On Wed, 2010-02-03 at 17:41 -0500, Guy Olinger K2AV wrote: ... > When the new "N" carrier systems came out and were being deployed, the > engineers were proud that they had created a quiet system (they had) > and would ease customer complaints about noise on the line. The > telephone company was deluged with customer complaints that the lines > sometimes sounded "dead". Telco was forced to spend a lot of money to > retrofit a noise injector which was set to a minor level of noise. ...
They do the same thing with cellular phone systems. Some systems go completely silent when the other person is not talking, which made people think they were disconnected. So they had to add a little "comfort noise" to let people know everything is still working. Al N1AL ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
