Chapter 7. Specifications
Section 300-Installation
7-16 DBS Manual - Revised April 2000 DBS-2.3/9.2-300
Tone Characteristics
Table 7-17. Tone Plan
Tone Name Frequency Timing (seconds)
CO Call Tones
CO incoming call 550/400 Hz at 16 Hz Programmable
Hold recall 550/400 Hz at 16 Hz 0.5 on/3.5 off
Transfer recall 550/400 Hz at 16 Hz 0.5 on/3.5 off
Trunk queuing 550/400 Hz at 16 Hz 0.5 on/0.5 off/0.5 on/2.5 off
CO offhook 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 on/0.5 off
Busy override 400 Hz 0.25 on/0.25 off/0.25 on
Splash 550 Hz 0.5 on
Error 400 Hz 0.5 on/0.5 off
Reminder call 550 Hz 4 on/1 off/4 on/1 off/4on 1 off/4 on/silence
Call waiting 550 Hz 0.25 on/0.25 off/0.25 on/7.25 off
Key press 1 kHz Duration of the key press
Internal Tones (SLTs)
CO/Station ringing
Hold recall Callback
20 Hz 1 on/3 off
Transfer (Prior to
CPC-B 2.11)
20 Hz 0.5 on/3.5 off
Transfer (CPC-AII
and CPC-B 2.11 or
higher)
20 Hz Programmable
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