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Magnum 6K32 & 6K32T Managed Switch Installation and User Guide (12/05)
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3.2.5 Connecting Twisted Pair (CAT-5e or better, Unshielded or Shielded)
The RJ-45 1000BASE-TX Gigabit ports of the Magnum 6K32T can be
connected via copper media with the following minimum specifications; 1000BASE-T,
CAT-5e, or for better results, 100-ohm UTP shielded twisted pair (STP) balanced cable.
The CAT-5e or the more effective 100-ohm UTP shielded twisted pair (STP) balanced
cable is recommended when making 1000BASE-TX connections. In either case, the
maximum distance for unshielded twisted pair cabling is 100 meters (328 ft).
Media
IEEE Standard Connector
Twisted Pair (CAT-5e) 1000BASE-T RJ-45
NOTE : It is recommended that high quality CAT-5e cables (which work for both 100
Mb and 1000Mb) be used whenever possible in order to provide flexibility in a
mixed-speed network.
The following procedure describes how to connect a 1000BASE-T twisted pair segment
to the RJ-45 port. The procedure is the same for both unshielded and shielded twisted
pair cables.
1. 1000BASE-T connections require that all four pairs or wires be connected. Insert
either end of the cable with an RJ-45 plug into the RJ-45 connector of the port.
Note that, even though the connector is shielded, either unshielded or shielded
cables and wiring may be used.
2. Connect the other end of the cable to the corresponding device
3. Use the LINK LED to ensure proper connectivity by noting that the LED will be
illuminated when the unit is powered and proper connection is established
3.2.6 Power Budget Calculations for Magnum 6K32T PM’s with Fiber Media
Receiver Sensitivity and Transmitter Power are the parameters necessary to
compute the power budget. To calculate the power budget of different fiber media
installations using Magnum products, the following equations should be used:
OPB (Optical Power Budget) = P
T
(min) - P
R
(min)
where P
T
= Transmitter Output Power, and P
R
= Receiver Sensitivity
Worst case OPB = OPB - 1dB(for LED aging) - 1dB(for insertion loss)
Worst case distance = {Worst case OPB, in dB} / [Cable Loss, in dB/Km]
where the “Cable Loss” for 62.5/125 and 50/125
m (M.m) is 2.8 dB/km,
and the “Cable Loss” for 100/140 (Multi-mode) is 3.3 dB/km,
and the “Cable Loss” for 9/125 (Single-mode) is 0.5 dB/km
and the “Cable Loss” for 9/125 (Single-mode) is 0.4 dB/km (LXSC25)
and the “Cable Loss” for 9/125 (Single-mode) is 0.25 dB/km
(LXSC40)
and the “Cable Loss” for 9/125 (Single-mode) is 0.2 dB/km (LXSC70)
The following data has been collected from component manufacturer’s (Agilent’s and
Lucent’) web sites and catalogs to provide guidance to network designers and installers.