Abstract: A data transmission device for executing data transmission in environments where the noise level changes periodically minimizes delay of fast data. A multiplexing/synchronization control section receives data (in which the ratio between fast data and interleave data is fixed) which are supplied from an upper layer device at a prespecified data rate, and separates the data into fast data and interleave data. The fast data is supplied to a tone ordering section without changing its data rate. Meanwhile, an interleaving section executes interleaving to the interleave data, and a rate converter controls the data rate of the interleave data and supplies the interleave data to the tone ordering section.

Abstract: An apparatus, system, and method for enabling multi-frequency communication over a telephone network having a billing/tax tone are disclosed. The apparatus comprises a connection port operable to couple to a telephone network. An output port is coupled to the input port, and is operable to couple to a high frequency device. A trap is coupled between the connection port and the output port. The trap is tuned to isolate the high frequency device from the telephone network at a specified frequency range.

Abstract: A method of applying one of several resource distribution algorithms to an incoming call to a communication system. The applied resource distribution algorithm is based on resource parameters obtained from a main scheduler of the communication system. Some of the resource parameters include the type of call, the resource usage and the resource allocation scheme. The resource parameters generally describe the amount of resources that are currently being used by the system and which resources are available to the incoming call. The method of the present invention admits the incoming call to the communication system in accordance with one of the resource distribution allocation schemes. In this manner, the resources of the communication system can be efficiently and fairly distributed to different types of users requesting admission to the communication system.

Abstract: The present invention relates to an ambient field level monitor device for a radio mobile terminal, comprising a reception unit for receiving a radio signal arriving at the radio mobile terminal to output a reception signal originating from the received radio signal and further to output an ambient field level signal, a synchronization decision section for receiving the reception signal from the reception unit to judge whether or not the reception unit is in synchronism with the received radio signal, and a time constant variable type ambient field level monitoring unit for receiving the ambient field level signal from the reception unit.

Abstract: A voice enabled public access Internet workstation including an improved method of transporting voice over Internet protocol is disclosed. Using one connection to the Internet, voice packets are prioritized through the use of a router and sent via a private managed network faster, minimizing packet delay and loss. The voice packets can be sent to any point of presence in the United States or the rest of the world by a gateway and gatekeeper recognizing a specific static IP address and allowing the voice packets to terminate in a global scale via Voice over Internet Protocol carriers national and or international set of gateways, or the Public Switching Telephone Network, depending upon the route codes of the Voice over Internet Protocol. These carriers never reach the public Internet domain, allowing good quality transmission with limitation on packet loss to be sent to any destination telephone in the world.

Abstract: A communication apparatus and method includes a modem operable for connection to a telephone line, a voice receiving interface apparatus for use in receiving voice signals from a local user, and a voice conveying interface apparatus for use in conveying voice signals to the local user. Further, processing circuitry, operable under control of a graphical user interface program executable on a personal computer, may be, for example, operable to convert received voice signals from the local user via the voice receiving interface apparatus into outgoing digital voice information, compress the outgoing digital voice information into compressed outgoing digital voice information, and packetize the compressed outgoing digital voice information and provide outgoing packets based thereon. Each of the outgoing packets includes at least one header.

Abstract: A multiplexing/synchronization control section receives data (in which the ratio between fast data and interleave data is fixed) which are supplied from an upper layer device at a prespecified data rate, and separates the data into fast data and interleave data. An interleaving section executes interleaving to the interleave data. The fast data and the interleave data, whose data rates have been controlled by a fast data rate converter and an interleave data rate converter respectively, are supplied to a tone ordering section to be assigned to carriers of a symbol (frame). In the case where the amount of data which can be assigned to each NEXT symbol is larger than or equal to a “specific amount” which corresponds to the fixed data rate of the fast data supplied from the upper layer device, the tone ordering section assigns fast data of the “specific amount” to each symbol regardless of whether the symbol is a FEXT symbol or a NEXT symbol.

Abstract: A device for combining voice and data into a single T1 line performs the functions of a channel bank, IP gateway, multiplexer, and firewall. The device includes automatic configuration capability which allows the device to be automatically and remotely provisioned, including automatically determining the allocation of voice and data DS0s. Automatic configuration allows installation of the device at a user site by non-data-centric technicians and without the need for pre-installation staging to configure the device.

