We've got a TDA200 system connected to a TVA200 with 2 LCOT16 cards and 2 DLC16 cards. (I know, "go to PRI", I keep telling them)

The problem is this. Randomly, the system will blank out several phones (the screen on many phones goes blank) and then the they come back - existing calls are still connected - the caller just hears dead air for about 10 seconds.

I finally got the client to look at the system immediately after an event and one of the LCOT16 cards and one of the DLC16 cards are lit red instead of green.

The only way they can get the system back is to restart it.

Should I look to the power supply? Is one of the cards going?

Anyone have this happen before?

Thanks!!