Abstract: A system for automatically selecting communication frequencies for wireless communication devices (e.g., base unit, access point, and controller) being added to an existing wireless network. The operating frequencies, evaluated signal strength, and loads are used in determining the most suitable operating frequency. This automatic selection process eliminates the problems inherent in manual frequency selection.

Abstract: A software-controlled communication method and an apparatus thereof is disclosed. The apparatus includes a radio frequency (RF) front end unit for sending a data signal or a voice signal to a cordless phone base station via an antenna, an analog-to-digital for converting an analog signal received from the RF front end unit into a digital signal and a digital-to-analog converter for converting a digital signal into an analog signal and providing the converted signal to the RF front end unit, and a baseband signal processor, having a plurality of signal processing modules for processing communication signals and a control module for controlling the signal processing modules installed therein as software modules, for providing cordless phone and handset transceiver functions.

Abstract: The present invention provides a telephony-accessed application system for providing a service, such as voicemail, in accordance with a switching interface such as in the ITU-T H.323 or IETF SIP recommendation. Queuing functionality is made possible in a system which employs a switch which does not support queuing. The queuing functionality is made possible by a queue means which is provided within an application means, i.e. the voicemail means itself. Consequently, the switch itself is relieved of the burden of having to keep track of the exact status of each of its ports at all times. The high-level queuing is performed at a logical level rather than at the physical level, and therefore affords a cleaner interface. Furthermore, the implementation of the queuing functions in the terminating application means allows for the use of a wider variety of intermediate switch means in a network.

Abstract: A system and method of automatically transferring a call between telephones based on the distance between the two telephones is provided. First the proximity of a first telephone to a second telephone is determined. If the proximity is within a predetermined limit or threshold, calls directed to the first telephone are transferred to the second telephone. Security of the transfer may be ensured to prevent fraudulent use of the subscription of either telephone. Procedures are provided which permit any the above-mentioned steps to be performed either at the level of the individual telephones involved in the transfer, or by an element of the network, such as an SC or HLR.

Abstract: Methods and apparatus for managing the distribution of data objects in a communication network are disclosed. In an exemplary method, such as might be implemented at a data object server, a plurality of data objects corresponding to a first user of a first communication device are stored. State information for the first communication device is received from the first device. The occurrence of a trigger event related to communications between the first communication device and a second communication device is detected, and one of the stored data objects is selected, based on the detected trigger event and the received state information, and forwarded to the second communication device. In some embodiments, the selection of the data object is further based on an identifier corresponding to the second communication device.

Abstract: A pair of shorter range radio frequency networks may be linked together using a longer range communication protocol that is not based on the same radio frequency protocol utilized by the shorter range radio frequency networks. Enumeration data from one of the shorter range networks may be exchanged over a longer range network to combine the two shorter range networks using proxy devices such as cellular telephones. This may allow devices in a shorter range network to communicate over a longer range.

Abstract: A cordless slave apparatus is connected to a host apparatus connected to lines via wireless communications. When the cordless slave apparatus is picked up from a charging apparatus to respond to a call from any of the lines, if the line at which the call has arrived has been selected by the cordless slave apparatus, the line is connected immediately and communications can start. If the line is not selected by the cordless slave apparatus, when a connection instruction from the user is provided, the line is connected and communications can start. When calls have arrived from lines simultaneously, communications can start by capturing a line according to a connection instruction. When a call from another line has arrived during communications, the lines are switched according to a switching instruction from the user and the line through which the communications have been performed is automatically turned to be on hold.

Abstract: Users can make landline, wireless and/or internet calls from a conventional landline communication device. If the communication device is on a wireless call, that call may be placed on hold to answer an incoming call on the landline. Likewise, if the communication device is on a landline call, that call may be placed on hold to answer an incoming call on the wireless telephone. Wireless and landline calls may also be conferenced together.

Abstract: The conventional wireless LAN system has the difficulties in limiting the extent to which network services are provided simply by controlling the intensity of radio wave. When the master unit 100 detects a mobile wireless terminal in its communication area (in step S100), it inquires of a plurality of slave units 200 and 300 if they are ready for communication with the mobile wireless terminal (in step S110). The master unit determines whether or not to provide network services to the mobile wireless terminal according to the combination of readiness for communication between each the slave units 200 and 300 and the mobile wireless terminal (in steps S120 and S125).

