I'd like to mention that the one experience I made programming one of these a couple of years ago left me wishing that they had installed about eight ounces of lead weights in the thing. It felt light, like a toy. I once bought a phone for ten bucks at a drug store and it had a heftier feel. But then, it also was made of light plastic and had a slug of lead glued inside it!
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw