Nortel Networks 7420 manual Power failure, Battery Precautions

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non-approved parts cannot be guar- anteed and may even cause damage.

Power failure

In the event of a power failure or flat battery, you cannot use the handset to make or receive calls

Battery Precautions

1.Periodically clean the charge con- tacts on both the charger and handset.

2.Exercise care in handling batteries in order not to short the batteries with conducting materials such as rings, bracelets, and keys. The batteries or conducting material may overheat and cause burns or fire

3.Do not open or mutilate the batter- ies, released electrolyte is corro- sive and may cause damage to the eyes or skin. The electrolyte may be toxic of swallowed.

4.During charging batteries heat up. This is normal and not dangerous

5.Do not use non-Nortel charging devices. This could damage the batteries

Notices

Before installing this equipment, users should ensure that it is permis- sible to be connected to the facilities of the local telecommunications com- pany. The equipment must also be installed using an acceptable method of connection. The customer should be aware that compliance with the above conditions may not prevent degradation of service in some situa- tions.

Repairs to certified equipment should be coordinated by a representative designated by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the telecom- munications company cause to request the user to disconnect the equipment.

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Contents Nortel Digital Mobility Handset User Guide Stop Contents Page Getting Started Handset informationBattery information Installing battery Charging battery Checking battery capacity Battery disposal Headset connector Microphone DisplayMenu key Active KeyIdle menu On hook idle Off hook activeHandset display Key On hook idleActive On/Off hook key ActivePage Display softkeys Display backlightTurning the handset ON/OFF Adjusting speaker volumeChanging Menu Language Customizing handset Profile set-upDescription of profile functions Language Dial directly On hook dialling pre-dialDial from your phone book RedialAnswering calls Hold a callMaking or answering a second call Mute a callTo answer a second call while on another call To hold a call and make a second callReplying to messages To view, reply and listen to your messagesMoving around in the Menu Menu structureRedial MENU, using the key See also Redial onMSF-MAIL Menu by pressing R with a long key press Using phone book Using the alphanumeric keyboardStoring a number Key Capital letter Small letterStoring from Redial list Reading Book numbersChanging numbers Deleting numbersUsing text messages MSF Deleting from Redial listReading a MSF mail Replying a MSF mail Forwarding a MSF mailDeleting all MSF mails Deleting a MSF mailLocking/unlocking a MSF mail Writing a MSF mailShortcuts SilentTroubleshooting InformationImportant Safety Instructions and Product Information Spare parts and accessories Intrinsic safetyExposure to sunlight, heat and moisture Power failure Battery PrecautionsPage Page Menu language Menu profile set-up Menu structure Menu mail Menu phone book storing a number Menu phone book reading, deleting, editing a number HD ED1