Circuit Pack LEDs
Issue 1 May 2002
6-13555-233-143
The bottom four LEDs on the TN1654 board are labeled SPAN LEDs. These
LEDs are under firmware control. If the facility is not administered, then the LED
is not lit. The LED is lit amber if the facility is running alarm free. If the facility is
detecting either a red alarm (loss-of-signal or loss-of-frame), a yellow alarm
(remote frame alarm) or a blue alarm (AIS signal) then the LED is lit red. The
SPAN SELECT switch on the TN1654 faceplate is for future use. Pushing the
switch will have no effect on the board. See Figure 6-3 on page 6-13 for a view of
the faceplate on the TN1654 DS1CONV circuit pack.
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Figure 6-3. TN1654 DS1CONV Circuit Pack
INSET
0015_0 RBP 052396
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