Phone Virtual (5.X)
For later versions of Switchvox,  see SETUP-EXTENSIONS-Manage-Create-Extension-Type-PhoneVirtual-6-X or SETUP-EXTENSIONS-SETTINGS-Manage-Phone-and-Virtual-Extensions-6-6.
Phone and Virtual Extensions
The settings are mostly the same for SIP phones, Analog phones, and Virtual extensions. These extensions have a corresponding Extension Suite account (/main):
SIP Phone or SIP Adapter for Analog Phone (ATA). A SIP phone, or an analog phone plugged into a SIP Adapter (e.g., Sipura SPA-1001).
Analog Phone. A regular phone (not VoIP/SIP) that is physically plugged into the Switchvox server. This is an appropriate extension-type for a fax machine or an intercom.
NOTE: We strongly recommend you do not use this option for your phone extensions. Use instead analog telephone adapters, or a channel bank. If you choose to use Analog Phone extensions with phones physically plugged into Switchvox, those phones will not be able to take full advantage of the Switchvox features.
Virtual Extension. An extension without a phone or a Switchboard. This type of extension behaves like a SIP Phone extension except it does not have a Switchboard and it does not show the phone as Unreachable in System Status. This is useful as a general voicemail box.
See also these articles: