If you go back far enough, you might find someone who's heard of the book "Notes on the Network", which described all the signaling standards. If you ever tried to find the book, it was quashed by the phone companies because it told hackers or freakers how to fool the "Bell System"
The phone company denied the book ever existed... I just smiled with my hand on a copy in my book case. Now it's just a part of history... Neil, you forgot to mention "Quiet Tone". cheers, skipp > [EMAIL PROTECTED] wrote: > > Hi, I believe the term Multi-Frequency was used to describe the > early AT&T inter office toll dialing scheme. > > The tones used were not the tones you hear on your telephone - > but another completely different group. > > If I dig around here far enough, I may still have the > information. > > Mike, WA6ILQ, may be able to detail this better than I or, > perhaps, a retired AT&T or Western Electric systems engineer. > > Neil - WA6KLA > > > > ---- Original Message ---- > From: [EMAIL PROTECTED] > To: [email protected] > Subject: Re: [Repeater-Builder] A couple of questions about hard line > Date: Mon, 24 Apr 2006 14:08:09 -0700 > > >And Touch Tone (tm) is a registered trademark of AT&T. Everyone else > >has to use DTMF or MF depending on which side of the planet you are > >on. > > > >On 4/24/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > >> > >> Of course !! > >> > >> CG = Channel Guard - General Electric > >> > >> PL = Private Line - Motorola > >> > >> QC = Quiet Channel - RCA > >> > >> All are commonly referred to by CTCSS > >> > >> Neil - WA6KLA > >> > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
