Multistage relay device

H - Electricity – 04 – L

Patent

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Details

H04L 12/56 (2006.01) H04L 12/64 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2200933

When a signal is transmitted from an STM line to an ATM relay channel, the signal is compressed to be cell assembled into a cell. To the contrary, a signal from the ATM relay channel is cell disassembled into separate data and then expanded. In cases where signals are exchanged between ATM relay channels, a multistage relay device does not repeatedly execute signal compression/expansion to the signal. Switching for the above operations is achieved, utilizing a signal pattern inserted into audio data. With this arrangement, an audio one-link operation is established in the environment where an STM and an ARM coexist. Because compression/expansion processes are not repeatedly conducted, delay in relaying is avoided.

Quand un signal est transmis d'une ligne STM à un canal de relais ATM, il est comprimé pour être assemblé en une cellule. Au contraire, un signal provenant du canal de relais ATM est séparé en données distinctes puis fait l'objet d'une expansion. Dans les cas où des signaux sont échangés entre des canaux de relais ATM, un dispositif de relais à étages n'exécute pas à plusieurs reprises la compression/expansion du signal. La commutation pour les opérations précitées est effectuée au moyen d'une structure de signal insérée dans des données audio. Avec cet arrangement, une exploitation audio à une liaison est établie dans l'environnement où coexistent STM et ATM. Les procédés de compression/expansion n'étant pas effectués à plusieurs reprises, on évite le retard dans le relaiement.

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