Abstract: A telecommunication assembly includes various terminals which share a transmission channel via a base station for granting or not granting a terminal access to the transmission channel on the basis of different priorities being assigned to the terminals. The base station includes communication-and-control circuitry for providing a communication channel between the base station and each terminal irrespective of whether a high-priority terminal has been granted access to the transmission channel. This allows a user of a low-priority terminal to be informed that he or she cannot make use of the telephone line for reasons of priority. Once the telephone line is free, the base station may signal this to the low-priority terminal which has been denied access to the telephone line. An internal communication between two different low-priority terminals can be effected while a high-priority terminal uses the telephone line.

Abstract: A method and a communication device detect a service signal and include a converter having a first input which is connected to a communication channel for communicating with a network. An input device is connected to a second input of the converter for providing input signals to the converter. An echo canceller receives the input signals to form a replica of echo present in output signals from the converter for cancelling the echo and forming modified output signals. An output device is connected to an output of the echo canceller for receiving the modified output signals, and a service signal detector is connected to the output of the echo canceller.

Abstract: A communication system for communicating between a first device and a second device is disclosed. The first device includes a first processor and a first memory, while the second device includes a second processor a second memory. The processors allow communication between the devices when an identical identification code is stored in both devices. In response to a user command, the first processor replaces an old identification code with a new identification code in a first memory location of the first memory. In response to a request signal from the first device, the second processor replaces the old identification code in a first location of the second memory with the new identification code. In response to an acknowledge signal from the second device, and after verifying that the new identification code is included in the acknowledge signal, the first processor replaces the old identification code in a second memory location of the first memory.

Abstract: A method of generating a random number is disclosed for forming an identification code used for mutual identification between a base station and a mobile telephone. The method includes receiving a radio signal by the base station or the mobile telephone; performing time intervals measurements separating passages of the radio signal through a reference level; and forming the random number from the time intervals measurements.

Abstract: A channel is selected first, and immediately the received field is measured and digital Manchester code data are searched for. The digital signals are 100% Manchester code signals. After a predetermined first delay, the carrier level is tested and recorded in a memory. The smallest value among the various recorded values is selected; a fixed value is added thereto; and the value thus obtained is used as a threshold value for the level test. If the channel is free, another channel is selected. If the channel is occupied, one will wait for a second delay period, after which a test is performed to know whether data have been recognized. If nothing has been recognized, another channel is selected.