Sigma S-Bus Extender

Sigma S-Bus ExtenderThe Sigma is an invers NT-1 that changes a BRI-S interface (NT side) into a BRI-U interface (LT side) and provides power feeding (70V) on the U interface. Many digital PBX’s offer ISDN Sbus interfaces as standard which can operate up to 0.9Km.

Sigma Datasheet

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