Ericsson Premium User Manual page 55

Internal ringing signal
External ringing signal
Automatic call-back signal
BusinessPhone – Premium Telephone
Signals
Ringing signals are emitted from the phone.
- repeated after 4 s
- repeated after 4 s
Note: The tones and ringing signals in this guide refer to the
standard system but may vary between countries.
Tones and Signals
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