3Com OfficeConnect 3C892A User Manual

Also see for OfficeConnect 3C892A: Getting started guide

Contents

3Com OfficeConnect 3C892A User Manual Manual pdf 106 page image

100 CHAPTER 9: TROUBLESHOOTING AND MAINTENANCEUnderstanding ISDNInformationThe ISDN statistics provided are as follows.Layer 1 status: Indicates whether layer 1 of the ISDN line is up or down.Depending upon your location, layer 1 functions in one of two possible ways. Insome locations, layer 1 will be down if no calls are connected. However, when acall is placed, layer 1 goes up. In other geographic areas, layer 1 is always up oncethe ISDN line is configured. That is, the ISDN LED remains lit once you configureyour ISDN telephone numbers and while the ISDN LAN modem is turned on.Therefore, layer 1 down may or may not indicate that there’s a problem with yourISDN line. If your ISDN LED remained lit after you configured your ISDN line andwhile you connected and disconnected calls, then layer 1 down indicates thatthere’s a problem with your ISDN line. You should contact your telephonecompany.Layer 2 status: Indicates whether layer 2 of the ISDN line is up or down. If Layer 2is down for more than a few seconds while layer 1 is up (click Update to verify),first make sure that your ISDN telephone numbers are configured accurately (clickISDN Parameters from the WebWizard main page). If your telephone numbers areconfigured correctly, check with your telephone company. There may be aproblem with your ISDN line.Understanding CurrentCall InformationThe current call information provided is as follows.Table 11ISDN Line Information DescriptionLayer 1 status Indicates whether layer 1 of your ISDN line is up or down.Layer 2 status Indicates whether layer 2 of your ISDN line is up or down.TEI Indicates the TEI value assigned to your ISDN line by yourtelephone company.Table 13 Current Call Information DescriptionCurrent CallInformationFor This CallType DescriptionCall type Data or voice Indicates the type of call (data or voice) and theB channel rate (56 Kbps or 64 Kbps).Call direction Data or voice Indicates whether the current call is incoming oroutgoing.Service provider name Outgoing data Indicates the destination to which the current call isconnected.IP address in use Data call Indicates the IP address assigned by the serviceprovider.Primary DNS address Outgoing data Indicates the primary DNS address of the serviceprovider to which the current call is connected.Secondary DNS address Outgoing data If a secondary DNS address is needed, indicates thesecondary DNS address of the service provider towhich the current call is connected. This field will beempty if a secondary DNS address is not needed.(continued)