[GreenKeys] Strange double plug

[zeke440 .]

The double plugs were a regular sight in the "tech Control" side of the Comm Center
tip and ring were "both wired"  looks like the set in the picture isnt complete.
 
I dont remember if they were used for monitering or if they were used to 
Transfer lines from one TTY set to another when a set went down for maint...
I do remember being able to "Inject a Test Set signal" directly to a repaired position
useing a single plug cable...   they were also used extensively in the Microwave "Relay Rigs"
parked just down the road...  (saw them when I repaired their TTY sets but didnt like the smell of
all that "origano" they kept puffing so I didnt spend any time talking about anything just...get the 
TTY going and split... :) ) 
Andy


 

> Date: Mon, 6 Jun 2011 15:37:28 -0500
> From: jangus at suddenlink.net
> To: jhhaynes at earthlink.net
> CC: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] Strange double plug
> 
> On 6/6/2011 2:29 PM, Jim Haynes wrote:
> > The plug connects only to the sleeve terminals of the jacks! The plugs
> > are solid brass nubs that don't reach far enough into the jacks to
> > contact the tip contacts.
> >
> > The origin appears to be Western Union. I sure can't imagine what kind
> > of circuit would make use of a plug like this.
> My guess, and I'm sure if I'm wrong someone will kindly point
> it out to me. ;-)
> 
> The "double plugs" are normally set up with RX on both ring
> connections and TX on both tip connections. The reason for
> this being then it doesn't matter which way you plug them
> into the jack pair.
> 
> That green "test cord" you bought has the short plugs so it
> only hits the two ring connections.
> 
> And going out further on the limb, this is for "supervisory"
> listening (or checking) RX levels.
> 
> After all, this _is_ the phone company, you're NOT supposed
> to go "No shit?" And start laughing if the customer says
> something really goofy.
> 
> Jeff-1.0
> wa6fwi
> 
> Operators are standing by for corrections. ;-)
> 
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