Abstract: A CS searches in advance for information about unique words used by neighboring CSs to hold the information in a storage unit. When an LCH establishment request is made by a PS in the cell of the CS, it is confirmed whether or not there is an empty traffic slot. Further, with reference to the unique word information of the neighboring CSs of the same frequency and the same slot as the empty slot to be allocated, an unused unique word pattern is allocated.

Abstract: Method and apparatus relating to defining additional channels in an interprocessor communication system having broadcast and non-broadcast channels. A broadcast identifier may be sent on a channel defined to be non-broadcast, generating an additional broadcast channel outside the interprocessor communication protocol definition. Likewise a device-specific identifier may be sent on a channel defined to be a broadcast channel, generating an additional non-broadcast channel outside the interprocessor communication protocol definition.

Abstract: Provided are a system and method for providing wireless Internet mobile communication service. A channel allocator allocates a communication channel to an Internet mobile station when the Internet mobile station transmits a call requesting message to an Internet mobile switching center system or when the Internet mobile switching center system transmits the call requesting message to the Internet mobile station. An address allocator allocates a rental IP address to the Internet mobile station, transmits address allocation information of the Internet mobile station, withdraws the rental IP address from the Internet mobile station when mobile communication between the Internet mobile station and a counterpart Internet mobile station ends, and informs the Internet mobile switching center system of the withdrawal of the rental IP address.

Abstract: An error detection unit performs erasure decoding for physical layer packets and an assembler assembles the received data into higher layer packets. Higher layer packets that are incomplete are not erased if the higher layer packets contain some data indicated as valid by the error detection unit. In the case of incomplete packets, the data is labeled by assigning a value to a reliability attribute for the data to enable the decoder to discriminate between valid and invalid data in the same packet. The decoder is modified to use “dimmed” data from the incomplete packets to perform decoding.

Abstract: The invention relates to a method and device for synchronizing a receiver with a transmitter during a transmission of data over an asynchronous network. The data are transmitted in the form of data packets from the transmitter to the receiver via a transmission medium. An item of time information derived from a time base is inserted into the data packets. This item of time information contains information concerning the exact time at which a previously transmitted data packet was sent off. Inside the receiver, the time basis thereof is corrected by comparing the time information generated by the transmitter with an item of time information, which is generated in the receiver and temporarily stored therein.

Abstract: A method and apparatus for processing member containers of a virtual concatenation group at a source side of a member container transmission network to compensate for differential delay between the member containers.

Abstract: A network management method includes receiving network requirements of a network application/service of an entity. Thereafter, network resource capability is determined over a plurality of network providers to meet the received network requirements. Finally, network resources of at least one of the plurality of network providers are dynamically assigned to the network application/service, upon determining network capability over the plurality of network providers, to meet the received network requirements.

Abstract: A method for performing mode-agile communications during a communications session is disclosed. A communications terminal device supporting multiple modes of access is configured to determine when, during a session involving a first mode of access communications, a second mode of access is available and is to be used for subsequent communications for the session. The communications terminal device initiates or controls switchover from one mode of access to another.

Abstract: The present invention is directed to a system for and a method of selecting a combination of resources for transmitting data from a remote site to a destination site. The method comprises generating a list of combinations of resources at a regional site and transmitting the list to the remote site. Data is transmitted from the remote site to the regional site using each combination of resources and statistics for each transmission are stored. Metrics, based on the application at hand, are computed for each set of statistics corresponding to each transmission, and a preferred combination of resources is selected at the regional site based on the metrics. The regional site then transmits to the remote site information corresponding to the preferred combination of resources. The remote site is then configured to transmit data to the destination site using the selected combination of resources.

Abstract: A connection control apparatus includes a monitoring unit, a determining unit, a transferring unit, and a notifying unit. The monitoring unit monitors a status of a communication terminal. The determining unit determines, on a basis of a monitoring result, whether or not the communication terminal is able to respond to a connection request therefor. The transferring unit transfers the connection request to the communication terminal when the transferring unit has received a connection request for the communication terminal and the determining unit determines that the communication terminal is able to respond to the connection request. The notifying unit calls attention around the connection control apparatus when the determining unit determines that the communication terminal is unable to respond to the connection request after the transferring unit has received the connection request.

