Nortel 2750, Installation Manual

Page: 46 / 108

46
Chapter 2 Cabling the VPN Router and turning the power on
NN46110-318 02.01
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
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.
56/64K
DDS
Bl u e LED
Yello w LED
Red LED
Green LED