Digital exchange

H - Electricity – 04 – J

Patent

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Details

H04J 3/08 (2006.01) H04B 14/04 (2006.01) H04M 11/06 (2006.01)

Patent

CA 2241122

A digital exchange according to the present invention uses a first highway for transmitting PCM data and a second highway. Each of the first and second highways is multiplexed with time division. A transmission rate of the second highway is slower than that of the first highway. A rate conversion circuit converts these transmission rates. The second highway is provided with a port connected to a trunk or a line extending to a telephone. A new channel of the first highway is allocated for the port to use every time when the port receives a calling control information requesting a use of a channel of the first highway.

La présente invention porte sur un central numérique qui utilise un premier bus pour transmettre des données MIC, ainsi qu'un second bus. Un multiplexage temporel est effectué dans chacun de ces deux bus. Le débit de transmission du second bus est inférieur à celui du premier. Ces débits de transmission sont convertis par un circuit de conversion de débits. Le second bus est doté d'un port connecté à une liaison ou à une ligne qui se rend jusqu'à un téléphone. Une nouvelle voie du premier bus est affectée à ce port chaque fois que celui-ci reçoit une information de contrôle d'appel demandant à utiliser l'une des voies du premier bus.

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