Abstract: A payload module (202) includes a payload subunit (212) coupled to the payload module, where the payload module has one of a 3U form factor, a 6U form factor and a 9U form factor. At least one multi-gigabit connector (218) is coupled to a rear edge (219) of the payload module and to the payload subunit, where the at least one multi-gigabit connector is coupled to communicatively interface the payload subunit to a backplane (204), where the backplane includes a switched fabric (206) coincident with at least one of a VMEbus network and a PCI network, and where the switched fabric and at least one of the VMEbus network and the PCI network are communicatively coupled with the payload subunit through the at least one multi-gigabit connector.

Abstract: An IP telephony apparatus provides simultaneous SIP communication for multiple IP phones and a method is proposed for the same. The IP telephony apparatus comprises a network connection port connected to a network; a plurality of telephone connection ports connected to a plurality of telephone sets; a voice codec unit connected to the telephone connection ports and used for converting a voice signal to a digital voice packet and for converting a digital voice packet to a voice signal; and an IP telephony allocation unit connected to the network connection port and the plurality of telephone connection ports. The IP telephony allocation unit creates an SIP control block containing an SIP call-leg for a local SIP number, and allocates the SIP control block to a destination telephone set according to the SIP call-leg, whereby the telephone sets have bi-directional digital voice packet transmission with a remote SIP number.

Abstract: Systems and methods are disclosed for serving VoIP emergency calls. In one embodiment, a call control entity is placed between PSAPs of an emergency services network and the IP network transporting VoIP calls. When the call control entity receives a VoIP emergency call and its associated user ID, the call control entity assigns a TDN to the emergency call and associates the assigned TDN to the user ID. The emergency call and the TDN are then extended to a PSAP to handle the emergency call. If the emergency call is disconnected from the PSAP, the PSAP operator is able to dial the TDN to provide a call-back function. The call control entity receives the call-back attempt to the TDN from the PSAP, identifies the user ID associated with the TDN, and routes the call-back attempt to the user ID to reestablish a call between the PSAP and the user.

Abstract: A method and system that enables IP (Internet Protocol)-like features on a conventional telephone that is connected to a device that handles voice calls on a network, such as a media gateway. The device sends messages concerning acknowledgement of call features, call status, call updates, and diagnostic or informative error information to the caller identification display on the conventional telephone.

Abstract: A method is provided for routing an emergency call from Customer Premises Equipment (CPE) to a Public Safety Answering Point (PSAP). The method includes: establishing a session over a packet-switched network (200) between a CPE (110) and a network node (302), such that the CPE (110) accesses a Public Switched Telephone Network (PSTN) (400) from the network node (302) via a telecommunications switch (500) associated with a first PSAP (320) serving a geographic region (300) different than where the CPE (110) is currently located; identifying a telephone number for a second PSAP (120) serving the geographic region (100) in which the CPE (110) is located; and, substituting the identified telephone number for a dialed telephone number when the dialed telephone number is indicative of an emergency call.

Abstract: A method and apparatus for providing useful packet data to a CALEA/Legal Intercept collection function. At an access point to a network such as the Internet, sources and destinations of data connections are examined to determine whether any of the bearer messages should also be routed to a CALEA/Legal Intercept monitoring system. If this condition is recognized, the bearer messages and corresponding signaling control messages are correlated in a call packet delivery application server and then delivered to a CALEA/Legal Intercept monitoring system. Advantageously, the monitoring receives as a bundled message set the bearer message and the control messages used to route and otherwise process these bearer messages.

Abstract: The multifunction peripheral, which is the information processing apparatus, sends inquiries to the management apparatus of the setup location (hotspot) about the available services on the network. In response to this inquiry, the management apparatus notifies the multifunction peripheral of the available services, and the operation buttons for functions realized using the network services which were indicated to be unavailable by the notification are not displayed or grayed out by the multifunction peripheral and user selection operation for these functions is made impossible.

