Black Box TS250A, Руководство пользователя, Страница: 24 / 64

Interpreting the Link and Speed LEDs
Chapter 2 Copper TAPs 24
rev. 1
3 Connected
. The Speed LED is on and the Link LED shows
activity. The Link LEDs flicker faster when there is more traffic
on the Link and slower when there is less traffic. The Analyzer
LEDs follow the Link LEDs. Because the TAP is passive, all
activity on the Link port is automatically and passively copied to
the Analyzer port and therefore the Analyzer port LED blinks at
the same speed as the Link port — even if an analyzer is not
connected.
10/100/1000 TAP
With a 10/100/1000 Mb Copper TAP, the TAP must be an active
participant in the negotiated connections between the network
devices attached to it. This is true if the TAP is operating at 10, 100,
or 1000 Mb. Power failure to the TAP results in the following:

If you are using a redundant power supply (Part # TC2P-K)
or the TAP is attached to an uninterrupted power supply, it
provides power with no loss of network connection.

If you are not using a redundant power supply or UPS or
power to both power supplies is lost, then:

The Analyzer ports stop working and the analysis
device(s) connected to the TAP will go “dark.”

The TAP continues to pass data between the network
devices connected to it (firewall/router/switch to server/
switch). In this sense the TAP is passive.

The network devices connected to the TAP on the Link
ports must renegotiate a connection with each other
because the TAP has dropped out. This may take a few
seconds.
When powered up, the TAP performs a sequence of steps to
determine whether its link ports are connected to any devices, and
what speeds and other capabilities those devices have. The blinking
pattern of the LEDs indicate which step of the connection process the
TAP is performing. The duration of each state depends on the type of
equipment attached to each port of the TAP. Here are the connection
steps, listed in the order they occur:
1 Capabilities search
. Both link ports/connections on the TAP are
attempting to attach to their respective devices and determine a