Abstract: A telephone system connects to a plain old telephone service (POTS) line and includes a modem connected to the POTS line. A telephone transceiver and a data device are coupled to the modem to provide a simultaneous two-way data and voice exchange over the POTS line by detecting data for transfer and allocating bandwidth between voice and data signals to accommodate the exchange.

Abstract: A communication system and method for supporting both POTS and high speed data services between a remote CPE interface, located at a subscriber premises, and a central office. An analog to digital converter transforms an analog POTS signal to a digital POTS signal, and a combiner circuit combines the digital POTS signal with a high speed data signal into a combined digital signal which preferably has a single communication spectrum. A power detector identifies a power failure at the remote CPE interface, and a life line communication path is established from the central office to the remote CPE interface in response to the power failure.

Abstract: A telecommunications system includes a packet network; a plurality of VoIP endpoints; and a plurality of VoIP feature servers. The VoIP endpoints are able to send configuration request messages to the feature servers. The feature servers respond with information indicative of supported features. The VoIP endpoints can then update the system configurations based on the response information. Further, newly added feature servers transmit feature availability messages to endpoints when initially installed. The endpoints then respond to configure themselves appropriately.

Abstract: A method, and a radio transmitter using the method, is disclosed for scheduling air interface capacity between user services in a radio system. The method includes defining a nominal service bit rate, a nominal capacity of the service, and an effective coding rate of the service, and scheduling air interface frame capacity between at least two different services. The scheduling includes computing the bit rate of a first service by multiplying the nominal capacity of the first service by the effective coding rate of the first service, and adding to this normal bit rate of the first service borrowed extra capacity of at least one other service, the bit rate obtained from the extra capacity computed by multiplying a predetermined amount of the nominal capacity of the other service by the effective coding rate of the first service.

Abstract: The present invention is a process in which broadcasters can supplement existing multimedia streams such as video and audio with additional multimedia streams in a coordinated and integrated way, allowing users, after reception of the broadcast stream, to select which substream to use, without requiring an upstream channel to communicate this user preference back to the server or any additional bandwidth to broadcast these additional streams.

Abstract: A controller for residential telephone wiring. Apparatus associated with the controller provides multiple communication channels on ordinary residential telephone wiring. The controller (1) routes incoming calls to a selected telephonic device within the residence, (2) routes outgoing calls to a free external line servicing the residence, and (3) routes calls within the residence from one telephonic device to another.

Abstract: A digital broadcast receiving method, in which a digital broadcast signal, including layers each obtained by dividing a transmission bandwidth into a plurality of segments and combining some of the segments, is received, and images and/or sound are output from one of the layers constituting the received digital signal. The digital broadcast receiving method includes detecting a field strength and/or detecting a reproduction condition of each layer of the received digital broadcast signal, determining which layer to output based on the detected field strength and/or the detected reproduction condition, and switching the output layer to the determined layer based on a broadcasting format, for each layer, of each broadcast station.

Abstract: A method for rapid noise reduction from a splitterless ADSL modem. The modem stores a value for the power level of its transmitter in a table along with transmission characteristics of the telephone loop. The stored value for its power level is the power level that was previously successful with the transmission characteristics in achieving the Showtime data transfer mode. When the modem measures similar transmission characteristics of the telephone loop, such as a slope of the frequency response of the loop, a power level that would suppress downstream noise, or the dc voltage of the loop, the modem searches the table for matching transmission characteristics. If the table contains a table entry that matches these measured transmission to characteristics, the modem restores the stored transmitter power of the modem. In this manner, the modem may rapidly achieve Showtime because it is restoring a transmitter power level that was previously successful under the same condition of the telephone loop.

Abstract: A high-speed data transmission network system (8) is provided. The system (8) includes a plurality of subscriber premises (12) that transmit a first upstream signal (28) on a first frequency band to a central office or a remote terminal (10), which is in communication with the plurality of subscriber premises (12). The central office or the remote terminal (10) broadcasts a downstream signal (30) to each of the plurality of subscriber premises (12) on a second frequency band, which is higher in frequency than said first frequency band. The downstream signal (30) contains one or more subscriber group signals and a plurality of subscriber specific signals. A controller (44) provides each of the subscriber premises (12) access to one or more of the one or more subscriber group signals and to a corresponding subscriber specific signal of the plurality of subscriber specific signals. A method of performing the same is also provided.

