44 Hardware maintenance toolsCircuit card LEDsMany circuit cards have one or more LEDs on the faceplate. The LED givesa visual indication of the status of the card or of a unit on a card.When a green LED is steadily lit, the card is operating normally. When agreen LED is off, the card is disabled or faulty.When a red LED is steadily lit, the card, or a unit on it, is disabled, faultyor unequipped.When a red LED is off and power is available to the card, the card isoperating normally.Media Card LEDsThe Media Card faceplate provides the following LEDs.Status LEDThe Media Card faceplate red LED indicates the following:• the enabled/disabled status of the card• the self-testing result during power up or card insertion into anoperational systemEthernet activity LEDsThe Media Card faceplate contains Ethernet activity LEDs for each subnet.The faceplate contains six Ethernet activity LEDs, three for the ELAN subnetand three for the TLAN subnet. The LEDs indicate the following links on theELAN and TLAN subnets (in order from the top):• 100 (100BaseT)• 10 (10BaseT)• A (Activity)Maintenance hex displayThe four-digit LED-based hexadecimal display provides the status of theMedia Card at all times. The hex display provides an indication of faultconditions and the progress of PC Card-based software upgrades orbackups. See Table 36 "Media Card faceplate maintenance display codes"(page 162) for a description of the hex display codes.The Maintenance display also indicates the progress of the internal self-testin the form of T:xx.Nortel Communication Server 1000Communication Server 1000E MaintenanceNN43041-700 01.02 StandardRelease 5.0 20 June 2007Copyright © 2007, Nortel Networks.
