Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

T640 LED Overview

 

Craft Interface LEDs

The craft interface is the panel on the front of the router that displays system status messages and allows you to troubleshoot the router. The craft interface is located at the top of the chassis above the FPC card cage. It contains LEDs, buttons, and an LCD showing status messages for the router.

To display system alarm messages on the LCD, see T640 Alarm Messages Overview. For more information about using the craft interface, see T640 Craft Interface Description.

LEDs on the craft interface include:

  • Host subsystem LEDs—Three LEDs (one green MASTER, one green OK, and one red FAIL) indicate the status of each host subsystem. The host subsystem LEDs are located on the upper right of the craft interface, and are labeled HOST0 and HOST1.

    See T640 Craft Interface Host Subsystem LEDs.

  • SIB LEDs—Two LEDs (one red FAIL and one green OK) indicate the status of each SIB. The SIB LEDs are located on the upper right of the craft interface, and are labeled SIB0 through SIB4.

    See T640 Craft Interface SIB LEDs.

  • FPC LEDs—Two LEDs (one red FAIL and one green OK) indicate the status of each FPC. The FPC LEDs are located along the bottom edge of the craft interface, and are labeled FPC0 through FPC7.

    See T640 Craft Interface FPC LEDs and Online/Offline Buttons.

  • Alarm LEDs—One large red circular LED and one large yellow triangular LED, located on the upper left of the craft interface, indicate two levels of alarm conditions. You can determine the cause of the alarm condition by looking at the LCD on the craft interface.

    See T640 Craft Interface Alarm LEDs and ACO/LT Button.

Component LEDs

The following LEDs are located on various router components and display the status of those components: