[VoIP] Old DT, Busy & Reorder on 366

[John Novack]

john jones wrote:
> Doug,
>
> Is a 4066 some kind of TTL controllable audio switch?
>
> Who make it?
>
> Thanks!
>
> John
>
>   
JJ, are you THAT young??
The 4066 is a quad audio gate.

It WAS made by several manufacturers who were into the 4000 series CMOS
These date from the 70's

John Novack

> ----- Original Message ----
> From: Doug Alderdice <ka2wft at arrl.net>
> To: Voice Over IP Tandem for Analog Switches <voip at lists.ckts.info>
> Sent: Saturday, August 18, 2007 10:22:28 AM
> Subject: Re: [VoIP] Old DT, Busy & Reorder on 366
>
> At 06:37 AM 8/18/2007 -0700, Max wrote:
>   
>> This sounds great!  I noticed that your fast-busy is
>> attenuated in volume as compared to the slow busy.
>>
>> This was pretty much standard in a No. 1 SxS in the
>> Bell System, to the point that Evan Doorbell commented
>> on it in his tapes...
>>     
>
> Ah, thought I remembered something like that.  Maybe I will leave it 
> alone!  :-)  All has to do with the coupling to the various circuits.  My 
> busy goes right to the busy tone input on the connectors with no coil... 
> thus you can dial up busy on two different lines and talk across it -- 
> though you can't try that from CNET because there's only one path available 
> from * to the switch.  Reorder is coupled through a transformer as is dial 
> tone.  Though, both dial tone and reorder are hooked up the same way 
> through identical transformers and I still have a different level between 
> those two.  But, BT and reorder are gated through a 4066 chip and dial tone 
> obviously isn't gated so that's another variable in the mix.  Seems to 
> work, and if it mimics prototypical operation, more's the better.
>
> D.
>
>
>
>
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