ZyXEL Communications P-2302HWUDL-P1 Support Notes page 86

P2302HWUDL-P1 Support Notes
Default Extension Number
An extension number comprises of a group number and a sub number. If the group number is not enabled, the
extension number is simply the sub number. You can assign a group number to several phones and use this
number to call the group of phones. When you dial a group number, all of the phones with the same group
number would ring. The phone that picks up first gets the line, and the other phones stop ringing.
To configure this feature, you need to click VoIP > Phone > Ext. Table.
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