Mitel IP8630M Operation Manual page 38

For example a positive confirmation sound is generated when a new setting is set or an entry is saved
successfully in the phonebook. A negative confirmation sound is generated if the action fails.
When the confirmation sound is set to "Off" no sounds is generated in either case.
6.5.1.9 Coverage Warning
A coverage warning can be set to occur when the handset is out of range of a base station in the
system.
When the feature "Coverage warning" is enabled (On) an audible indication is given in the earpiece of
the handset when the user is close to the maximum range of the nearest base station in the system.
Hereby, the user knows that the call is at the edge of the possible coverage of the call, and that the
user has to move back in coverage to keep the call going.
NOTE: This feature is only working when the handset are in call. Not when in idle.
6.5.1.10 Charger Warning
"Charger Warning" is a feature that enables the handset to make a sound when put in the charger to
indicate that the handset is charging.
When the feature "Charger warning" is enabled (On), then an audible indication will be given when the
handset is correctly connected to the charger.
If the feature is set to "Off" no audible indication will be given as the handset is put in the charger.
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