GS4000 Installation Guide Revision 4.00
520-10-026-30X
1-66
(16) NP48-4S
The NP48-4S is a Network Interface providing 4 OC-48c POS interface ports.
*
NOTE: SFP is required when using NP48-4S. See the section 1.8 “GBIC, SFP, and
XFP” for information about SFP.
Front View
The LED indicators are listed in Table 1.6-17
Figure 1.6-17 Front view of NP48-4S
LEDs
Table 1.6-17 LED Indications on the NP48-4S Front Panel
Name
Color
Role
Action status
STATUS Green/Yellow/Red
Shows the action
status of NIF.
Green (ON): operation possible.
Yellow (ON): locked out
Green (blinking): in preparation for startup
Red (ON): failure detected
OFF: NIF powered off
（
NIF exchangeable
）
LINK : 0
～
3 Green/Yellow
Green (ON): line operation possible
（
line is open
）
Yellow (ON): failure detected
Yellow (blinking): network loopback being tested
OFF: Locked out.
R: 0
～
3
Green
Green (ON): frames being received
T: 0
～
3
Green
Shows the action
status of an
interface line.
Green (ON): frames being sent
U
S2 Green
U
S3 Green
D
S2 Green
D
S3 Green
Shows the processing status of packets (for hardware debugging).
OC-48c POS Interface Port
LEDs
