Cortelco 2757 manual

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2. Press ‘Up’ or ‘Down’ until ‘3. Settings’ is selected, then press ‘Select’.

3. Press ‘Up’ or ‘Down’ until ‘3. Contrast’ is selected, then press ‘Select’.

4.Press ‘Up’ to make the displayed messages darker. Press ‘Down’ to make the displayed messages lighter. Press ‘Save’ keep the new settings.

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Contents VoIP Phone Users Guide Table of Contents 10.1 Recover from Unsuccessful Firmware Update Package Contents FeaturesBasic Setup Page Network Setup Static IP AddressPage Described above to enter the subnet mask PPPoE Page Page Page Dhcp Page Network Setup Web Configuration Display IP AddressWeb Interface Network Configuration Page Page SIP Server Information Setup Page Page Page SIP Server Information Setup Web Configuration Page Accepting and Making Phone Calls Accepting phone callsTransfer Trfr In-Call OptionsAttended Transfer 2.2 3-way Blind TransferPage Making phone calls LineHold Caller ID on Call Waiting Calling History Placed Calls Missed CallsReceived Calls Unanswered CallsReceiving Calls Call Rejection DNDPlacing Calls Speakerphone and HeadsetSpeed Dial HeadsetAdvanced Settings Call ForwardingForward Timer Handset Volume/Handsfree Volume/Headset VolumeRing Volume End of Dial KeyNTP Server Address Entry of Call Forward numbers from phoneSet Time Zone Phone Book Management Web InterfacePhone Interface Page Browse System Information LCD screenClick ‘Status’ Page Change Display Language Change Ringer Type Adjust the Contrast of LCD Screen Page Reboot the IP Phone Click on ‘Management’ Factory Reset Click ‘Management’ Change Password for the Web Interface Troubleshooting Firmware Update Upgrade ProcedureRecover from Unsuccessful Firmware Update