Black Box COMPACT T1 MT850A - Manual (Page 426)

10-10 Compact T1 - Release 6.1
OCU-DP Card
LEDs
LEDs
There are two LEDs for each channel on the OCU-DP card. The function for each LED
is listed below:
State Description
Yellow Flickering ALL Boot Software in control.
Green (walking down)
Red (walking up) ALL Application Software in control
(repeated 3.5 times).
Red, slow flash ALL In Boot. Application flash code
checksums did not match and Boot is
waiting for application download.
Red ALL In Application code waiting for
Controller to issue SW/HW revision
request. This is the first request that
comes from the OCU-DP card manager
in the Controller.
Green
Yellow Top
Bottom Port in Self-test. Duration is 5-8
seconds.
Off Top
Bottom Port is set down (Out-Of-Service).
Green Top Port is receiving valid signals.
Red Top Port is receiving no signal (primary) or
no frame sync (secondary or clear
channel).
Red Flashing Bottom Port is receiving bipolar violations
Yellow Bottom Port is in loopback.