Nortel Networks 2750 manual 56/64K CSU/DSU WAN interface card LEDs

46Chapter 2 Cabling the VPN Router and turning the power on

56/64K CSU/DSU WAN interface card LEDs

Figure 14 shows the LEDs on the 56/64K CSU/DSU WAN interface card.

Figure 14 LEDs on the 56/64K CSU/DSU WAN interface card

Blue LED Red LED

56/64K

DDS

Green LED Yellow LED

Table 10 describes the LEDs on the 56/64K CSU/DSU WAN interface card.

Table 10 LED indicators on the 56/64K CSU/DSU WAN interface card

LED	Description
Blue	The blue alarm LED is lit when the interface card detects a DDS
	out-of-frame (OOF) condition on the receive signal.
Red	The red alarm LED is lit when the interface card detects a DDS loss-of-
	signal (LOS) or loss-of-frame (LOF) condition on the receive signal.
Yellow	The yellow alarm LED is lit when the interface card detects a DDS
	out-of-service condition on the receive signal. (This LED indicates that
	the far-end equipment detects a local LOS or LOF condition.)
Green	The green LED is lit when the interface card receives valid DDS signal
	and framing (this LED indicates normal operation of the card.)
All LEDs off	The port is disabled.

NN46110-318 02.01