Abstract: Various embodiments of the present invention are directed to systems and method for detecting conflicts and applying conflict resolutions during manual and automatic conflict resolution operations. Several embodiments are directed to preventing both: (a) non-convergence of conflict resolutions, where partners can end up in a divergent steady state (i.e. have different data in the absence of outstanding conflicts); and (b) a non-terminating ping-pong of conflict resolutions between partners (which can occur with certain inefficient solutions that continuously update metadata for each conflict resolution without end). Certain specific embodiments of the present invention are directed to a method for maintaining knowledge that guarantees convergence of data, even when different partners apply different conflict resolutions.

Abstract: A system and method for providing quality-of-service based network resource allocation and utilization in a dynamic network environment. For example, a wireless communication network may comprise a first system and a second system. The first system may provide a current service to a user at a current quality level. The first system and second system may establish a wireless communication link. At least one of the first and second systems may determine whether utilizing one or more resources of the second system will provide the current service to the user at a higher level of quality than the current quality level. One or more resources of the second system may be allocated for providing the current service to a user at a higher quality level. The allocated resources may be utilized to provide the current service to the user at a higher quality level than the current quality level.

Abstract: The invention relates to a device for communicating with a system (1, 17). Said device has mobile communication means (12, 27) for a cabled or wireless data exchange with the system (1, 17) and an emergency-stop button (4, 20) integrated into an emergency-stop part (11, 26), with said emergency-stop part (11, 26) being hard-wired to the system and forming, permanently coupled to the mobile communication means via a mechanical coupling link, a portable functional unit serving to perform mobile operator control and monitoring functions.

Abstract: A phone, method, and system are presented for determining whether a cordless handset is positioned on a base unit of a cordless telephone. An on-base unit signal may be generated in response to a cordless handset being positioned in contact with a base unit of a cordless telephone and an off-base unit signal may be generated in response to the cordless handset not being positioned in contact with the base unit. The on-base unit signal or the off-base unit signal, depending upon the position of the cordless handset, maybe communicated over a communications network with which the base unit is in communication.

Abstract: A wireless clock system includes a master clock or other master time source, and a plurality of slave clocks or repeater devices. Each slave clock can both wirelessly receive and wirelessly transmit time signals including current time data. To avoid conflicts among the slave clocks, each slave clock transmits time signals in a frequency-hopping manner over pseudo-randomized frequencies and at pseudo-randomized transmission start times. In another embodiment, power consumption at the slave clocks is minimized by activating and deactivating receivers within the slave clocks at predetermined times and at predetermined intervals, each interval being longer than the previous interval, until valid time signals are received from either the master clock or another slave clock. Calibration of the slave clock's time base is also performed.

Abstract: A radio communication method allowing a portable device to be easily found using its accessory is disclosed. In response to an operation of a predetermined key of the accessory, the accessory transmits a ringing signal to the portable device. When receiving the ringing signal from the accessory, the portable device starts alerting and, when a predetermined key of the portable device is operated, the portable device stops alerting.

Abstract: A communication system 100 allows for heterogeneous piconets/scattenets 100 where in multiple modes 110, 112 of transmission, one of Bluetooth 110 and one or more other modes of transmission 112 are possible. While at the same time maintaining synchronization between all the different modes of transmission 110, 112 in a given piconet and across a scatternet 100. This allows for a communication device that can communicate using a plurality of transmission modes depending on the communication needs of the device.

Abstract: Methods to create a cellular-like communication system, such as a Wireless Private Branch Exchange (WPBX), which includes mobile devices such as standard cordless phones (handsets), particularly, mobile devices utilizing the Bluetooth short-range wireless communication protocol. The methods provide seamless and reliable handoff of sessions between Base Stations while the mobile device is moving between picocells, by implementing a high-level of synchronization between the Base Stations and the Switch. Base Stations of picocells having small coverage areas communicate with the handsets. The communication protocol is divided into a low-level protocol performed by the Base Stations and a high-level protocol performed by the Switch connected to all the Base Stations. The methods support mobile computing or telephony devices and communication protocols, which are not specified to handle handoffs of sessions while moving between Base Stations coverage areas in a data, voice or telephony wireless network.

