3Com 3C892 - OfficeConnect ISDN Lan Modem Router User Manual

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Contents

3Com 3C892 - OfficeConnect ISDN Lan Modem Router User Manual Manual pdf 25 page image

26 CHAPTER 3: HARDWARE DESCRIPTION AND INSTALLATIONFront Panel LEDDescriptionThe front panel provides the following LEDs.Figure 11 ISDN LAN Modem Front PanelThe functions of the front panel LEDs are described in Table 4. These front panelLEDs show whether or not the unit is functioning properly and indicate the statusof the activity over the 10BASE-T and ISDN ports.Table 4 Front Panel LED Indicator DefinitionsLED Color DescriptionAlert Amber Operational Status. Lit during power-on self-test diagnostic orafter pressing the reset button.Off indicates the unit has passed the diagnostic tests and isworking properly.Flashes (four times per second) if one or more of the diagnosticshave failed or after the unit is placed in firmware download modeand is waiting for a firmware upgrade.Flashes (once per second) toindicate there are pending voice mail messages.POWER Green Power Indicator. Remains lit as long as power is supplied to theunit.ISDNOKGreen D Channel Status. Indicates the status of the ISDN physicalnetwork interface and D channel.Remains lit once the physical ISDN interface and D channelsignaling are synchronized.Off indicates the physical ISDN interface is not synchronized or isdisconnected.Flashes when the physical interface attempts synchronization orwhen the ISDN D channel parameters have changed.B1/B2 Amber orGreenB1/B2 Channel Activity. Green indicates a data call in progress.Amber indicates a voice call in progress. If a call is in a dialing state,the LED flashes. When the call is disconnected, the LED goes off.Tx Green Ethernet Transmit Status. Flashes green when data is beingtransmitted to the Ethernet LAN from the ISDN LAN Modem.Off indicates no data is being transmitted to the Ethernet LANfrom the ISDN LAN Modem.Coll Amber Ethernet Collision Status. Flashes amber when some collisionsare taking place on the Ethernet LAN.Off indicates no collisions are taking place on the Ethernet LAN.Ports1—4 Green Ethernet LAN Port Status. On indicates the unit detects theEthernet link integrity signal from an attached computer andoperation is normal.Flashes when the LAN Modem is receiving data on that port.Off indicates the unit does not detect the Ethernet link integritysignal. The Ethernet cable may not be properly connected or thecable may be the wrong polarity.POWER ISDNAlert B1 B2 TX COLL 1 2 3 43 ComLAN STATUSISDN LAN Modem3C892OK