Automatic loss control circuit for digital loop transmission...

Details Automatic loss control circuit for digital loop transmission... Automatic loss control circuit for digital loop transmission...

H - Electricity

04

L

H04L 1/00 (2006.01) H04L 1/24 (2006.01) H04M 19/00 (2006.01)

Patent

CA 2065474

A circuit is proposed for adjusting the loss provided to loops in digital loop carrier transmission systems. A constant current is supplied to the loop and the resulting voltage is measured to determine the resistance of the loop. This value is fed to a microprocessor with a look-up table which controls a programmable analog/digital converter. The loss at the output of the converter is a stepwise function based on the resistance of the customer loop.

L'invention est un circuit servant à ajuster les pertes dans les boucles d'un système de transmission numérique. Un courant constant est fourni à la boucle et la tension résultante est mesurée pour déterminer la résistance de cette dernière. Cette valeur est introduite dans un microprocesseur avec une table de consultation qui contrôle un convertisseur analogique-numérique programmable. La perte à la sortie du convertisseur est une fonction de saut basée sur la résistance de la boucle du client.

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