Brim leds – Nortel Networks BCM50 User Manual
Page 68
68
Chapter 3 Viewing the BCM50 system LEDs
NN40020-302
BRIM LEDs
The BRIM has one additional LED beside each RJ-48C jack. These LEDs are on when the ISDN
line is active. The figure
on page 68 shows the location of the LEDs on a BRIM.
Figure 32 BRIM LEDs
For more information on the power and status LED functions, see
In service
Flashing
The T1, ETSI, or PRI trunks are out of service because a loopback test is
running or the DTM is initializing.
Loopback test
On
A continuity loopback test is running.
Receive alarm
On
A problem with the received digital transmission. This half-duplex link does
not work.
Receive error
On
A small error as a result of degraded digital transmission. Possible causes are
an ohmic connection, water ingress, or too long a loop.
Transmit alarm
On
The DTM cannot transmit. The DTM sends an alarm indication signal (AIS) to
the terminating switch. This half-duplex link does not work.
Transmit error
On
The DTM is sending a remote alarm indication (RAI) carrier failure alarm
(CFA) to the terminating switch. If the transmit alarm is not on, this error
indicates a far-end or cable problem.
All LEDS
Flashing
The DTM is initializing.
Table 15 DTM LED functions (Sheet 2 of 2)
LED Status
Descriptions
Power LED
Status LED