Contemporary Controls EISK5-100T/H Manual de instalación
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Skorpion Diagnostic Switch for Protocol Debugging
Installation Guide
The EISK5-100T/H is designed as an aid in diagnosing Ethernet communication
issues and debugging software. This device has all of the features of a normal
switch except that — like a repeating hub — it passes messages received by any port
to all other ports. This allows the activity of all ports to be monitored by a ―sniffer‖
attached to any port — an ability that would otherwise require the ―port mirror‖ function
of a more costly managed switch.
The five ports of the EISK5-100T/H offer features that traditional repeating hubs
do not. Each port supports Auto-MDIX — so either straight-through or crossover
cabling can be used. The collision domain is terminated at each port — so that a
network of EISK5-100T/H units has no cabling length limit — except that each
segment cannot exceed the 100 m specification for Ethernet. Store-and-forward
operation mitigates against lost messages. Each port automatically negotiates
its data rate to 10 Mbps or 100 Mbps — controlling data flow with the PAUSE
function in full-duplex links or with the backpressure method in half-duplex links.
Link integrity is monitored — verifying that a working device is on the far end of a
segment. In addition to the unit's power LED, each port has two LEDs — one
showing link/activity/rate, and one showing duplex status.
The unit operates from low-voltage AC or DC power and is provided with a
writable label for easy identification of the remote device attached to each cable.