Post by thread:Books fro Answering Machine project

Hi, can anyone recommend any good books that explains how a telephone works from the household perspoective. I am building a answering machine but I need to know how the rings signal are sent, the voltage levels on the lines and how the voice data is sent. Cary Smith

Cary, You might have a look at part 68 of the FCC Rules at http://hallikainen.com/FccRules . It deals with direct connection to the public switched telephone network. Also, various companies make Data Access Arrangements (DAA) that take care of the line interface. Companies that come to mind are Clare and Cermetek. Harold On Fri, 2 Jan 1998 09:49:56 -0500 Cary Smith <spam_OUTcasmithTakeThisOuTlynx.dac.neu.edu> writes: >Hi, > can anyone recommend any good books that explains how a telephone >works from the household perspoective. I am building a answering >machine >but I need to know how the rings signal are sent, the voltage levels >on >the lines and how the voice data is sent. > >Cary Smith >