Setting DXBD_MINLCOFF to 0 disables LCOFF events

Symptom

The parameter DXBD_MINLCOFF is used to define the amount of time that loop current must be down before receiving an LCOFF event.  Setting this parameter to 0 stops LCOFF events from being received by the application.

Reason for the issue

Setting DXBD_MINLCOFF to 0 disables LCOFF events.

The following code shows this parameter being set to 0:
 

Also note that in order to receive LCOFF events, DM_LCOFF must be specified in dx_setevtmsk().

Fix / Solution

Two possible solutions:

1. Don't set this parameter.  Allow the default to remain in effect.  This is usually sufficient to identify loop current drop.  

2. If the parameter must be modified, set it to a positive number.

Product List

All analog Dialogic JCT products