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Specifications
Release 3.3 19
United Kingdom
Tone Plans
Tone plans permit the station user to distinguish different stages of call progress and different
types of calls. Each tone is assigned a level which ensures an acceptable quality.
Australia
Tone Plan
Loss Plan Matrix
iONS
↑
ONS
↑
iOPS
↑
OPS
↑
DGS
↑
WAN
↑
DCO
↑
iACO
↑
iACOs
↑
ACO
↑
ACOs
↑
ATT
↑
iONS
→
11 11 11 11 5 5 5 3 6 3 6 6
ONS
→
11 11 11 11 5 5 5 3 6 3 6 6
iOPS
→
8 6 6 6 0 2 2 0 1 0 1 2
OPS
→
8 6 6 6 0 2 1 0 1 0 1 2
DGS
→
7 4 7 7 0 0 0 1 -2 -3 -2 0
WAN
→
7 7 7 7 0 0 0 1 4 4 4 4
DCO
→
7 7 7 7 0 0 0 1 1 4 1 4
iACO
→
3 3 1 1 -4 -4 -2 0 1 1 1 2
iACOs
→
2 2 1 1 1 0 -3 3 1 1 1 4
ACO
→
0 -2 1 1 -1 -3 -2 0 1 1 1 4
ACOs
→
2 2 1 1 1 0 -3 3 1 1 1 4
ATT
→
2 2 2 2 -2 -2 1 0 4 4 4 4
Tone
Frequency
(Hz)
Cadence (s)
ARS 2nd Dial 400/425 Continuous
Busy 425 0.375 on, 0.375 off, repeat
Camp-on 425 0.25 on, off
Conference 425 0.8 on, off
Confirmation 400/425 0.1 on, 0.1 off, 0.1 on, 0.7 off, repeat
Dial Tone 400/425 Continuous
Feature Active Dial 400/425 (0.95 on, 0.05 off) x 2, then (0.1 on, 0.1 off, 0.1 on, 0.7 off, repeat forever)
Interrupted Dial 400/425 (0.95 on, 0.05 off) x 2, then (0.1 on, 0.1 off, 0.1 on, 0.7 off, repeat forever)
Message Notification 400/425 (0.95 on, 0.05 off) x 2, then (0.1 on, 0.1 off, 0.1 on, 0.7 off, repeat forever)
Modem Answer 2025 0.95 on, 0.05 off, repeat
Override 1400 0.2 on, off
Paging 425 0.25 on, off
Reorder 425 2.5 on, 0.5 off, repeat
Ringback 400/450 0.4 on, 0.2 off, 0.4 on, 2 off, repeat
Special Busy 425 0.375 on, 0.375 off, repeat
Special Ringback 400/450 1.0 on, 2.0 off, repeat
Transfer Dial 400/425 (0.1 on, 0.1 off) x 3, then continuous
Voice Mail 440 0.6 on, off