[VoIP] Channel Bank on Ebay [not mine] and E&M

[John Novack]

Repeating a previous post.
Handset plugs and jacks HAVE NO RJ designation.
All Rj designations refer to the wiring pattern and connections starting 
back in 1978.
Refer to FCC  Part 68 BEFORE 2000.
Google should be your friend.
RJ 12 and 13 reference connections to 1A2 key systems, RJ14 is 2 lines 
on one jack, RJ-25 is three lines on one 6 pin jack.
RJ3x and 4x are 8 position modular .

John Novack


windmill wrote:
> Steph,
>
> Perhaps you can clarify what RJ10 and RJ12 are, I had always thought the 
> RJ12 to be a telephone handset plug but I have never really known what 
> an RJ10 is. My Crimping pliers do RJ45 (8P8C), RJ11 (6P6C) and a 4P4C 
> connector which I believe is RJ12. I have seen a two pin version in this 
> same series used internally in some telephones, would that be RJ10?
>
> Brian
>
> Steph Kerman wrote:
>   
>> Thanks for the clarification. 
>>
>> That has to be a moniker that someone invented, in other words, sort of 
>> a fiction.  It has no real legitimacy no matter how many people may use 
>> it, the way RJ11 and most others do.  Many people also refer to the 
>> handset jack as an RJ22, another mis-invention in this case since the 
>> RJ22 actually is a documented and defined interface that uses a 25 pair 
>> Amphenol mini-ribbon connector to connect to multiple lines.
>>
>> Regardless of its popular use, RJ has a formal meaning.  It refers to a 
>> "registered jack" under the FCC program that was established to allow 
>> direct connection of privately owned equipment to the public network.  
>> Since the Bell System was never forced by the FCC to allow connection of 
>> privately owned equipment to their own phones at the handset interface 
>> (as opposed to directly to the line itself), no RJ was ever defined 
>> using the 4-position jack.
>>
>> Steph
>>
>> Mark Rudholm wrote:
>>   
>>     
>>> RJ9 is the small (four conductor positions) connector
>>> used on handsets and handset cords.
>>>
>>> (it's not normally used for phone lines, with some
>>> weird exceptions, like Sangoma FXS PCI cards)
>>>       
>>>>>   
>>>>>
>>>>>         
>>>>>           
>>   
>>     
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