Siemens Optiset E Entry Quick Reference Manual page 13

Table 3. Tones
Sound
Busy tone
Dial tone
Fast busy tone
Short tone every 20
secs.
3 short tones (confir-
mation tone)
3 short tones followed
by dial tone
2 short tones every 20
secs.
Wavering (error) tone
Meaning
The party you called is
on the phone.
You can make a call or
invoke a feature.
Invalid call
Internal call waiting
A feature has been suc-
cessfully activated.
Additional input, such
as a PIN, is required.
External call waiting
Invalid feature request
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