can detect the busy tone sent by PSTN Switch accurately, and avoide the hanging up
problem of FXO port.
Because of the multiple types of PSTN switch, so FXO is required to
be compatible to all kinds of busy tones. And VOIP GATEWAY32 has excellent compatibility
and Adaptability.
VOIP GATEWAY32 has 3 methods for busy tone detection:
1) Pre-set 13 countries tone formats for user to choose;
2) If the tone is not in 13 countries, and user know the tone parameters, user can
define the tone according to 6.4.2 description;
3) If the tone is not in these 13 countries, and the user does not know the exact tone
parameters, user can operate the system into auto learning function according to
6.4.4. Get the parameters of busy tone from the line, then use what has learned to
do the detection.
6
6
.
.
4
4
.
.
3
3
.
.
1
1
T
T
o
o
n
n
e
e
s
s
d
d
e
e
t
t
e
e
c
c
t
t
i
i
o
o
n
n
o
o
f
f
d
d
e
e
s
s
i
i
g
g
n
n
a
a
t
t
e
e
d
d
c
c
o
o
u
u
n
n
t
t
r
r
i
i
e
e
s
s
In “Call Progress Tone Detecting Configuration” ---> “Country or district”, the default is
“China”, the range includes:
China
Taiwan
Japan
Korea
USA
Germany
India
Russia
France
England
Italy
Spain
Brazil
Detection parameters include:
Detect Type
Noice Control
Cadence Cycles
Detect Delay Time
）
（
Drop Delay Time
）
