[VoIP] Registered Jacks ( was Re: Channel Bank on Ebay [not mine] and E&M )

[Mark Rudholm]

Understood.  I guess it's not as common as I thought.
Wikipedia, not surprisingly, has an interesting bit
on it, and basically agrees with what has been said
in this thread:

http://en.wikipedia.org/wiki/RJ9

They call the connector a "4P4C modular connector"
(for "4-Position, 4-Conductor").  I guess "xPyC"
is the standard generic nomenclature for the
jacks/connectors per se, separate from the RJ
specs.

Steph Kerman wrote:
> I didn't know what it was.  I haven't encountered it before...  that I 
> recall.
> 
> Steph
> 
> Mark Rudholm wrote:
>> So, given your obvious erudition on the topic,
>> did you really not know that "RJ9" was commonly
>> used to refer to the 4-position jacks?  I always
>> thought it was pretty commonly known, if not standard.
>>
>> Steph Kerman wrote:
>>   
>>> The RJ definitions are also covered in the Bell System "Registration 
>>> Manual" and most mfrs of modular jacks have a reference section in the 
>>> catalogs and on their websites listing them, in some cases complete with 
>>> errors.  Hubbell, Leviton for example, have this info in their 
>>> catalogs.  Probably Siemon too. 
>>>
>>> I have a PDF of the Oct. 1997 issue of Part 68, which lists the RJ 
>>> definitions.  The RJs do not appear in ascending order in the original 
>>> published version the document.  I added bookmarks to file to allow 
>>> direct reference to each of the RJ configurations without stepping 
>>> through page by page.  If anyone wants it it's available.  Only 1.6MB, 
>>> 162 pages.
>>>
>>> Steph
>>>
>>> John Novack wrote:
>>>     
>>>> Later versions of Part 68, past 
>>>> 1999 or 2000 have had the drawings removed, but the registration program 
>>>> begun in 1978 is still in force, though seldom enforced. All equipment 
>>>> connected to the PSTN is supposed to have a registration number, go 
>>>> through testing defined in part 68 and be connected through a registered 
>>>> jack. Since the handset of a telephone connects to the telephone which 
>>>> has passed the testing, the mounting cord of the telephone connects to a 
>>>> registered jack.
>>>>
>>>> John Novack
>>>>       
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