LED Descriptions
Figure 8. 2124/2130 rear view
The status LED blinks yellow from one to eleven times to indicate system status. Each pulse pattern is separated by a 2 second "off " period. Greater pulse patterns have higher priority (buffer saturation has greater priority than an empty MAC table).
Valid system statuses are:
1 pulse | = system status ok | |
2 pulses | = No MAC entries in the MAC address table | |
3 pulses | = Clear to send (CTS) or Carrier Detect (DCD) from | |
|
| base unit are not asserted |
4 | pulses | = IMRC2/IA buffer is saturated |
5 | pulses | = WAN receive frame(s) too large |
6 | pulses | = WAN receive frame(s) not Octet aligned |
7 | pulses | = WAN receive frame(s) aborted |
8 | pulses | = Detected WAN receive frame(s) with bad CRC |
9 | pulses | = Detected LAN receive frame(s) too large |
10 pulses | = Detected LAN receive frame(s) not Octet aligned | |
11 pulses | = Detected LAN receive frame(s) with bad CRC | |
After a status code is displayed eight times and the associated condition is removed, the status code will no longer appear.
The link LED glows green to indicate link integrity on the 10BaseT twisted pair line.
Power and DCE/DTE interface LEDs
Seven LEDs indicate POWER and DTE/DCE activity on the front of the 2124/2130.
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