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

[John Novack]

Mark Rudholm wrote:
> So what's the connector used in RJ11 installations called?
>
>   
The plugs you are referencing are 6 position modular plugs, equipped 
with either 4 or 6 contacts
The handset plugs are 4 position
The data are either 8 or 10 position, keyed or not keyed. Seldom seen 
are the 10 position ones. I have one 6 serial port board (ISA) for a 
Unix/Linux box that was equipped with them. The drivers for that board 
even had an option to swap the functions around so that positions one 
and 10 weren't needed, as the plugs were so rare.

Handset plugs have no RJ designation, as RJ is for (registered jack ) 
see FCC regs part 68 for more details. 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

> Steph Kerman wrote:
>   
>> To add to what I said below,an RJ11 no more refers to the plug or jack than a DB25 or DE9 (or DB9 as some insist on saying) refers to a serial RS-232 port or possibly a parallel port in the case of a 
>> DB25.
>>
>> An RJ11 is defined as a 6 position jack terminating a customer line connecting towards the PSTN.  The 6 position jack on the back of a telephone set is NOT an RJ11 since plugging a phone into it will 
>> not deliver dial tone to a phone plugged into it.  RJ11 defines a physical connection port into the PSTN, not a piece of connecting hardware.  The same applies to all other RJs when the terminology is 
>> correctly used.
>>
>> =SK=
>>
>> 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)
>>>
>>> Steph Kerman wrote:
>>>   
>>>       
>>>> RJ9?  My Registration Service Manual jumps from RJA3 to RJ11.  What is 
>>>> an RJ9?
>>>>
>>>> Steph
>>>>
>>>> Mad Mark wrote:
>>>>     
>>>>         
>>>>> I don't see any RJ9 (telephone) ports on it anywhere. How are phones hooked to such a unit??
>>>>>
>>>>>
>>>>>
>>>>>   
>>>>>       
>>>>>           
>>>>>> Date: Thu, 6 Dec 2007 07:19:00 -0800
>>>>>> From: ikj1234i at yahoo.com
>>>>>> To: voip at ckts.info
>>>>>> Subject: [VoIP] Channel Bank on Ebay [not mine] and E&M
>>>>>>
>>>>>>
>>>>>> Currently on Ebay there's a Coastcom channel bank with
>>>>>> a total of 2 T1's and 48 FXS ports.  Initial asking
>>>>>> price is $19.99. [Item number: 120193396868]
>>>>>>
>>>>>> I have no interest in this item except that I have an
>>>>>> identical Coastcom unit here which I can say is
>>>>>> definitely Telco quality, *not* "consumer" grade! 
>>>>>> Manuals are freely downloadable in PDF format from
>>>>>> coastcom.com.
>>>>>>
>>>>>> Additionally I have several 4W E&M cards and I would
>>>>>> be very willing to consider sending a couple of them
>>>>>> (for shipping costs only) to someone on list if they
>>>>>> will use them...  Each plugin card supports two
>>>>>> separate 4W E&M trunks...
>>>>>>
>>>>>> Max
>>>>>>         
>>>>>>             
>>>>>   
>>>>>       
>>>>>           
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>
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