Chapter 7. Specifications
Section
Tone Characteristics
Table 7-17. Tone Plan
Tone Name
Frequency
Timing (seconds)
CO Call Tones
CO incoming call
Hz at 16 Hz
Programmable
Hold recall
Hz at 16 Hz
0.5
off
Transfer recall
Hz at 16 Hz
0.5
off
Trunk queuing
Hz at 16 Hz
0.5 on/O.5 off/O.5
off
CO
signal
550 Hz
1 on/7 off
Internal Tones (Key Phones)
Dial tone
400 Hz
Continuous
CO incoming call
550 Hz
1 on/3 off (Prior to CPC-B 3.1)
Programmable (CPC-AII and CPC-B 3.1 or
higher)
Callback
400 Hz
1 on/3 off
Busy
400 Hz
0.5
off
Busy override
400 Hz
0.25 on/O.25 off/O.25 on
Splash
550 Hz
0.5 on
Error
400 Hz
0.5 on/O.5 off
Reminder call
550 Hz
4 on/l off/4 on/l
1 off/4 on/silence
Call waiting
550 Hz
0.25 on/O.25 off/O.25
off
Key press
Duration of the key press
Internal Tones
CO/Station ringing
20 Hz
1 on/3 off
Hold recall Callback
Transfer (Prior to
20 Hz
0.5
off
CPC-B 2.11)
Transfer (CPC-AII
20 Hz
Programmable
and CPC-B 2.11 or
higher)
7-16
DES Manual issued
DBS-70-300
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