HP AdvanceStack 10Base-T Hub-12 Installation And Reference Manual page 29

Using RJ-45 Connectors:
until the tab on the plug clicks into place.
B 12 11
To disconnect an RJ-45 plug, press the small tab on the plug and, holding
it up, pull the plug out of the jack.
Using Telco Connectors:
connections through a cross-connect block, wiring closet, or other
intermediary connection, the HP J2601B (24-port) and HP J2602B
(48-port) hubs have industry-standard 50-pin telco connectors.
To use a telco connector:
1. Attach the mounting hook included in the Accessory Kit (5063-4252)
to the threaded hole on the back of the telco plug. Be careful not to
overtighten the screw holding the hook.
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Installing the HP AdvanceStack 10Base-T Hubs
Push the RJ-45 plug into the RJ-45 jack
10 9 8 7 6 5 4 3 2 1 B
10Base-T
Hub-24
12 10 8 6 4 2
11 9 7 5 3 1
RJ-45 plug
unshielded twisted-pair cable
If you prefer to make your twisted-pair
mounting hook
50-pin telco plug
1/2-in 4-40 screw
1-15