call progress tones: Belgium

Table 1. Tone parameter values (Belgium).
This table describes the characteristics of Belgian call progress tones. For each different tone name (Dial Tone, Ring Tone, and Busy Tone) the minimum, nominal, and maximum frequency in Hertz is listed, followed by the minimum and maximum power ratios in decibels. Continuous tones are identified, and for discontinuous tones, details of the minimum, nominal, and maximum durations in milliseconds that the tone is on and off are listed.
Tone Name	Tone Label	Tone Type	n	Frequency n (Hz)			Level n (dBm)		Time On n (ms)			Time Off n (ms)
Tone Name	Tone Label	Tone Type	n	Min	Nom	Max	Min	Max	Min	Nom	Max	Min	Nom	Max
Dial Tone	Dial	Dial	1	410	450	491	-30	-9	Continuous tone
International Dial Tone ¹	Dial 2, International	Dial	1	800	900	1250	-30	-9	300	388	460	—
			2	800	1020	1250	-30	-9	300	388	360	—
			3	800	1140	1250	-30	-9	300	388	460	—
Ring Tone	Ring	Ring	1	410	450	491	-40	-9	820	1000	1160	2520	3000	3460
Busy	Busy	Busy	1	410	450	491	-40	-9	100	150	180	100	150	180
International dial tone is a Special Information Tone (SIT) and consists of a sequence of three frequencies with no off-time between them.

Call progress tones: Belgium