A multisite network switch for a series of RF digital trunked radio transceivers and dispatcher consoles. Each transceiver covers a certain site area. The switch establishes audio communications between different sites and various dispatcher consoles. The multisite switch has a distributed architecture in which each node of the switch is supported by a microprocessor controlled card. The nodes are connected by audio buses and a dedicated message bus. The messages on the message bus allow the nod...

The present invention relates to a method and arrangement in a telecommunication system for transferring of loading data (i.e., software) from a first telestation to at least one selected memory unit in a second telestation. The data is transferred on channels in a transmission link between the two stations. The channels are normally assigned traffic related information and speech related information. However, such traffic is temporarily halted in a channel that is used to send the loading data....

A system and method for enabling the use of popular serial networking application software to transmit PPP packet data via a CDMA type subscriber device to a network such as the internet. One or more reserved phone numbers is stored in memory within the subscriber device. The networking application is provided a telephone number to be dialed in order to make a connection to the internet. The telephone number provided to the networking application is compared to the stored reserved telephone numb...

A mobile user terminal 402 accesses a packet data network 450 through one or more of several network access points 404-412. One or more control points 432-440 determines which network access point or points the user terminal is to access. Control may be retained in the current control point, or transferred to another control point, whenever it is convenient. There are preferably several routers, each having an associated home agent 418-420 which determines which foreign agents need to be accesse...

A network for sensing, controlling and communicating information. The network comprises a plurality of cells including a first cell for sending a packet of information, a second cell for receiving the packet of information and a plurality of repeater cells for repeating the packet prior to its arrival at the second cell. A method is described including the steps of generating a random number and including the random number in the packet; performing a calculation by the repeater cells of fields i...

A method and apparatus provides for wirelessly monitoring data packets or frames transmitted in a wireless LAN, that permits a user to selectively filter out unwanted ones of the data packets or frames with respect to the source and destination hardware addresses, and to the frame type and subtypes.

A distributed modem in order to achieve non-cellular cordless/wireless data communications for portable computers is provided. In one embodiment, the modem includes three components, a digital signal processor (DSP), a coder/decoder (CODEC), and a digital-access arrangement (DAA). The DSP resides within a PCMCIA card for insertion into a computer. The CODEC and the DAA reside on a base station. The PCMCIA card and the base station communicate with one another via two transceivers, one each at th...

The interconnection topology of a serial data communications bus allows for efficient communications within a wireless communications network. A wide-area wireless mobile communications system comprises a MSC connected to a plurality of base stations via a serial communications bus and a first serial port having a first connection order. Each base station also connects to the serial communications bus via a second serial port having an opposite connection order. In one mode, the MSC communicates...

A reverse power control method for a WLL is disclosed, in which the number of times of power control value transmission is reduced to 1. The disclosed method complements the related method, in which the power control of a radio interface unit is performed in units of 0.5 dB, so that power is controlled more concretely and flexibly. Unnecessary power consumption due to power control in the WLL system is thus reduced, and the load of the system is reduced, improving the reliability of the communic...

A mobile node may roam away from its home network to a foreign network. The mobile node may communicate using the Mobile Internet Protocol, and it may use Internet Protocol security to communicate with its home network. A foreign agent on the foreign network and a home agent on the home network may dynamically link a policy to be used for a Internet Protocol security session between the foreign agent and the home agent. The foreign agent and the home agent may dynamically create a filter to be u...