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.

• 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

• Connector interface panel (CIP) LEDs—Two small LEDs on left edge of the ETHERNET port on the CIP indicate the connection in use.

  Note: When RE-C1800 are installed, the LEDs are always yellow for both a 10-Mbps connection and 100-Mbps connection.

  See T640 Connector Interface Panel (CIP) LEDs.

• Control board LEDs—Three LEDs on each control board faceplate indicate the status of that control board. If no LEDs are lit, the control board is not receiving power.

  See T640 Standard Control Boards LEDs, T640 T Series Control Boards (T-CBs) LEDs, or T640 LCC-CB LEDs.

• PIC LEDs—Each port on each PIC has an LED that indicates the status of the port.

  See the T640 Core Router PIC Guide .

• SIB LEDs—Three LEDs on each SIB faceplate—ACTIVE, OK, and FAIL—indicate the status of that SIB.

  See T640 Switch Interface Boards (SIBs) LEDs

• SCG LEDs—Three LEDs on each SCG faceplate indicate the status of that SCG.

  T640 SONET Clock Generators (SCGs) LEDs

• Power supply LEDs—LEDs on each power supply faceplate indicates the status of that power supply.

  See the following documentation:

  • T640 Two-Input 160-A DC Power Supply LEDs
  • T640 Three-Input 240-A DC Power Supply LEDs
  • T640 Four-Input 240-A DC Power Supply LEDs
  • T640 Three-Phase Delta and Wye AC Power Supply LEDs