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Call Screen
Call Screen allows you to block incoming or block outgoing calls from international number.
Reject Incoming Phone Number：. Create and maintain a list of numbers to be screened.
Incoming calls from the "screened callers" list will be blocked.
Reject Outgoing Phone Number：. Create and maintain a list of numbers to be screened.
Reject Outgoing Phone number from local user dial number.
QoS Setting
The QoS (Quality of Service) is to guarantee that the Voice and Data should be transmitting at the
same time and Data couldn't influence the Voice quality. When ToS bits is enabled, it will guarantee the
Voice have the first priority pass through the ToS enable devices.
SIP ToS/Diffserv：Set to value
RTP ToS/Diffserv：Set to value
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