Abstract: A system and method for providing Value-Added Services (VAS) in an integrated telecommunications network having a packet-switched network portion (PSN) operable with Session Initiation Protocol (SIP). The integrated telecommunications network includes a SIPext SSP server, a trigger server, and a service node having a Service Logic Program (SLP) that is operable with Intelligent Network Application Protocol (INAP). The SIPext SSP and service nodes are provided with the capability to communicate using SIP-compliant messaging. New header fields are provided that specify operations to be performed by the service node with respect to a service. INAP service parametric data is also provided in the header fields in a sequential form. When a call is received in the SIPext SSP server for a user having a subscription for a VAS, it queries the user profile stored in the trigger server.

Abstract: To secure an ADSL connection to an ADSL transceiver connected to a telephone line to be used also by an associated telephone, the telephone is normally kept disconnected from the telephone line and a predetermined number of bits is allocated to the ADSL connection. Upon an off-hook condition of the telephone in connection with an outgoing call, and upon a presence of a ringing signal on the telephone line or an off-hook condition of the telephone in connection with an incoming call, a predetermined lower number of bits is allocated to the ADSL connection before the telephone is connected to the telephone line.

Abstract: The multiplexer device comprises a multiplexing means for multiplexing a plurality types of media information and outputting a multiplexed bit stream, a priority deciding means for deciding priority corresponding to each of the media information, and a multiplexing controller for controlling multiplexing of each of the media information according to the multiplexing means based on the priority decided by the priority deciding means. In addition the priority in each information is multiplexed.

Abstract: A telecommunication network with a local multi-interfacing multiport switch with a remotely controllable line multi-interface for alternatively, selectively, connecting different line unit interfaces to a single customer line to enable both digital and analog communication on a single line.

Abstract: A data transmission and distribution system that includes a transmitter and a receiver. The transmitter transmits a count value associated with a data clock of the transmitter to the receiver over an asynchronous link as part of an information payload that also includes audio or video information. The data clock is synchronously recreated at the receiver using only a system clock associated with the receiver and the transmitted count value.

Abstract: A method and apparatus are provided for determining a suitable inter-packet gap (IPG), or a suitable extension to be added to a default IPG as a packet is processed. The apparatus includes an adder to add an incremental measure of a packet to an existing measure and produce a new measure (e.g., in bytes). The apparatus further includes a comparator which, if the new measure exceeds a programmable threshold (e.g., a stretch ratio), issues a signal to increase the IPG and decreases the new measure by the threshold. The current measure is then stored (e.g., in a register) for addition to the next incremental measure. A counter tracks the number of signals received before the end of the packet, at which time the total is forwarded to a component configured to insert or apply the IPG and the counter is reset for the next packet.

Abstract: An Integrated Voice/Data System on a Single RF Channel for broadcast applications such as Mobile Data Terminal (MDT), Automatic Vehicle Location (AVL), and mobile facsimile (fax) in the frequency region range of 450 MHz to 800 MHz on 25 kHz radio frequency (RF) channels. The system utilizes a dynamic multiplexing technique referred to as Packetized Data/Voice Dedicated (PDVD) Burst Switching, and Lookahead (a digital signal process). PDVD allows transmission of data within silence gaps inherent in speech. Lookahead provides data sources with advanced knowledge of channel(s) where the silence gaps will occur The Integrated Voice/Data System may be retrofitted into existing 450 MHz-800 MHz public and private land mobile radio channels to provide users with full data services and triples voice capacity.

Abstract: In accordance with one aspect of the invention, an apparatus is provided for facilitating combined xDSL and POTS communication across a two wire pair. The apparatus includes a first communication port for communication with a central office across a two wire pair, and a second communication port for communication with a customer premises across a two wire pair. A splitter, or tap, is disposed at the first communication port for splitting a combined xDSL and POTS signal into a first and second signal path. A low pass filter is disposed in the first signal path for filtering the xDSL signal from the combined signal in the first signal path, leaving only the low-frequency (POTS frequency) signals. A circuit is disposed in the second signal path that is configured to filter the POTS signal from the combined signal, leaving only the xDSL signal.

