Unlikely. The CF is used to store program data and to provide the boot code for the system. If swapping out the cards does not do it, then you may want to replace the processor module.

I would inspect the ground and bonding VERY closely. Removing a ground and the system responds with better performance is never a good thing.

One other thing. When you say noise, is this "data noise" or is this static? All the solutions I've suggested is for data noise. Data noise is generated in the telephone system and is resolved by module replacement. Static is analog noise introduced into the system from many sources, including CO Lines, bad station wiring and connections, bad jacks and water intrusion in either a cable or jack. Usually data noise is not intermittent, but static is usually intermittent until the situation worsens and it will become constant.

Rcaman

Americom, Inc.
Where The Art And Science Of Communications Meet