Abstract: Currently, networks are used within most enterprises to allow for sharing of resources such as printers and to allow for central server features to be available such as backup operations, shared files, and internal email. With the introduction of the third generation of wireless communication networks in which a mobile station can have an always on capability, private networks can now be established between mobile stations. In these implementations, the mobile stations each have a Home Location Registration (HLR) and a unique Internet Protocol (IP) address. The mobile stations within a private network are listed within a table stored in the intelligent peripheral by their HLRs. The intelligent peripheral regulates the flow of data units within the wireless network by determining if the sender of a packet and the intended recipient are within the same private network.

Abstract: A cordless telephone system including a telephone equipment, and a terminal device capable of wireless communication with the telephone equipment. Each of the terminal devices includes an identification-information memory unit for storing terminal-device identification information. The telephone equipment includes an output unit for outputting, explicitly to a user, at least one of the identification information and information associated with the identification information about a plurality of terminal devices that transmit the identification information, a user-operated unit operated by the user, and a register unit for storing the identification information about the terminal device so that the terminal device acts as a child device.

Abstract: In one embodiment, a method for implementing two-way communication between at least first and second devices comprises steps of: (a1) during finite time periods following transmission of respective first messages from the first device to the second device, using the first device to listen for second messages transmitted from the second device to first device; and (a2) after each of the finite time periods following the transmission of the respective first messages from the first device to the second device, ceasing to use the first device to listen for second messages transmitted from the second device to the first device until after the first device transmits another first message to the second device.

Abstract: A plug-in network appliance is disclosed. In one aspect, a network appliance performs a bridge between two wireless communication formats. In another aspect, a network appliance is deployed to perform position location services. In another aspect, a mesh network comprising one or more network appliances is deployed. A mesh network comprising one or more network appliances may be deployed to perform position location services. A plug-in form factor is described. A network appliance may convert power received from a plug in a first format to power in a second format for powering various components. A network appliance may connect with a wireless network and/or a network connected through a plug. A plug-in network appliance may connect to a weight-bearing outlet. Various other aspects are also presented.

Abstract: Apparatus, method and system for notifying a communications-switching center that subsequent communications directed to a wireless number associated with the wireless unit are to be routed to a destination number associated with the wireless unit. In response to a triggering event by the wireless unit through the base unit, the base unit can cause the wireless unit to transmit an SMS message to the communications-switching center. The SMS message can include a notification that subsequent communications directed to the wireless number associated with the wireless unit are to be routed to the destination number associated with the wireless unit.

Abstract: A system for (and a method of) selectively establishing communication with one of plural devices associated with a single telephone number is provided. In a preferred embodiment, the system includes a wireless connect unit connected between an enterprise private branch exchange (PBX) network and a public switched telephone network. The wireless connect unit preferably serves as a gateway between the PBX and one or more remote communication devices. The remote devices can be used as standard PBX office telephones for both inbound and outbound telephone calls. Thus, features of the PBX network (e.g., voice mail, direct extension dialing, corporate calling plan, etc.) are available to the remote device even though they are not physically connected to the PBX. When the system receives an incoming call, it can route the call to an office telephone and one or more of the remote devices simultaneously or as desired by the user.

Abstract: A communication device implementing a function of retransmitting to a destination includes an operation unit detecting an input operation, a communication module starting a transmission to a destination specified by the input operation, a storage unit storing one or more pieces of destination specifying information on every destination, a judging module judging whether the communication can be attained upon the transmission, a searching module searching for, if judged to be impossible of the communication, one or more pieces of destination specifying information stored corresponding to the destination from the storage unit, a display unit displaying a list of the searched destination specifying information, a selection module accepting a selection of a desired piece of destination specifying information from the list of the destination specifying information displayed, and a retransmitting module retransmitting based on the selected destination specifying information.

Abstract: A personal communications system includes an interface unit which transmits calls received on a mobile wireless phone to one or more hard-wired telephones. In one embodiment, the interface unit includes a connector which mates with a voice communications port of a wireless device, which may be a cell phone, web-enabled phone, personal digital assistant adapted for wireless communications, or a so-called pocket PC. When a call is received by the wireless device, a processor automatically sends the call to a hard-wired telephone through the connector. In another embodiment, the interface unit is equipped to receive multiple wireless devices, and calls from each device are managed to prevent calls from two or more of the devices from being sent to the hard-wired telephone at the same time. This system thereby advantageously allows a use only one telephone number to satisfy all his personal communications needs.

