Contents

Important Safety Instructions …………………………………………………..………....4

Installing Your Phone …….………………….. ……………………………………………4

Telephone Operation

Making and Receiving calls …………………………...…………………. ………………5

Speakerphone……………………..…………..…………………….…………. ……....5

Call Timer…………………………………………………………………..……………….6

LCD Backlight Display ..…………………………………..………………………….....6

Connecting An Optional Headset…………..……………………………………….....6

Muting A Call….…………………………………………………………………………....6

Placing A Call on Hold….…………………………………………………………………...6

Music On Hold…………….…………….……………………………………...………....6

Using Flash………………….…………………………………………………………….6

Using Tone Service on A Pulse Line………………………………………………......6

Programming The Emergency Buttons…………………………………………..……….6

Amplification Features

Incoming Voice Volume…………………………………………………….....……….…...7

Incoming Voice Tone….…………………………………………………….....……….…...7

Ringer Volume………………….. ………………………………………….....……….…...7

Speaker Volume……………. ..…………………………………………….....……….…...7

Handset Volume…………………………………………………………….....……….…...7

Handset Tone………….…………………………………………………….....……….…...7

Adjusting Ringer Tone…. ………………………………………………….....……….…...7

Memory Operation

Storing An Entry…………….…………………………………………………..…………...7

Pause………………………………………………………………………………...……….8

Review A Number From the Memory ..…………………………………………………....8

Dialing A Number From the Memory…..…………………………………………………..8

Using The One-Touch Speed Dial Memory……. .………………………………...……..9

Changing A Speed Dial Number…….……………………………….....………………....9

Cloning A speed Dial Number………………………………………..…………………….9

Deleting A Speed Dial Number………………………………..................………………..9

Deleting All Memory Entry………………………………..................………… . ………..9

Redial………………………………………………………………………………………....9

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Cortelco 2420 instruction manual Contents