AT&T GL2101-2 - Handset Alert Tones

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Appendix
Screen icons, indicator lights and alert tones
Handset alert tones
1 short beep X A key is pressed.
2 short beeps X Error tone. The command has failed.
X You have reached the beginning or end of the list.
X You have reached the minimum or maximum listening
volume.
3 short high-pitched beeps Conrmation tone. The telephone has completed the
command successfully.
4 short beeps Low battery warning.