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Trunk Settings
ISDN Settings
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ISDN ID: ISDN trunk ID.
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ISDN Type: Choice correct type and cable used.
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ISDN Role/Clock: Choice correct type.
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Overlapping DTMF: A incoming call from ISDN trunk, allow user to press the VoIP UA’s number.
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Overlapping Receive DTMF: Make a outgoing call to ISDN trunk, allow user to press the PSTN
callee’s number.
Hang up Detection
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Silence Detection Threshold: The volume below the threshold is used as a standard to determine
whether or not to hang up the phone.
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Silence Detection Interval: If the detected volume is below the threshold and the time exceeds the
silence detection interval, the system will hang up the phone automatically to avoid keeping the line
engaged.
NOTE: If unexpected call drops observed, turn off this option and consult your phone service
provider to confirm usage of Polarity Reversal. This problem usually happens when your phone
service provider use Polarity Reversal for other purpose instead of dropping a call.
Summary of Contents for voicecom
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