Name	Description (What it does)	Properties (How you interact with it)
MAC	The MAC address of a physical phone.	Every device must have a unique, properly formatted MAC address.
Main Extension	The device's assigned phone line. A device must have an extension to make or receive calls.	Extensions can be created on the [Extensions](#bkmrk-extensions) screen. Two devices cannot have the same extension.
Main CallerID	Internal CallerID. This is seen only by phones on the same network.	Auto-filled based on assigned extension. Can be configured on the Extensions screen.
Main PhoneGroup Name	The PhoneGroup of the selected extension. Extensions in the same PhoneGroup will have some shared properties.	Auto-filled based on extension. PhoneGroup can created on the [Phone Groups](#bkmrk-phone-groups) screen and assigned on the Extensions screen.
Phone Name	A name assigned to the phone.	An optional field used only for bookkeeping.
Phone Type	The manufacturer of the phone.	Must be POLYCOM or YEALINK.

**Name**

**Description (What it does)**

**Properties (How you interact with it)**

MAC

The MAC address of a physical phone.

Every device must have a unique, properly formatted MAC address.

Main Extension

The device's assigned phone line. A device must have an extension to make or receive calls.

Extensions can be created on the [**Extensions**](#bkmrk-extensions) screen. Two devices cannot have the same extension.

Main CallerID

Internal CallerID. This is seen only by phones on the same network.

Auto-filled based on assigned extension. Can be configured on the **Extensions** screen.

Main PhoneGroup Name

The PhoneGroup of the selected extension. Extensions in the same PhoneGroup will have some shared properties.

Auto-filled based on extension. PhoneGroup can created on the **[Phone Groups](#bkmrk-phone-groups)** screen and assigned on the **Extensions** screen.

Phone Name

A name assigned to the phone.

An optional field used only for bookkeeping.

Phone Type

The manufacturer of the phone.

Must be POLYCOM or YEALINK.

Name	Description	Properties
Phone Model	The model number of the phone.	An optional field used only for bookkeeping.
NTP Server	The address of the time server used to update this device's clock.	Optional. If blank, a default NTP server will be used. Typically only necessary for off-site phones.
Secure Provision	Determines whether this phone encrypts its provisioning information. Turning this on requires additional setup.	Off by default. Typically only necessary for phones using off-site or publicly accessible networks.