Abstract: Systems and methods by which voice/data communications may occur in multiple modes/protocols are disclosed. In particular, systems and methods are provided for multiple native mode/protocol voice and data transmissions and receptions with a computing system having a multi-bus structure, including, for example, a TDM bus and a packet bus, and multi-protocol framing engines. Such systems preferably include subsystem functions such as PBX, voice mail and other telephony functions, LAN hub and data router. In preferred embodiments, a TDM bus and a packet bus are intelligently bridged and managed, thereby enabling such multiple mode/protocol voice and data transmissions to be intelligently managed and controlled with a single, integrated system. A computer or other processor includes a local area network controller, which provides routing and hub(s) for one or more packet networks. The computer also is coupled to a buffer/framer, which serves to frame/deframe data to/from the computer from TDM bus.

Abstract: A method for transmitting and receiving leased line data, an apparatus for transmitting leased line data, and an apparatus for receiving leased line data are provided. The method includes storing received leased line data in a FIFO; packing the leased line date stored in the FIFO into the payload of a DSL frame; and transmitting the packed DSL frame. According to the method, leased line data can be transparently transmitted by adding minimum function blocks to the DSL modem, and with the simple circuit structure, the blocks can be integrated into one chip such that no additional external circuits are needed and a low-priced DSL modem chip that can transmit leased line data can be implemented.

Abstract: Method and apparatus for sending and displaying short messages from data network users which are linked to a telephonic network. The telephonic network comprises telephones, each with a display for visually displaying short messages to subscribers of the telephonic network. The apparatus holds a dialogue between the data network users and a software agent embedded in the telephonic network. The dialogue provides the telephonic network the content, the sender ID and the address information of each short message, stores the content and address information in a database, and displays the content of the messages on the telephone display of each destined subscriber.

Abstract: In a method for linking a digital description of a traffic route network to at least one additional digital description of a traffic route network and a location database with a link to at least one additional location database, it is provided that records of the locations which have at least one adjacent location in at least one of the additional descriptions of traffic route networks and/or location databases have at least one reference to at least one such adjoining location.

Abstract: A cable modem with a function of packetizing voice information and transmitting/receiving the packetized voice information includes an interface for connection to an ISDN (Integrated Services Digital Network) telephone, a connection control unit which executes a connection control for the ISDN telephone connected via the interface, and a VoIP control unit which executes a VoIP-related protocol process for a voice call by the ISDN telephone that is connection-controlled by the connection control unit.

Abstract: A data processing method includes, at an external computer, originating a ready control signal and, at a host, receiving the ready control signal. In response to the ready control signal, a control signal is produced by the host. In response to the control signal, a switch selectively couples one of the host and the first computer to a telecommunication device.

Abstract: In one embodiment, a method for providing voice and data service includes receiving voice telephone signals and data signals, and transmitting packets in a single protocol link layer over a subscriber line in response to the received telephone signals and the received data signals. The method also includes receiving packets in a single protocol link layer over the subscriber line, and transmitting data signals and voice telephone signals in response to the packets received from the subscriber line. In one embodiment, a network node and a network terminal unit communicate voice telephone signals and data signals by communicating packets in a single protocol link layer over a subscriber line. In another embodiment a first network node communicates voice telephone signals and data signals with a second network node by communicating packets in a single protocol link layer.

Abstract: A signal processing system which discriminates between voice signals and data signals modulated by a voiceband carrier. The signal processing system includes a voice exchange, a data exchange and a call discriminator. The voice exchange is capable of exchanging voice signals between a switched circuit network and a packet based network. The signal processing system also includes a data exchange capable of exchanging data signals modulated by a voiceband carrier on the switched circuit network with unmodulated data signal packets on the packet based network. The data exchange is performed by demodulating data signals from the switched circuit network for transmission on the packet based network, and modulating data signal packets from the packet based network for transmission on the switched circuit network. The call discriminator is used to selectively enable the voice exchange and data exchange.

Abstract: Systems and methods for correcting phase ambiguity in a total pilot phase value are presented. Examples include comparing and correcting total pilot phase values having different pilot frequencies within the same sampling interval, such as the same data symbol. Another example includes correcting a total pilot phase value for one sampling interval and corresponding to one pilot frequency using nonlinear filtering of values of the total pilot phase for prior sampling intervals at the same pilot frequency.

Abstract: A wireless mobile station transmits a request to a Platform for Privacy Preferences (P3P) Web site for an XML version of the site's privacy policy. If the mobile station's user preferences are set to audio, the mobile station transmits a request to the Web site for the natural language version of the privacy policy in audio format. The Web site responds with the audio version of the privacy policy.

