N824 User Manual
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detection. When the "ring duration" or the "ring interval
duration" detected on N824 is larger than the standard
parameters or custom parameters, the call is detected
as ANSWERED.
*Standard parameters:
when you configure the "Tone Zone
Settings"
under
PBX→Basic
Settings→General
Preferences
you can get the country's standard tone
parameters.
Custom Ring Tone
Enable or disable Custom Ring Tone. If the custom ring tone
is enabled, you need to configure the following settings
according to the ringback signal.
Max Ring Duration
Max duration of the ring tone.
Max Ring Interval
Duration
Max pause between the two ring tones.
Min Ring Detection
Enable Min Ring Detection, which is useful for complex
situations, like when jitter or noise occurs on the PSTN line.
Generally it is disabled.
Min Ring Duration
Min duration of the received tone.
Min Ring Interval
Duration
Min pause between the two received tones.
4) Caller ID Settings
Caller ID Settings will help the system to detect Caller ID. If an incoming PSTN call
does not display Caller ID, you need to confirm with your service provider if the
line has enabled Caller ID feature. If this line does support Caller ID, configure
these settings to solve this problem.
Table 7-4 CO Line-Caller ID Settings
Caller ID Settings
Caller ID Detection
Enable/Disable the Caller ID detection.
Caller ID Start
This option allows you to define the start of a Caller ID
signal.
Ring: start when a ring is received (Caller ID Signaling:
Bell_USA, DTMF).
Polarity: start when a polarity reversal is started (Caller
ID Signaling: V23_UK, V23_JP, DTMF).
Before Ring: start before a ring is received (Caller ID
Signaling: DTMF).
Caller ID Signaling
This option defines the type of Caller ID signaling to use. It
can be set to one of the following:
Bell: bell202 as used in the United States
v23_UK: suitable in the UK
v23_Japan: suitable in Japan
