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8 pin RJ45 (8P8C) male connector layout
8 pin RJ45 (8P8C) male connector
at the cable (RJ-48 used)
8 pin RJ45 (8P8C) female connector layout
8 pin RJ45 (8P8C) female connector
at the device or outlet (RJ-48 used)
used to connect a Bridge or Router to a 56K, CSU/DSU Network, T1, T3

The RJ-48 connector look very similar to a RJ-45 connector drawn. But its different. RJ-48 connections are made with a STP (Shielded Twisted Pair) cable (not UTP - Unshielded Twisted Pair). RJ-48 uses a pin out arrangement, voltage level, and line capacitance different from a typical RJ-45.
 

RJ-48S Jack Connector pinout
Pin Signal Description
1 R1 transmit ring to network
2 T1 transmit tip to network
3   not used
4   not used
5   not used
6   not used
7 T receive tip from network
8 R receive ring from network


 

RJ-48C Jack Connector pinout
Pin Signal Description
1 R1 transmit ring to network
2 T1 transmit tip to network
3   not used
4 T receive ring from network
5 R receive tip from network
6   not used
7   not used
8   not used

Cable for conection of WAN port with wall outlet is shielded (STP) straightforward (R to R, T to T) with R with T, R1 with T1 wires twisted.

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Old.Pinouts.ru > Network hardware interfaces > Pinout of CSU/DSU Network, T1, Fractional T1, T3 line RJ-48 and layout of 8 pin RJ45 (8P8C) male connector and 8 pin RJ45 (8P8C) female connector
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