Yeastar Technology S20, Extension User Manual

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S-Series Extension User Guide
7

DND: Do not Disturb. When DND is enabled for the extension, the extension will be
unavailable.

Call Waiting : check the option if the extension should have Call Waiting capability. If the
option is checked, the
“When Busy” call forwarding options will be unavailable.
1.2.2 Blacklist/Whitelist
Blacklist is used to block an incoming/outgoing call. If the number of incoming or outgoing call is
listed
in the number blacklist, the caller will hear the following prompt: “The number you have dialed
is not in service. Please check the number and try again”. The system will then disconnect the call.
Whitelist is used to allow incoming/outgoing numbers.
The system supports to block or allow 3 types of numbers:

Inbound : the number would be disallowed or allowed to call in the system.

Outbound : users are disallowed or allowed to call the number out from the system.

Both : both inbound and outbound calls are disallowed or allowed.
1) Add Blacklist/Whitelist
Select Blacklist or Whitelist tag, click to add a number to Blacklist or Whitelist.

Name : give a name for the blacklist/whitelist.

Number : enter the numbers, one number per row.

Type : choose the type.