Release Version	Centrix R51
Release Date (Staging)	21 October 2015
Release Date (Production)	28 October 2015
Summary	You can now setup an alert that will fire when a channel does not change for a given timeout period. More kinds of SSI alarms are now supported (some track circuit and signal alarms)

New Channel Change Alert Type

There is a new kind of alert that is triggered when a channel does not change for a defined period of time. You can configure any number of channels with different timeouts for each channel.

This alert can sometimes be useful for detecting when sensors have failed.

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