Signaling, Tones, and Transmission
Portugal
Tone Plan
Tone
Frequency
(Hz)
Cadence (s)
ARS 2nd Dial 400 Continuous
Busy 425 0.2 on, 0.2 off, repeat
Camp-on 425 0.2 on, 0.01 off, 0.2 on, 0.1 off
Conference 425 0.2 on, off
Confirmation 425 0.1 on, 0.1 off, 0.1 on, 0.7 off, repeat
Dial 350/425 Continuous
Feature Active Dial 350/425 0.7 on, 0.7 off, repeat
Interrupted Dial 425 0.9 on, 0.1 off, then (0.1 on, 0.1 off, 0.1 on, 0.7 off, repeat forever)
Message Notification 425 0.7 on, 0.07 off
Modem Answer 2025 0.95 on, 0.05 off, repeat
Override 425 0.2 on, off
Paging 425 0.2 on, off
Reorder 425 0.2 on, 0.2 off, repeat
Ringback 425 1 on, 4 off, repeat
Special Busy 425 0.2 on, 0.2 off, repeat
Special Ringback 425 1 on, 4 off, repeat
Transfer Dial 350/425 Continuous
Voice Mail 440 0.6 on, off
Tone
Output Level (in dBm)
iONS
abONS
ONS iOPS OPS
iACO
abACO
abACOhl
iACOs ACO ACOs DCO ATT
ARS 2nd Dial -17 -17 --- --- -12 -15 -12 -12 -10 -14
Busy -17 -17 --- --- -12 -15 -12 -12 -10 -14
Dial -17 -17 --- --- -12 -15 -12 -12 -10 -14
Camp-on -17 -17 --- --- -12 -15 -12 -12 -10 -14
Conference -17 -17 --- --- -12 -15 -12 -12 -10 -14
Confirmation -17 -17 --- --- -12 -15 -12 -12 -10 -14
Feature Active Dial -17 -17 --- --- -12 -15 -12 -12 -10 -14
Interrupted Dial -17 -17 --- --- -12 -15 -12 -12 -10 -14
Message Notification -17 -17 --- --- -12 -15 -12 -12 -10 -14
Modem Answer -24 -24 --- --- -19 -22 -19 -19 -17 -21
Override -27 -27 --- --- -22 -25 -22 -22 -20 -24
Paging -20 -20 --- --- -15 -18 -15 -15 -13 -17
Reorder -17 -17 --- --- -12 -15 -12 -12 -10 -14
Ringback -17 -17 --- --- -12 -15 -12 -12 -10 -14
Special Busy -17 -17 --- --- -12 -15 -12 -12 -10 -14
Special Ringback -17 -17 --- --- -12 -15 -12 -12 -10 -14
Transfer Dial -17 -17 --- --- -12 -15 -12 -12 -10 -14
Voice Mail -21 -21 --- --- -16 -19 -16 -16 -14 -18
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