3SYSTEM TONESThe system provides several tones to assist you. Some of these tones are already familiarto you.Dial Tone—A steady tone that indicates you can begin dialling.Ringback Tone—Indicates the station you dialled is ringing.Busy Tone—Indicates the station you dialled is busy.DND/No More Calls Tone—Fast busy tone indicates the station you dialled is in Do NotDisturb mode or cannot receive any more calls.Transfer/Conference Tone—Indicates your call is being held and you can dial anothernumber.Confirmation Tone—Very short beeps followed by dialling tone indicates you have cor-rectly set or cancelled a system feature.Error Tone—A distinctive two-level beeping tone indicates you have done something in-correctly. Try again.NOTE: These system tones apply to phones in the UK. They may be different for users in othercountries.SYSTEM ACCESS CODESYour system is configured with default system access codes for using the various featuresdescribed in this guide. These codes are also printed at the back of this guide for quickreference. However, your system may have been set up to use a different set of codes.Moreover, the availability of some features depends on the type of DCS keyphone systemto which your phone is connected. Therefore, if your phone does not work as described inthis guide, see your system administrator for advice.A ‘Changed System Access Codes’ table has also been provided at the back of this guidefor you to enter the codes required by your system, if they are different from the defaultcodes.