View Full Version : Tone detection through zarlink MT90812 ?

12-31-2008, 06:22 PM

PROBLEM: detect call disconnect on trunk line

I am trying to implement supervisory signal detection on my PBX's trunk line.
I have to use zarlink digital switch (mt90812) for this purpose. It has an energy/ cadence detection block.

So far i've configured it acc to the datasheet as per my requirements, but am having certain issues.

Anyone with any experience with supervisory signal detection on trunks or zarlink MT90812, kindly let me know.