A smartjack and RJ48 are two different animals. Generally, a RJ48 is
extended out from the smtjck. Following is a good website to reference for
jack information
http://www.hubbell-premise.com/ModularJackWiring.htm
> -----Original Message-----
>
>
> RJ48 also shown as RJ48X and RJ48S are used for Digital Circuits.
>
> RJ48X Jack is used for either T1 or PRI. Telecom people work with
> this kind
> of stuff. RJ48 is a termination Jack also known
> as NIU ( Network Interface Unit ) or SmartJack.
> RJ48S Jack term is where your chanalized T1 are terminated, such as 56k
> circuits, 64k circuits or DS0 and so forth.
>
>
> For example, the T1 RJ48x Jack where the service provider terminates the
> circuit has 8 connectors such as 1,2,3,4,5,6,7,8
> which connectors 1,2,4,5 are where the coper pairs will be
> connected and the
> T1 or PRI terminated. Connector 1 takes wite/blue pair, connector
> 2 connects
> the brown/white pair, connector 4 takes white/orange, and connector 5
> takes orange/white pairs. This layout is design for digital circuit
> signaling. But if you realy look at this RJ48 is just a term and
> by hearing
> this term you know that is a telecom term.
>
> The RJ45 is a connector term design for Ethernet Networks where four pair
> coper are used, the signaling on RJ45 10baseT Ethernet uses only two pairs
> 1,2,3, and 6. I don't know on top of my head the two pairs
> signaling specs.
>
> Hope this clarifies your question
>
> Jorge Rodriguez/CCNA
> Network Services Analyst
>
>
>
> ------Original Message------
> From: peter whittle <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Sent: June 20, 2000 8:14:45 PM GMT
> Subject: RJ45 & RJ48 difference
>
>
> Hi,
>
> What is the difference between an RJ45 connector as used on 10Bt and an
> RJ48
> connector as used on 120R Primary rate?
>
> They both appear to be the same 8 pin idc connector.
>
> Thanks
>
> Peter
>
>
>
> ___________________________________
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>
> Jorge Rodriguez /CCNA
> Network Analyst
> R&S Networks Inc
> 1112 Boylston Street
> Suite 222
> Boston, MA 02115
> 1-781-614-1294
> http://www.netwire.n3.net/
> http://www.learncisco.n3.net/
>
> ........................................................
> iWon.com http://www.iwon.com why wouldn't you?
> ........................................................
>
> ___________________________________
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