Quiet Tone ... Uh huh ... :)
---- Original Message ----
From: [EMAIL PROTECTED]
To: [email protected]
Subject: RE: [Repeater-Builder] telco and ctcss tones
Date: Mon, 24 Apr 2006 21:59:41 -0000
>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"
I heard of the book but never had one.
>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...
... snicker ...
>Neil, you forgot to mention "Quiet Tone".
>
>cheers,
>skipp
Neil
BTW:
Do you remember the Western Electric KS-19594 'Magicall' Dialer?
I have a complete photo-copy of the manual here ... 2 photo-copies
Then more info on teh dialer: Bell System Practices:
Section 512-125-400; Issue 3, August 1967; AT&T Co Standard
2 photo-copies
Relays - Pulse Speed and Percent Break: Bell Ssytem Practice:
Section 040-009-501 Issue 1, April 1967 AT&T Co Standard
1 photo-copy
Stapler - Arrow Bell System Practices Section 080-110-101
Issue 1, October, 1958 AT&T Co Standard 2 photo-copies
Stapler - Heller Bell System Practices Section 080-110-102
Issue 1, October 1958 AT&T Co Standard 2 photo-copies
Telephone Sets 1500 and 1554 Types
Identification, Installation and Maintenance
Bell System Practices Section 502-510-111 Issue 1, November
1967 AT&T Co Standard 1 photo-copy
Speakerphone system-3-type 1712B Telephone Set
Connections and Maintenance
Bell System Practices Section 512-621-474 Issue 1, August 1967
AT&T Co Standard 1 photo-copy
"Touch-Tone" Calling Receivers
Type A2 SD-95287-01 and Type A3 SD-98148-01
General Descriptive Information
Bell System Practices Section 975-212-110 Issue 2, November
1967 AT&T Co Standard 5 photo-copies ...
Note: almost looks like what we used to call the Bell System
247B Touch-Tone decoder
"Touch-Tone" Calling Receiver, Type C1 SD-67027-01
General Descriptive Information
Bell System Practices Section 975-212-130 Issue 2, November
1967 AT&T Co Standard 7 photo-copies
That is just one file cabinet folder ...............
>> [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
>> >>
>> >
>>
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