Nortel Contivity Extranet Switch 2500 Getting Started page 30

Getting Started with the Contivity Extranet Switch 2500
LED 3, G reen
Table 2-7.
LED
LED1, Yellow
LED2, Blue
LED3, Green
LED4, Red
2-14
LE D 4, R ed
LED 2, Blue
LED 1, Yellow
Figure 2-6.
T1 CSU/DSU LED Indicators
Description
Yellow alarm LED is lit when the far-end
equipment is in the red alarm condition.
Blue alarm LED is lit when receiving an
upstream failure denoted by an alarm
indication signal (AIS).
Normal operation.
Red alarm is lit when a loss-of-signal (LOS) or
out-of-frame (OOF) condition is detected on the
receive signal.
T1 CSU/DSU LEDs