T1 Crossover Cable - Nokia IP500 Series Installation Manual

B
Cables
The RJ-48 cable is numbered from right to left to right, with the copper pins
facing up and toward you.
Note
Use a straight-through cable (rather than an Ethernet crossover cable) to
connect an Ethernet port on the unit to an Ethernet hub.

T1 Crossover Cable

Use a T1 crossover cable to connect two units, when you use T1 connections
between DSU/CSUs.
The following figure shows pin connections for this cable.
The RJ-48 cable is numbered from right to left, with the copper tabs facing up
and toward you.
134
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IP500 Series Installation Guide