Manual
Operation and Troubleshooting
Appendix A
A4
Table A.B
LEDs Associated with the MAC Board
When this LED(s):
is: then:
IN-RING
ON green
this node is a member of the logical ring on the Data Highway II
link.
SEEKING
ON yellow
this node is trying to become a member of the logical ring, or
trying to build a logical ring in the case that a ring does not
already exist.
OFF
this node is not a member of a logical ring and is not seeking
membership
DUP ADDR
ON red another node has the same address on the Data Highway II
link. This condition also places this node into the disconnect
state.
REDUN W
ARN
1
ON yellow
a valid signal is being received at only one of the two Data
Highway II ports.
POR
T READY
ON green the on-board relay connecting the MAC board to the dropline is
closed.
SIG QUAL
ON green
a valid signal is being received at this Data Highway II port.
T
AP F
AIL
This LED is
not
used at this time, and will remain OFF
.
EXT T
AP CONFIG
This LED is
not
used at this time, and will remain OFF
.
POR
T READY
ON green the on-board relay connecting the MAC board to the dropline is
closed.
SIG QUAL
ON green
valid data is being received on Data Highway II.
ON red
a difference in data was noted between this port and the other
port, and this port was found to be in error
. Each detected error
causes this LED to be turned ON for one-half second.
OFF
no data is being received.
T
AP F
AIL
ON red
the extended tap has failed or its dropline connection to the port
has opened.
Important:
this LED can only go ON if the switch on the MAC
board is set for extended tap
2
1
This LED is only on the redundant module 1779-KP3R.
2
Extended taps are not available with this product release. Although these indicators are present,
they do not perform the functions at this time.