It's a matter of signal. Here what Ameritech does is finds out how far you are from the co (central office) that supplies you. Then after 15,000 feet (as the crow flies) they charge you for the installation of repeaters. SMPnet At 09:55 PM 11/5/96 -0500, Michael F. Trombley wrote: >Do people who wish to use ISDN need to live three miles or closer from the >nearest phone company? > >