Black Box TS250A, Руководство пользователя, Страница: 48 / 64

Interpreting the Link and Speed LEDs
Chapter 4 Aggregator TAPs 48
rev. 1
Figure 12 Back panel showing power connectors and serial number
Interpreting the Link and Speed LEDs
When the TAP is powered up and correctly connected to functioning
devices, the Speed LED indicators simply show the connection speed.
The Link LED indicators are either lit steadily (idle) or flicker (data
transfer) depending on whether there is any traffic present.
Connection sequence
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
common speed and other capabilities. The LED pattern is that the
Speed LEDs flash and the Link LEDs flicker.
2 Connecting
. The link parameters are attempting to connect using
the parameters determined during the Capabilities search. The
LED pattern is that the TAP shows the connection speed while
the Link LEDs continue to flicker.
3 Connected
. Both link ports/connections are connected to the link
partners at a common speed. The Speed LED shows connection
speed. The Link LEDs light steadily (idle) or flicker depending on