Abstract: The invention relates to methods pertaining to cell reselection in a cellular telecommunication system. According to the invention, a connection setup rejection message is used to direct a mobile communication means to attempt a new connection with certain parameter values such as a certain carrier frequency. A plurality of parameter values may as well be indicated in the message, which allows the network to direct the mobile communication means to make a connection setup request to a specific cell, for example. The connection setup rejection message can be for example the CONNECTION SETUP REJECT message of the RRC protocol.

Abstract: A wireless handset or wireless headset includes a Bluetooth transceiver that is coupleable to an external Bluetooth compatible device, that sends the first audio data to the external Bluetooth compatible device and that receives the second audio data from the external Bluetooth compatible device. The Bluetooth transceiver includes a first integrated circuit that includes a memory module that stores a plurality of operational instructions for implementing a plurality of protocol layers of a Bluetooth protocol, a processing module that executes the plurality of operational instructions, and a first interface module.

Abstract: A public land mobile network (PLMN)/private wireless network-integrated service network and a system for the service network. The service network according to the present invention can interwork with any PLMN with no dependence on an upper system. In the present invention, there is no need for a public BSC and a separate private BSC. The novel BSC handles both public and private data and voice calls placed from or placed to a mobile station or terminal. The novel BSC enables a wireless phone or terminal to place and receive calls using either the public communications network or the private communications network. Thus, the need for a redundant private BSC is eliminated while providing the diversity of services to mobile stations.

Abstract: There is disclosed a communication apparatus including a first communication portion, a second communication portion, a speech detecting portion, and a communication control portion. The first communication portion wirelessly sends and receives audio data to and from a first other communication apparatus by using a frequency channel within a frequency band. The second communication portion wirelessly sends and receives general data to and from a second other communication apparatus by using a frequency channel within the frequency band. The speech detecting portion detects, on the basis of the audio data received from the first other communication apparatus, that a user at the first other communication apparatus is speaking. The communication control portion interrupts the wireless communication implemented by the second communication portion when it is detected by the speech detecting portion that the user at the first other communication apparatus is speaking.

Abstract: A method of establishing a cooperative ad hoc network of phone extensions is implemented by the cellular devices within the ad hoc network. First, a first cellular device receiving an incoming call or placing an outgoing call is designated as the master of the ad hoc network and the remaining cellular devices are designated as slaves of the ad hoc network. Second, each cellular device is operated to facilitate a multi-party connection to the incoming call or outgoing call, the multi-party connection including the master and one or more slaves.

Abstract: The present invention provides for the addition of multiple telephone handsets and/or similar peripherals wirelessly connected to the transmitter base of a cordless telephone system. A cordless telephone transmitter and at least one wireless receiver peripheral providing cordless telephone access to an existing telephone network is presented. The present invention provides for the addition of multiple telephone handsets and/or similar peripherals wirelessly connected to the transmitter base of a cordless telephone system.

Abstract: A decorative wireless earphone is a single piece integrated with a necklace, a microphone, a main unit and an earpiece. The main unit has a shape of pendant and the earplug is hidden behind the ornamental part. The lead wire is received in the necklace. The distance between the microphone and the earpiece is almost equal to the distance between the mouth and the ear of human. Due to the wireless earphone being designed as an ornament, it could be worn on the neck naturally and reasonably with less chance of being lost, convenience and easy-storage. Hence, the decorative wireless earphone of the present invention has enhanced the value thereof additionally and has promoted competition thereof in the market.

Abstract: A cordless communication system includes a base unit and a handset. The base unit is connectable to a communication line. The handset includes a handset wireless communicating unit, a handset communicating unit, a handset switching unit, and a handset starting unit. The handset wireless communicating unit implements wireless communications with the base unit wireless communicating unit. The handset communicating unit is capable of communicating signals with the base unit. The handset switching unit switches between a handset normal mode in which power is supplied to the handset wireless communicating unit and a handset power-saving mode in which power to the handset wireless communicating unit is interrupted.