Abstract: An adapter is disclosed which allows attachment of a standard telephone to a computer as a standard peripheral. The adapter converts analog signals of the telephone to digital signals of the computer and vice versa. The adapter can also be a stand-alone device allowing the telephone to be attached to a computer network. The adapter, in this case, contains the computing power to support the necessary data network protocols, and PSTN signaling protocols. In this way voice communication is enabled over a computer network without requiring the computers to be equipped with sound cards.

Abstract: A source IP telephone apparatus obtains, from an ENUM server, NAPTR records of a call destination based on a telephone number of the call destination, the telephone number being input by dialing. The source IP telephone apparatus then selects, from the obtained NAPTR records, a NAPTR record to be used for transmitting a call, based on a priority order, and transmits a call to the call destination based on an access method and a destination number included in the selected NAPTR record. When a destination IP telephone apparatus is busy, the second priority NAPTR record is selected and another call is made by automatically switching the access method.

Abstract: Described are methods and apparatus, including computer program products, for hierarchically organizing logical trunk groups in a packet-based network. A first hierarchical group includes a first logical trunk group that is associated with a first trunk resource parameter. The first hierarchical group is associated with a group resource parameter, a portion of which is based on the trunk resource parameter. Data associated with a telephone call is associated with a logical trunk group. Transmission of the data through a packet-based network is based in part on the group resource parameter.

Abstract: Described are methods and apparatus, including computer program products, for defining logical trunk groups in a packet-based network. A plurality of logical trunk groups are defined for a first media gateway in communication with a packet-based network. Each of the plurality of logical trunk groups is associated with one or more media gateways in communication over the packet-based network with the first media gateway. Data associated with a call that is received or transmitted by the media gateway is associated with a first logical trunk group of the plurality of logical trunk groups.

Abstract: A system and method for providing prognosticator performance verification to a subscriber includes a server, which receives allocation change signals from a plurality of prognosticators, and each allocation change is associated with an asset class. The allocation changes are processed by the server by attaching a time-date stamp on each and storing the allocation changes in a database in electronic communication with the server. The server, in response to subscriber request, executes a report module resident in its memory. The report module accesses the allocation changes in the database, and with the allocation changes, generates a allocation change performance report, called a medallion report. The medallion report displays, in chart form, a plurality of signal asset classes using a plurality of chart parameters, the defaults for which are set by a prognosticator. The report module may verify the authenticity of the time-date stamps. Finally, the server sends the medallion report to the subscriber.

Abstract: The invention comprises a method and apparatus for providing at least one network endpoint of an enterprise customer network access to at least one dialing plan. Specifically, the method comprises receiving at least one dialing plan request from the at least one network endpoint, retrieving at least one address mapping in response to the at least one dialing plan request, and responding to the at least one dialing plan request using the at least one address mapping.

Abstract: A method and a device for determining the system load of a processor system. The processor system transmits a process status via an interface, an active process status indicating that an active process is being executed. The active process status is transmitted to a protocol device. The protocol device records a first time interval, a first time interval corresponding to a time interval for which an active process status exists. The protocol device determines a system load existing within a monitoring period by relating the first time intervals which were recorded within this monitoring period to the duration of the monitoring period.

Abstract: A process for secure distribution of original digital audiovisual streams including audio, video components or other data, including packetizing the original stream into packets that can be manipulated and have a flexible size, wherein each packet includes a header containing information about the packet and a useful load including part of the data of the stream, analyzing the packetized stream prior to transmission to client equipment to generate a main stream in conformity with a packetized format of the original stream, modified in that all or part of the packets were substituted by packets of the same structure, but whose content was modified, and generating complementary information with any format suitable to permit reconstruction of the original stream, and separately transmitting the modified main stream and complementary information generated from the server to addressed equipment.

Abstract: Multistage switching for mixed SONET VT traffic, such as VT1.5s and VT2s, is accomplished by employing an input time switch, a space switch and an output time switch. The input time switch and output time switch include VT1.5 time switches arranged to alter the time order of the input VT1.5s and VT2 time switches arranged to alter the time order to the input VT2s. The space switch includes a VT1.5 space switch arranged to order the input VT1.5s with respect to output channels in an output channel order different from the input channel order of the VT1.5s. The space switch also includes a VT2 space switch arranged to order the input VT2s with respect to output channels in an output channel order different from the input channel order of the VT2s.