Battery Replacement, Power Failure Operation | Cortelco 2740

7.Batteries

7.1Battery Replacement

a.Make sure the AC cord is attached to the telephone and to a working electrical outlet.

b.Turn the telephone over.

c.Remove desk pedestal/wall mount bracket if attached.

d.Remove battery door cover by using the tip of a ball-point pen, or paper clip, or similar object to release the battery door tab.

e.Remove the old battery.

f.Insert 3 newAAAsize alkaline batteries. Note that we recommend ONLY alkaline batteries.

g.Close the battery cover.

7.2Power Failure Operation

Your 2740 telephone uses AC power from a standard wall outlet. As long as the telephone is connected to a wall outlet, it will operate using the AC power. Please remember to plug your telephone into a wall

outlet that is not controlled by a wall switch.

IfAC power is disconnected or there is a power failure, the telephone automatically switches to battery operation for approximately two hours. When the power is restored, the telephone automatically switches back to AC power and resumes normal operation.

If the battery is missing or low on power whenAC power is lost, the telephone will not function. However, all feature settings and memory numbers will be maintained.

Note: It is recommended to always have at least one telephone connected that does not require battery power, so that you are always sure to have use of a telephone during a power failure.

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Cortelco 2740 Battery Replacement, Power Failure Operation, Outlet that is not controlled by a wall switch

Contents

OWNER’S Instruction Manual Table of Contents Using standard telephones Thank YOU For Purchasing Important Safety Instructions Box Contents Unpacking and Installation Telephone Part Identification Installations with Private Lines and Unconnected Lines Installation Identify Your Existing Wiring SystemPlan Your Installation Standard Installation Assign a Station Number Install Batteries Optional Station NumberAssignment Verify Proper InstallationConnect Cords to Telephone Change Station Name Assignment Loop Voltage Detector Line ConfigurationCommon To choose how each line will ring Ringer ConfigurationSetting Distinctive Ringing Intercom Call Response and Paging Setting Off-Hook Ringing Automatic Line Selection To choose how your phone will respond to intercom callsTo block pages at your telephone Toll Restriction To set the allowed numbers at a particular telephone To completely restrict specific lines at a telephone System Privacy To Change the Privacy Setting At Station #01Dialing Mode Storing a hyphen into memory Memory FeaturesArea Codes To enter HOME, LOCAL, and 1 Plus 7 area codes To store a memory dial number Storing temporary tone dialing into memoryStoring one of the last five numbers dialed into memory Storing a Caller ID number into memory To Store the Centrex prefix To Store Caller ID Calls Message Waiting Lamp Message Waiting Mode SelectionTime and Date Press Down Arrow Held Call Reminder Adjusting Auto Hold Drop TimeAdjusting Flash Length Caller ID on Call Waiting Cidcw Sensitivity Making and Answering Calls Erase All Feature SettingsErase Numbers Stored in Memory Erase Toll Restrictions At station #01 Making a call on another line Redial To redial the last phone number dialedTo redial any of the last five phone numbers dialed Hold Placing a Call on Hold Transfer Attended Transfer ConferenceOutside Calls Outside Call with Intercom Station Incoming call Transfer RingPersonal Ring Caller ID Ringer Volume LevelsVoice Mail Message Waiting Accessing Messages Deleting Numbers Do Not Disturb DND Resetting MSG LampFlash Mute Toll Restriction Removal Single Station Line ReserveCall Privacy Toll Restriction Removal Single Call Headset Timer Elapsed Call TimeTimer Reset Elapsed Call Time Previous Calls Intercom while Idle Personal DirectoryPredialing Intercom Calls Paging Intercom VoiceIntercom Handsfree Answering an Intercom Call while on an Outside Call Fax Machines and Modems Line Status and Calls on HoldIntercom Outlet that is not controlled by a wall switch Battery ReplacementPower Failure Operation Top Level Phone Setting Menu Menu Option SUB Menu Default Available OPTIONS/COMMENT Time/Date Set Memory Setting Menu Advanced Setting Option FCC Information Telephone Repair Limited Warranty