Abstract: A system for interconnecting wired and wireless phone services in accordance with the present invention includes at least one of first wired terminals; public/private mobile communication terminals which are registered in public and private mobile communication networks; a private base station which constructs a wireless communication path with an arbitrary mobile communication terminal in its service area and manages wireless resources for the mobile communication; and a wired and wireless interconnecting apparatus which is connected to a public phone network and the private base station, constructs an internal network formed of the first wired terminals and the public/private mobile communication terminals to endow each of the terminals with a wired phone number, makes a call to a wired terminal in the case that there is a call to an arbitrary first wired terminal, and performs a switching function to simultaneously make a call to the public/private mobile communication terminal assigned to the first wired

Abstract: Text messages are communicated between a personal computer and a cordless device having a base unit and a handset. Text messages sent from the personal computer to the handset are displayed on a text screen on the handset. Text message sent from the handset to the personal computer are displayed on a text window on the personal computer. Messages can be passed from the personal computer to a base unit of the cordless device using an analog or a digital interface. In addition, stereo music is transmitted from a stereo source to the handset through the base unit.

Abstract: Methods, apparatuses, and computer program products provide for creating a gateway between a wired telephone and a wireless telephone network. The gateway device is connected to a wired home telephone network having one or more wired telephones, a wired telephone network, such as the PSTN, and a wireless telephone network. The apparatus may operate in a first mode that allows the wired telephone network to be utilized as a primary telephone network for the wired home telephone network and the wireless telephone network to be utilized as a backup in case of failure of the wired telephone network. Alternatively, the apparatus may operate in a second mode that allows the wireless telephone network to be utilized as a primary telephone network for the wired home telephone network and the wired telephone network to be utilized as a backup in case of failure of the wireless telephone network.

Abstract: An apparatus, method and system for matching subscriber states in network in which public land mobile network and wired/wireless private network are interworked are disclosed. The system matches subscriber state information of the public network to subscriber state information of the private network by allowing the private network to transmit state information of a mobile station toward the public network, the mobile station being located in a public and private cell area. The method includes the steps of a) allowing the private network to check state of a mobile station located in a public and private cell area and transmit the subscriber state information associated with the mobile station toward the public network; and b) allowing the public network to receive the subscriber state information and update the state of the mobile station in a visitor location register.

Abstract: A cellular-communications device comprises a cellular-communications transceiver to communicate via a cellular-communications system; a local-communications transceiver to communicate via a local-communications system; and a switch coupled to said local-communications transceiver to switch it on when a probability value indicates, that said cellular-communications device is within a communications range of a base station of said local-communications system. A communications method comprises providing communication via a cellular-communications system; and switching on communication via a local-communications system when within a communications range of a base station of said local-communications system based a probability value.

Abstract: A portable communication device (200) can serve as a multimedia controller and can include a transceiver having wireless access to a client computer (510) coupled to a multimedia device (515, 520, and 525). The multimedia controller can also include a display (205) coupled to the transceiver (201), and a processor (202) coupled to the display and the transceiver. The processor can be programmed to send instructions to the client computer to perform at least one function among retrieving status information regarding the multimedia device, retrieving a program channel guide, controlling a recording function, selecting a program channel for display at the multimedia controller or selecting content from the client computer or a server coupled thereto for display at the multimedia controller. The processor can also be programmed to receive status information or content in response to sending instructions and to display the status information or content.

Abstract: A method, apparatus and system for extending wireless network coverage is generally presented. In this regard, an extender agent is introduced to determine whether a wireless communication(s) was intended for a client(s) on an extended coverage network serviced by a client receiving the communication.

Abstract: A multi-media cradle adapted to receive a mobile phone comprises a housing and a cradle mounted to the housing for seating the mobile phone. When seated, the multi-media cradle is electrically coupled with the mobile phone via a system bus line. A display is included for viewing text and images originally intended for the mobile phone's display. Similarly, a speaker and microphone is included for reproducing audio input/output of the mobile phone. In addition, a QWERTY type keyboard is included for text and character entry. Data ports allow the multi-media cradle to be coupled with a variety of peripheral devices and removable storage media ports receive removable storage media such that data can be stored, retrieved, and exchanged between a removable storage media and the mobile phone. Also included are one or more short range RF transceivers for exchanging data from the mobile phone with an external device.

Abstract: There is disclosed a telephony apparatus comprising a base station and a handset, one of the base station and the handset being connected to a telephony system via an IEEE 802.11 interface, the base station and the handset each further being provided with a Bluetooth interface, speech data and/or control data being transmitted between the base station and the handset on the Bluetooth interface.

