84  VoIP Subscriber Gateways 
 
 
To set the parameters of acoustic signals manually, use ‘Manual tone configuration’. You can set 
frequencies and signal cadences listed below: 
-  'Station reply' tone frequency, Hz 
-  'Station reply' tone cadences, ms 
-  'Busy' tone frequency, Hz 
-  'Station reply' tone cadences, ms 
-  'Ringback' tone frequency, Hz 
-  'Ringback' tone cadences, ms 
-  'Congestion' tone frequency, Hz 
-  'Congestion' tone cadences, ms 
 
Value limits: 
-  the range for frequencies: 0 – 4000 Hz; 
-  the range for time intervals: 0 – 65535 ms.