CSU/DSU Network, T1, Fractional T1, T3 line RJ-48

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Image:connector_rj45m.png 8 pin RJ48 (8P8C) male connector at the cable.

Image:connector_rj45f.png 8 pin RJ48 (8P8C) female connector at the device or outlet.

This connector is used to connect a Bridge or Router to a 56K, CSU/DSU Network, T1, T3 8 pin RJ45 (8P8C) male connector layout.

The RJ-48 connector look very similar to a RJ-45 connector drawn but it’s 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.

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.

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 ring from network
8 R receive tip 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 tip from network
5 R receive ring from network
6 not used
7 not used
8 not used

References

Category: Networking Connectors

 

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