N824 User Manual
34
Busy Detection is used to detect far end hang-up or for
detecting a busy signal. Select ―Yes‖ to turn this feature on.
If Busy Detection is enabled, it is also possible to specify
how many busy tones to wait for before disconnecting the
call. The default is 4, but better results can be achieved if set
to 6 or even 8. Remember, the higher the number, the more
time will be required to release a channel. A higher setting
lowers the probability that you will encounter random
hang-ups.
The busy detection interval.
If Busy Detection is enabled, it is also possible to specify the
cadence of your busy signal. In many Countries, it is
500msec on, 500msec off. Without Busy Pattern specified,
N824 will accept any regular sound-silence pattern that
repeats <Busy Count> times as a busy signal. If you specify
Busy Pattern, then N824 will further check the length of the
tone and silence, which will further reduce the chance of a
false positive disconnection.
Used for Frequency Detection (Enable detecting the busy
signal frequency or not).
If the Frequency Detection is enabled, you must specify the
local frequency.
Hangup Polarity
Detection
The call will be considered as ―hang up‖ on a polarity
reversal.
Define the ring out value (in seconds) for this trunk.
3) Answer Detection
Answer Detection" will help the system to accurately bill your calls.
If the CO line could send polarity reversal signal after a call is established, you
could choose "Polarity Detection" in this field. If not, you could choose "Ring
Detection" and configure the rest of the settings accordingly.
Table 7-3 CO Line-Answer Detection
Select which type to detect the call as answered.
Default: N824 will start to charge once you grab the CO
line to call out, whether the call is answered or not.
Polarity Detection: if the CO line supports polarity, you
can choose "Polarity detection". When the callee
answers the call, the provider will send a polarity signal,
and then N824 starts to bill.
Ring Detection: if you choose this option, N824 will
charge the call according to CO line ring back tone
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