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: Repeater-Builder@yahoogroups.com
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
>>
>
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