Nortel Networks 7420 manual Troubleshooting, Information

Page 37

General information

Troubleshooting

The telephone freezes.

Remove and replace the battery pack.

Press to turn on the telephone.

The telephone does not ring.

Check whether the ringer is SILENT or RINGER VOL. is OFF.

Not possible to turn on the telephone.

Check if battery is connected. If yes, charge the battery.

The telephone turn off when receiving a call and going off-hook.

Charge the battery. If still a problem change the battery as it might be defective.

Information

Error information

Improper function of the handset might be related to the installation of the DMC system or failures related to the main system.

Before declaring a handset for repair be sure that the main system is oper- ating properly.

Technical specification

Size and weight

Size: 143 x 48 x 26 mm

Weight: 121 g incl. battery ± 10 g

Capacity

Active talking time 12 hours

Stand-by time 120 hours

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Contents Nortel Digital Mobility Handset User Guide Stop Contents Page Handset information Getting StartedBattery information Installing battery Charging battery Checking battery capacity Battery disposal Display Headset connector MicrophoneActive Key Menu keyIdle menu On hook idle Off hook activeKey On hook idle Handset displayActive On/Off hook key ActivePage Display backlight Display softkeysTurning the handset ON/OFF Adjusting speaker volumeChanging Menu Language Profile set-up Customizing handsetDescription of profile functions Language On hook dialling pre-dial Dial directlyRedial Dial from your phone bookHold a call Answering callsMute a call Making or answering a second callTo answer a second call while on another call To hold a call and make a second callTo view, reply and listen to your messages Replying to messagesMenu structure Moving around in the MenuSee also Redial on Redial MENU, using the keyMSF-MAIL Menu by pressing R with a long key press Using the alphanumeric keyboard Using phone bookKey Capital letter Small letter Storing a numberReading Book numbers Storing from Redial listDeleting numbers Changing numbersDeleting from Redial list Using text messages MSFReading a MSF mail Forwarding a MSF mail Replying a MSF mailDeleting all MSF mails Deleting a MSF mailWriting a MSF mail Locking/unlocking a MSF mailSilent ShortcutsInformation TroubleshootingImportant Safety Instructions and Product Information Spare parts and accessories Intrinsic safetyExposure to sunlight, heat and moisture Battery Precautions Power failurePage 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