Abstract: An ATM communications device connected to an ATM network via an optical fiber improving the efficiency of the traffic in the ATM by separating the real-time data communication system and non real-time data communication system. A CPU bus (or a PCI bus) and a real-time signal bus are connected to an MPEG decoder and an MPEG encoder as real-time data processing devices. The CPU bus is connected to a CPU 18 and a memory 19 as non real-time data processing devices. The ATM communications device includes an optical link, a physical layer device, and an SAR (segmentation and reassembly) devices, carries out processing for communication of real-time data such as a video signal between the ATM network and the real-time signal bus, and carries out processing for communication of non real-time data such as computer information between the ATM network and the CPU bus.

Abstract: A local area network of devices connected to a Communication Switching Module (CSM) carry both delay-sensitive information and non-delay sensitive user data in master Ethernet packets transmitted over the LAN at a constant rate. Signaling and control information from the devices initialize a permanent virtual connection (PVC) between devices and the CSM. The signaling and control information is contained in standard Ethernet packets which are encapsulated along with non-delay sensitive data in the master Ethernet packets and performs various control functions for the LAN devices and the CSM.

Abstract: A two-wire field-mounted process device with multiple isolated channels includes a channel that can be an input channel or an output channel. The given input or output channel can couple to multiple sensors or actuators, respectively. The process device is wholly powered by the two-wire process control loop. The process device includes a controller adapted to measure one or more characteristics of sensors coupled to an input channel and to control actuators coupled to an output channel. The controller can be further adapted to execute a user generated control algorithm relating process input information with process output commands. The process device also includes a loop communicator that is adapted to communicate over the two-wire loop.

Abstract: Delay-sensitive information (e.g., voice, video) and non-delay-sensitive user data are combined and transmitted over a single UTP cable forming part of a star-connected Ethernet local area network. Master Ethernet packets of fixed length are formatted with fixed length portions assigned to the two types of information and transmitted at a constant fixed rate. The delay sensitive information is extracted, switched and transmitted at a constant bit rate. The non-delay sensitive information is segmented and transmitted asynchronously in a user data portion of the Master Ethernet Packet.

Abstract: In a CDMA based wireless digital communications system, a CDMA communications station. A CDMA communications station includes a signal encoder adapted to encode signaling information into a signaling packet. A voice encoder is also included to encode voice information at a variable data rate and process the voice information into a voice packet. A multiplexer is coupled to receive the voice packet from the voice encoder and coupled to receive the signaling packet from the signal encoder. The multiplexer combines the voice packet and the signaling packet into a traffic frame. A transmitter is coupled to the multiplexer for transmitting the traffic frame as received from the multiplexer. The multiplexer is further coupled to receive an early data rate indication from the voice encoder such that the multiplexer is able to preconfigure the traffic frame for the variable data rate voice packet to be delivered once the processing of the voice encoder is complete.

Abstract: In a CDMA based wireless digital communications system, a CDMA communications station. The CDMA communications station includes a signal encoder adapted to encode signaling information into a series of signaling packets, wherein the signal encoder process the signal information into variable size signaling packets in accordance with an amount of the signaling information. A voice encoder is included in the station and is adapted to encode voice information and process the voice information into a series of voice packets, wherein the voice encoder processes the voice information into variable size voice packets in accordance with an amount of the voice information. A multiplexer is included in the station wherein the multiplexer is coupled to receive the voice packets and coupled to receive the signaling packets and for combining the voice packets and the signaling packets into a traffic frame. A transmitter is coupled to the multiplexer for transmitting the traffic frame as received from the multiplexer.

Abstract: Line termination units having dual ports for accepting communication traffic of two different types facilitate the concurrent transmission of voice traffic, serial data traffic and packetized data traffic across a telecommunication transport system, such as a DSL (digital subscriber line) system. The bandwidth of the telecommunication transport system is allocated between the differing traffic types to permit the full utilization of the available bandwidth.

Abstract: The present invention relates to an ambient field level monitor device for a radio mobile terminal, comprising a reception unit for receiving a radio signal arriving at the radio mobile terminal to output a reception signal originating from the received radio signal and further to output an ambient field level signal, a synchronization decision section for receiving the reception signal from the reception unit to judge whether or not the reception unit is in synchronism with the received radio signal, and a time constant variable type ambient field level monitoring unit for receiving the ambient field level signal from the reception unit.

