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RE: Cable types [7:111460] posted 07/05/2006
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Additionally an RJ48 end is slightly different from an RJ45 it has one
extra notch that doesn't allow you to plug it into an RJ45 port, you can
slice this notch off essentially making it an rJ45 plug.  Most people
use rj45 plugs instead and don't worry about it.  


Patrick Laidlaw
Network Consultant
-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
Smith, Steve B
Sent: Wednesday, July 05, 2006 10:46 AM
To: cisco@xxxxxxxxxxxxxx
Subject: RE: Cable types [7:111460]

RJ48 (Registered Jack 48) is a telephone connector that has 8 positions.
It is used for T1 termination and local area data channels/subrate
digital services. It uses the same physical plug and socket as RJ45 but
the pairs connect to different pins

RJ48 connectors are fastened to STP (Shielded Twisted Pair) cables, not
the standard UTP (Unshielded Twisted Pair) CAT-(1-5). RJ45 plug will
mate with a RJ48 jack



-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
Daniel Cotts
Sent: Wednesday, July 05, 2006 11:15 AM
To: cisco@xxxxxxxxxxxxxx
Subject: RE: Cable types [7:111460]


I'll answer the RJ part. The RJ actually describes a function rather
than a physical description. You can use the same 8 position plug for
either RJ-45 or RJ-48. http://www.arcelect.com/RJ_Jack_Glossary.htm
I have seen (in catalogs) some plugs described as RJ-48 that had an
additional key on their side. They would not fit into an Ethernet style
jack. I have never seen them in a production environment.

-----Original Message-----
From: Jim [mailto:jiong50@xxxxxxxxx] 
Sent: Tuesday, July 04, 2006 3:10 AM
To: cisco@xxxxxxxxxxxxxx
Subject: Cable types [7:111460]

Hi,



Can somebody please explain to me what is the difference between RJ45
and RJ48 and also the different between crossover E1 cable and crossover
ethernet cable? Are they the same pysically or are they different? What
shld be cable type to connect to G.703 card? TIA Jim
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