[VoIP] Old DT, Busy & Reorder on 366

[Steph Kerman]

Practically everyone who made CMOS 4000 series parts (probably dozens of 
companies worldwide) made the 4066.  It probably was reincarnated in 5V 
only 74HC form as the 74HC4066 or perhaps 74HCT4066.   Look at the 
Jameco Electronics or Mouser websites for example.

=SK=

John Novack wrote:
> 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.
>>
>>
>>