Ross NK-3G144, User Manual, Page: 49 / 64

NK-3G144 User Guide (v04) Operating a Routing Switcher • 49
Operating a Routing Switcher
A routing switcher responds to switch commands from NK Series control devices. These commands contain
source, destination, and level designations. Routing switchers respond to the control device with its new crosspoint
switch status.
NK Series control devices include remote control panels, DashBoard NK Switchboard, the virtual control panel
(NK-VCP), NK-GPI, NK-SCP/A and NK-SCP/K2.
For More Information on...
• NK Series control devices, see the documentation provided with the control device.
LED Indicators
LED indicators are used to check the current operating status of a routing switcher. The primary Heartbeat LED
indicator is situated on the front panel of a router in the name badge. The NK-3G144 has additional LEDs on power
supplies and all of the cards. Details of the status of each LED are provided below.
Heartbeat LED
The front panel of the NK-3G144 has a Heartbeat LED. Following power-up, this LED flickers while the
NK-3G144 is initializing.
During normal operation, the LEDs indicate the flow of requests and responses between the remote control panel
and the routing switcher.
Input Card LEDs
Table 6.1 Indicators for the Heartbeat LED
Color Status Function
Green Flicker The routing switcher has performed a valid switch or protect
request.
White Pulse every 5 s The CPU is running.
Blue Flicker The routing switcher has received a message.
Red Flicker The routing switcher has not performed the switch or protect
requested because it has been blocked by a protect or there is
an error.
Pulse every 2.5 s An alarm condition is current.
Green, white, blue
or red Solid The CPU is not operating correctly.
Table 6.2 Indicators for the Input Card LEDs
LED Status Function
PWR Green, solid 3.3 V is present on the input card.
FUSE Red, solid An overcurrent condition on the 15 V supply is present.
TEMP Red, solid The temperature of the input card is above 80°C.