Abstract: A quality of service (QOS) server gathers information in relation to transport introduced delays and obliterations of so called real-time protocol (RTP) signal streams which are used to packetize signals of synchronous signals origins, for example origins such as telephones and raster scan apparatus, for transport via the IP network. The QOS server is able to provide recently gathered QOS information about a requested call, apriori the actual call set up. In an example of a PBX call centre, an automatic dialler is coupled with a QOS server and in relation to endpoint and route selected data, determines if an IP telephony call should proceed, contingent upon the probable QOS being sufficient, before a call controller initiates a call set up.

Abstract: An Internet Protocol telephony exchange system and a call control method thereof. The exchange system integrates an IP terminal and a legacy terminal in a single exchange system, controls a call of the IP terminal in the same manner as an extension subscriber, and contains at least one IP terminal connected to the IP network. The IP terminal contains a user interface for generating user information or converting received user interface information into information of a user-identifiable state, and performs a VoIP function in compliance with one or more of a H.323, a MGCP and an SIP protocol procedure. The IP network is connected to an IP driver and an IP-PBX (Internet Protocol-Private Branch Exchange). The IP driver controls an IP end point at which the IP terminals are positioned, upon receiving IP terminal connection information and call control information based on H.323/MGCP/SIP protocol procedure.

Abstract: A method of signaling including the steps of providing a first Internet end station, providing a second Internet end station, establishing a Plain Old Telephone network connection between the first Internet end station and the second Internet end station, exchanging an Internet item between the first Internet end station and the second Internet end station using the POT network connection, disconnecting the POT network connection between the first Internet end station and the second Internet end station, establishing an Internet connection between the first Internet end station and an Internet network, establishing an Internet connection between the second Internet end station and the Internet network, exchanging a first dynamic Internet address of the first Internet end station with a second dynamic Internet address of the second Internet end station, establishing an end to end Internet connection between the first Internet end station and the second Internet end station using dynamically assigned IP address

Abstract: In an arrangement for securing an ADSL connection to an ADSL transceiver connected together with a telephone to a common telephone line; there are devices for setting a first number and a second, lower number, respectively, of bits to be allocated to the ADSL connection. Moreover, there are devices for detecting whether or not a ringing signal is present on the line and whether the telephone is in the off-hook or the on-hook condition. The first number of bits is allocated when neither the ringing signal nor the off-hook condition is detected, and the second, lower number of bits is allocated when the ringing signal and/or the off-hook condition is detected.

Abstract: A twisted pair and/or coaxial cable fed, integrated residence gateway controlled set-top device provides a plurality of services. One service is lifeline service which may be provided over the coaxial cable via a cable modem of the integrated residence gateway or over the twisted pair facility. An integrated residence gateway is coupled to either or both of the coaxial cable or twisted pair and distributes the bandwidth facilities available over either service vehicle to customer devices including a set top box. A network service platform (NSP) is coupled to a cable facilities management platform (FNP) for providing services for cable television subscribers as well as telecommunication service subscribers such that an interexchange or telephone company would control the network services to the subscribers. The NSP architectural concept may permit the interexchange or telephone company to be the single service provider of information to subscribers on an equal basis.

Abstract: A Home PMA compliant network system comprises a telephone wiring and at least one station. Each station includes a PHY device configured for transmitting a first data packet onto the telephone wiring and receiving a second data packet through the telephone wiring, a MAC device configured for receiving digital signals from the PHY device and detecting an error within the first data packet, and an anti-offline device disposed between the PHY device and MAC device and configured for receiving a first carrier sense signal indicating whether the telephone wiring is idle from the PHY device, and detecting whether the PHY device receives the second data packet within a prescribed time interval; If the PHY device does not receive the second data packet within the prescribed time interval, a second carrier sense signal of a longer active period than the first carrier sense signal is emitted to the MAC device.

Abstract: The system and method of the present invention completes at least two calls originating from terminal equipment located at a premises and connected by a point-of-attachment having a single phone number to a public switched telephone network where a dial tone is provided to the premises. Multiple calls are now allowed with an analog interface to the public switched telephone network. At least two calls and control channel are combined into a modulated analog signal having a separate channel for each call and transmitted through a modulation/demodulation device as a modulated analog signal to the public switched telephone network. The modulated analog signal is split into respective calls and control channel. Each call is forwarded to a respective remote device based on the identity information and auxiliary information received through the control channel.