WATERS NETWORK SYSTEMS
ProSwitch-Xtreme Operating Manual
Page 7
5.3.1 Connecting Twisted Pairs
The following procedure describes how to connect a 10BASE-T or 100BASE-TX twisted pair segment to the
RJ45 port. The procedure is the same for both unshielded and shielded twisted pair cables.
1. Using standard twisted pair media, insert either end of the cable with a RJ45 plug into the RJ45 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. If this does not help, ensure that the cable is connected
properly and that the device on the other end is powered and is not defective.
4. For Port # 1 or 1SW, if the LINK LED is not illuminated, move the switch that has a crossover or up-link for
linking to another hub or switch.
5.3.2 Connecting Fiber Optic SC-type "Snap-In"
The following procedure applies to installations using SC-type fiber connectors. This procedure applies to ports
using multimode SC fiber connectors.
1. Before connecting the fiber optic cable, remove the protective dust cap / plug from the end of the fiber
connectors, exposing the ports opening. Save the dust cover / plug for future use in case the fiber cable needs
to be unplugged for service.
2. Wipe clean the ends of the dual connectors with a soft cloth or lint-free lens tissue dampened in alcohol. Make
certain the connectors are clean before connecting. Then, insert the square male connector into the SC female
jack of the Fiber port connector until it clicks and secures.
3. Note:
One strand of the duplex fiber optic cable may be coded using color bands at regular intervals; you
should see the color-coded strand on the associated ports at each end of the fiber optic cable segment
.
4. Connect the Transmit (TX) port on the ProSwitch-Xtreme fiber port to the Receive (RX) port of the remote
device. Begin with the color-coded strand of the cable for this first TX-to-RX connection.
Note – the two male
square-end SC cable strands may be fastened together to plug as a unit.
5. Connect the Receive (RX) port to the Transmit (TX) port of the remote device. Use the non-color coded fiber
strand for this.
6. The LINK LED for the fiber connector will illuminate when a proper connection has been established at both
ends (and when power is ON in the unit). If LINK is not lit after cable connection, the normal cause is improper
cable polarity. Swap the fiber cables at the fiber connector to remedy this situation.
5.3.3 Connecting Singlemode Fiber Optic
When using singlemode fiber cable, be sure to use singlemode fiber port connectors. Singlemode fiber cable
has a smaller diameter than multimode fiber cable (9/125 microns for singlemode, 50/125 or 62.5/125 microns for
multimode where xx/xx are the diameters of the core and the core plus the cladding respectively). Singlemode fiber
allows full bandwidth at longer distances, about 20km with the singlemode SC.
The same procedures as for multimode fiber apply to singlemode fiber connectors. Follow the steps listed in
Section 5.3.2 above.
5.3.4 Power Budget Calculations for Xtreme 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 ProSwitch 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
µ
m (m.m.) is 2.8 dB/km,
and the “Cable Loss” for 100/140 (multimode) is 3.3 dB/km,
and the “Cable Loss” for 9/125 (singlemode) is 0.5 dB/km
