Here's the link 2 cell system.

by R. Proffitt Moderator - 2/3/13 4:18 PM

In Reply to: reply to Just a few reasons by lichael

There are devices like the dock and talk.
http://www.smarthome.com/50610/Dock-N-Talk-Cell-Phone-Accessory/p.aspx

Sorry but this is not what I can guess you are after given the top post. Sometimes we have to have a discussion to see if we can figure it out.
Bob