Signaling, Tones, and Transmission
Brazil
Tone Plan
Tone
Frequency
(Hz)
Cadence (s)
ARS 2nd Dial 425 Continuous
Busy 425 0.25 on, 0.25 off, repeat
Camp-on 425 0.06 on, 0.025 off, repeat x 2
Conference 440 1 on, off
Confirmation 425 Continuous
Dial Tone 425 0.975 on, 0.06 off, then repeat
Feature Active Dial 425 (0.125 on, 0.125 off) x 8, then continuous
Interrupted Dial 425 (0.1 on, 0.1 off) x 8, then continuous
Message Notification 425/440 425 (0.2 on, 0.2 off) x 4, then 440 (0.2 on, 0.2 off) x 2, then 425 (0.1 on, 0.1 off) x
4, then continuous
Modem Answer 2025 0.95 on, 0.05 off, repeat
Override 440 0.8 on, off
Paging 440 0.2 on, off
Reorder 425 0.25 on, 0.25 off, 0.75 on, 0.25 off, repeat
Ringback 424 1 on, 4 off, repeat
Special Busy 425 0.5 on, 0.5 off, repeat
Special Ringback 425 0.5 on, 0.5 off, 0.5 on, 2.5 off, repeat
Transfer Dial 425 (0.1 on, 0.1 off) x 3, then continuous
Voice Mail 440 0.6 on, off
Tone
Output Level (in dBm)
iONS
abONS
ONS iOPS OPS
iACO
abACO
abACOhl
iACOs
abACOs
ACO ACOs DCO ATT
ARS 2nd Dial -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Busy -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Dial -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Camp-on -17 -17 --- -14 -14 -14 -14 -14 -14 -14
Conference -19 -19 --- -16 -16 -16 -16 -16 -16 -16
Confirmation -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Feature Active Dial -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Interrupted Dial -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Message Notification -17 -17 --- -14 -14 -14 -14 -14 -14 -14
Modem Answer -20 -20 --- -17 -17 -17 -17 -17 -17 -17
Override -17 -17 --- -14 -14 -14 -14 -14 -14 -14
Paging -17 -17 --- -14 -14 -14 -14 -14 -14 -14
Reorder -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Ringback -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Special Busy -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Special Ringback -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Transfer Dial -23 -23 --- -20 -20 -20 -20 -20 -20 -20
Voice Mail -17 -17 --- -14 -14 -14 -14 -14 -14 -14