Abstract: Systems and methods for wireless communications between at least one electronic device and a landline telephone. A system includes at least one electronic device in communication with a cordless telephone base station. In the preferred embodiment in which BLUETOOTH standards are used, each of the cordless telephone base station and the at least one electronic device includes a BLUETOOTH radio transceiver, so that the at least one electronic device can communicate with the base station using BLUETOOTH communications protocol. The cordless telephone base station also includes a cordless radio transceiver to communicate, using cordless radio frequency communications, with at least one cordless handset. The BLUETOOTH radio transceiver and the cordless radio transceiver of the cordless telephone base station are coupled so that a user can use cordless handsets to exchange messages, including audio, video and data, with the at least one electronic device through the control of the telephone base station.

Abstract: This invention synchronizes the sample clocks of an entire wireless network from a single central base station. Unlike a conventional digital radio network where every terminal must have a synchronization circuit in its receiver to adjust the sample clock, each of the radio terminals in this network is clocked from an independent free-running oscillator. For each terminal, the base station learns the frequency and phase of the oscillator by exchanging a special set of signals: first a vernier signal to determine the initial time and frequency offset, and then an early-late signal to track changes in the oscillator. Once the base station is synchronized to the terminal's oscillator, it can determine the absolute path delay between itself and the terminal and correct for the delay using an equalizer. Signals received from the terminal are corrected after the signal arrives at the base station.

Abstract: Registering a Mobile Station (MS) in a private mobile network cooperating with a Public Land Mobile Network (PLMN) enables necessary MS information (IMSI/MIN and ESN) to be registered with an incoming call of the MS without a complicated procedure when the MS registers with the private mobile network and includes: receiving an Origination Message (ORM) transmitted from the MS through a private Base Transceiver Station (pBTS) included in the private mobile network; extracting a function code, a Mobile Directory Number (MDN), and MS information from the received ORM; examining MS registration information stored in the pHLR using the extracted MDN when the function code is a registration function code; and updating and registering the MS registration information using the extracted MS information when the examined MS registration information is in a registration initialization pattern.

Abstract: A cordless slave apparatus is connected to a host apparatus connected to lines via wireless communications. When the cordless slave apparatus is picked up from a charging apparatus to respond to a call from any of the lines, if the line at which the call has arrived has been selected by the cordless slave apparatus, the line is connected immediately and communications can start. If the line is not selected by the cordless slave apparatus, when a connection instruction from the user is provided, the line is connected and communications can start. When calls have arrived from lines simultaneously, communications can start by capturing a line according to a connection instruction. When a call from another line has arrived during communications, the lines are switched according to a switching instruction from the user and the line through which the communications have been performed is automatically turned to be on hold.

Abstract: A wireless communication link is established between a mobile station and a landline station, independently of the landline and wireless telecommunications networks. The mobile station, while engaged in a call via a wireless telecommunications network, may wirelessly transmit a bridging signal to a transceiver, in order to include the landline station in the call independently of the landline telecommunications network. While the landline station is engaged in a call via the landline telecommunications network, the transceiver may wirelessly transmit a bridging signal to the mobile station, in order to include the mobile station in the call independently of the wireless telecommunications network.

Abstract: A telephone equipment having a main apparatus and a plurality of cordless handsets, which can perform an extension communication with being relayed by the main apparatus. Such a telephone equipment includes a line holding system that holds a connection between the main apparatus and the outside apparatus, an extension communication detecting system that detects start of the extension communication when the communication with respect to the outside apparatus is being held, a timer that measures a time period elapsed from the start of the extension communication, and a notification system that causes at least one of the cordless handsets performing the extension communication to perform a notifying operation when the time period measured by the timer exceeds a predetermined time period.

Abstract: Range limited antenna includes first and second pair of antenna elements, and an RF signal processing network connected to both pair of antenna elements. The network has a function, F(?,x)??A(x)??B(x), where x is a signal, ?A(x) is the phase angle of signal x at the first element pair, ?B(x) is the phase angle of signal x at the second element pair, and ? contains all additional parameters which bear on the system. The network is configured to pass a signal for which F(?,x)>?, where ? is a threshold amount, such that the antenna has gain to signals within a radius and has attenuation outside the radius.

Abstract: An initiator transceiver for operating in a two-way half-duplex communication mode with multiple recipient transceivers. The transceivers includes a body having a cavity and a control device, positioned within the cavity, for receiving a recipient identification code that identifies a remote transceiver and for transmitting an initiator identification code and the recipient identification code to the remote transceiver. The control device scans a plurality of channels for a signal or interference and designates a first available channel as a primary channel and a second available channel as a standby channel.