100Mb Fiber Ports, Sc Connectors; Frame Buffering And Latency - GarrettCom Magnum ITS Blade Installation And User Manual

Magnum ITS Blade Hardened Switches for 2070's
and improve operating lifetime and reliability. Ambient temperatures can be from -40°C to
+75°C. The extreme temperature Ethernet technology is derived from the proven design of the
companion products, the Magnum P62 Switch family, already widely in use in Traffic Control
Systems and other Outdoor Industrial Ethernet LAN applications.
The Magnum ITS Blade is available in three different TC62F models to suit
installations using multi-mode, single mode or combinations of these two connectors. All
models are specially designed for high reliability and EMI noise immunity.
2.3

100Mb Fiber ports, SC Connectors

The Fast Ethernet fiber switched ports on the Magnum ITS Blade operate at fixed 100Mb
speed and full-duplex mode for the best performance. The ITS Blade's fiber ports are factory-
built as either a multi-mode or single-mode SC connectors. A yellow label on the fiber port
connector will indicate if it is single-mode . . . otherwise it is a multi-mode port. The 100Mbps
fiber ports are each a switched port and perform as a domain, providing a high bandwidth
backbone connection and supporting long (up to 20km single-mode, or 40km special "long-
reach") fiber cable distances for installation versatility.
port's cable and a proper link (LK lit) must be made with the device at the other end of the cable
in order for each LINK LED to provide a valid indication of operating conditions.
2.4

Frame Buffering and Latency

The Magnum ITS Blade is a store-and-forward switch. Each frame (or packet) is
loaded into the Switch's memory and inspected before forwarding can occur. This technique
ensures that all forwarded frames are of a valid length and have the correct CRC, i.e., are good
packets. This eliminates the propagation of bad packets, enabling all of the available bandwidth
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On each Magnum ITS Blade, there are three LED's
for each of the RJ-45 switched ports. The F/H indicates full
duplex when ON; when it is OFF, operation is half-duplex.
One (LK/ACT) is steady ON to indicate LINK, and blinking
indicates the port is transmitting / receiving. The 10/100 LED
is ON for 100Mbps and OFF for 10 Mbps (when LINK is
made). For fiber ports, the LEDs are the same except no F/H
(and 10Mb is not possible).
A device must be connected to the other end of a
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Installation and User Guide (02/03)