3Com 980/000048/001 manual Front Panel LEDs

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2-6 CHAPTER 2: INSTALLATION AND OPERATION

Front Panel LEDs

This section describes the Triple Modem Module’s LEDs. Most of the LEDs can only be seen when the front door of the AccessBuilder 7000 chassis is open. When the door is closed, only the PWR, ALARM, ALERT and TEST LEDs can be seen. These LEDs show the status of the whole module.

The other status LEDs show information about one modem only. You can select the modem by toggling the push button at the foot of the module.

ANS (Answer) Lights to show that the selected modem is configured to automatically answer an incoming PSTN call. When an incoming call is detected, this LED flashes in sequence with each ring pulse.

TERM (Terminal) Shows that a DTE is attached to the selected modem’s DTE interface and that DTR is raised. It is normally used to indicate that a call can be made or an incoming a call answered. The modem may be configured to act in different ways on receipt of this signal according to the AT&D and AT&M commands. See AccessBuilder 7000 AT Command Reference for more information.

LINE (On Line) Indicates that the selected modem has seized the telephone line.

CONN (Connect) Indicates that the selected modem has established a valid connection to the remote device and is either negotiating the error correction and data compression protocols to be used on the link or it is ready to send and receive data. This LED does not indicate that the DCD (Data Carrier Detect) signal is high on the DTE interface.

CORR (Correct) Indicates that an error correcting link has been made with the remote modem. While using this facility, each time a re-send request is initiated by the selected modem the LED flashes for a short period.

COMP (Compress) Indicates that the data compression facility is active on the selected modem’s link giving you the maximum throughput speed. During a call, this LED may go out when the modem is using V.42bis compression if the modem determines that the link cannot benefit from compression.

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Contents Accessbuilder Triple Modem Module User Guide 3Com Corporation 5400 Bayfront Plaza Santa Clara, California Important Safety Information Wichtige Sicherheitshinweise ’INFORMATION DE Sécurité Importante Page Contents Modem Specification and Interface PIN Assignments Index Limited Warranty FCC Class a Verification Statement Page How to Use This Guide This table shows where to find specific informationAbout this Guide IntroductionIcon conventions that are used throughout this guide are ConventionsText conventions used in this guide are Additional Safety Information Keep the unit away from radiators and heat sourcesAbout this Guide Triple Modem Module Principal Features Support for dial-up transmission protocolsImplementation of V.32terbo Triple Modem Module Typical Applications Modem Connections To The Central SitePack Contents Checklist Registering Ownership of your Triple Modem ModulePre-installation Requirements Triple Modem Module Installation and Operation OverviewInstalling The Module Installing the Rear Card Installing The Rear CardInstalling the Front Card Example of Installing a Front CardConnecting the Cables Front Panel LEDs Front Panel LEDs Installation and Operation Troubleshooting Guide TroubleshootingModem Health Modem does not accept or echo back AT commands Modem DTE ConnectionModem Telephone Line Connection Troubleshooting Perform a local analogue loop test On-line Operation Dial Backup OperationPrivate-line Operation Transmitter / Receiver Specifications Modem SpecificationInterface PIN Assignments Autodial Autoanswer Physical Description ProtocolsApprovals Information General Approvals RequirementsAll the other apparatus shall comprise only Appendix a Modem Specification and Interface PIN Assignments Ringer Equivalence DTE Port Pin Assignments 21/V.1124/V.28 35/V.36 Pstn Port Cable Pin Assignments Private Line Port Cable Pin Assignments On-line Technical Services 3Com Bulletin Board ServiceWorld Wide Web Site Call the telephone number nearest youSupport from Your Network Supplier Support from 3Com Returning Products for Repair Appendix B Technical Support Index NumericsSend LED Limited Warranty 408 764-5000 3/18/96 How to Identify and Resolve Radio-TV Interference Problems