AT&T TL88102BK - Alert Tones and Lights; Handset Alert Tones; Telephone Base Alert Tones

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Appendix
Alert tones and lights
Handset alert tones
One short beep Tone of each key press, if key tone is turned on.
One long beep Indication to begin recording a message, memo or announcement.
Two short beeps
You are pressing qCID or pDIR on a cordless handset when the
volume is already at its highest or lowest setting.
-OR-
Call waiting tone.
-OR-
Error tone.
-OR-
Registration failure tone.
Confirmation tone
(three rising tones)
The system has completed the command successfully.
Four beeps The other party has ended your intercom call.
-OR-
The handset has gone out of range from the base during a call.
Four short beeps Low battery warning.
Telephone base alert tones
One short beep Tone of each key press, if key tone is turned on.
One long beep Indication to begin recording a message, memo or announcement.
Two short beeps
You are pressing q/VOLUME/p on the telephone base when the
volume is already at its highest or lowest setting.
-OR-
Call waiting tone.
-OR-
Error tone.
-OR-
Registration slots are full.
Confirmation tone
(three rising tones)
The system has completed the command successfully.
Four beeps The other party has ended your intercom call.