© 2017 Datacom Systems Inc
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SS-1200, SS-2200, SS-4200 Series USERguide
3.4.2
Copper Network Port Pairs
Copper Network port pairs are used to connect to endpoints on each end of the link allowing the
SINGLEstream™ to non-intrusively make a copy of network traffic. For example, to access
network traffic between a switch and a firewall, NET port 1 connects to a switch, while NET port
2 connects to a firewall.
Each port pair has an internal built-in relay that protects the network link in the rare instance of a
power outage. If a power outage occurs on both redundant power supplies, the relay will fail open,
allowing network traffic to directly pass between network endpoints.
3.4.3
Fiber TAP Port Pairs
These ports are used to passively tap a network link, allowing the SINGLEstream™ to non-
intrusively make a copy of network traffic. For example, to access network traffic between a
switch and a firewall, NET port 1 connects to a switch, while NET port 2 connects to a firewall.
Due to the passive connection to the network, configuration changes and power loss have no effect
on the link state, or the traffic going over the link
Correct Wiring:
When installing a Fiber Tap, it is important to make sure that the Tx and Rx
fibers are connected to the respective ports on the Fiber Tap. When wired correctly, the traffic
incoming on an Rx port will be split before being sent to two separate Tx ports (One copy to the
other Network device, the other copy to Monitor).
Reverse Wiring:
If the fibers are connected backwards, light will not be received on the
monitoring port. This is because the internal coupler that splits the light is unidirectional.
