Adjustable Ringer Volume: Adjusts the volume of the ringer.

Anonymous Call Rejection: Rejects incoming calls from callers who deliberately block their caller ID.

Blind Transfer: Routes a call to another party without speaking to them first.

Bluetooth: Allows the phone to share files with other bluetooth enabled devices or pair with a bluetooth headset.

Busy Lamp Field (BLF): Allows you to visually monitor activity of other extensions on your system. Lamp files light up on the phone when a contact is on an active call.

Call Forward All: Forwards all inbound calls to an internal extension or external number.

Call Forward Busy: Forwards inbound calls that arrive when you’re already in a call to an internal extension or external number.Note: Some models require Call Waiting to be disabled to enable Call Forward Busy. 

Call Forward No Answer: Forwards all unanswered calls after a specified amount of time to an internal extension or external number.

Call Forward Ring (softkey): Displays the option (softkey) to forward an incoming call to an internal extension or external number.

Call Logs: Records call details for inbound, outbound, and missed calls — including dates, times, duration, and caller ID information.

Call Waiting: Allows you to answer an incoming call while on another active call.

Caller ID (CID): Displays the internal extension or external number of incoming calls made to your line.

Cisco Multicast: Bandwidth-conserving technology that reduces traffic by simultaneously delivering a single stream of information to thousands of recipients.

Dedicated Line Keys: Designated lines within the device firmware.

Display Type: The type of display used on the phone — color, black & white, or touch screen.

Do Not Disturb: Stops your phone from ringing and sends all incoming calls directly to voicemail. Depending on your phone, calls may or may not be recorded in call history.

Electronic Hook Switch: Allows you to answer your phone when you are using a headset.

Gigabit Ethernet: Increases the speed of a local network, providing advanced voice and data communications features.

Hold: Places an active call on hold until the call is resumed at a later time.

Intercom (*ext): One or two-way communication through the speakerphone on a phone. This is initiated by dialing a before a line extension or ring group extension.

LDAP Directory: On-handset directory that allows callers to search for a given user by name and then dial that user directly. The corporate directory provides searchable contact matching by integrating with your existing LDAP (Lightweight Directory Access Protocol) directory, or with external catalogs like Active Directory.

Lower Multifunction Keys as Line Keys: Multifunction keys that support line assignments.

Message Waiting Indicator (MWI): Notifies you of new or unheard voicemail messages. This feature is available as a lamp on your phone, a special tone, or as an icon on an online user portal.

Multi-Way Calling: Allows a caller to add a second outbound call an active call, creating a 3-way call.

Multicast “Mega” Volume (Yealink only): Increases the volume level of pages (latest firmware update required).

Mute Button: Mutes your microphone locally during an active call.

On-Device Directory: A local or personal directory separate from the corporate directory that is maintained on the phone, usually as pre-programmed numbers on your speed dial.

On Device Ethernet (PoE): Allows your network cables, like ethernet cables, to carry both data and electricity to the phone (also known as Power over Ethernet).

On-Device Call Recording: Allows calls to be recorded to a USB flash drive inserted in the phone. A softkey displays giving the option to record active calls (audio component only).

On-Device Speed Dial Edit: Allows you to manually manage contacts assigned to speed dial keys on your phone.

One Touch Activation: This plug-and-play feature allows a phone to provision and set up automatically, whether right out of the box or after a factory reset, without manually entering a provisioning URL.Note: This feature is only supported on Polycom and Yealink phones.

On-Hook Dialing: Allows you to dial an internal extension or external number without picking up the handset.

On-Screen Message Display: Displays new voicemail notifications on the screen.

PC Connection: Shares the network with another network device such as a personal computer.

Physical Line Keys: Physical keys solely dedicated to line extension types.

Physical Lower Multifunction Keys: Physical keys dedicated to functions programmed by the manufacturer.

Physical Upper Multifunction Keys: Physical keys dedicated to functions programmed by the manufacturer.

Polycom Multicast: Multicast paging plays the announcement over the Polycom phone’s built-in speakerphone.  When a page is received, the phone automatically plays the announcement while the phone is idle. Depending on the page group, the announcement can be setup to place active calls on hold — this ability to page during an active call is enabled by default, and can be disabled by the user or globally upon request.

Polycom Acoustic Fence: Advanced noise cancellation feature on Polycom VVX series phones that automatically filters background noise for your callers—making it easier for them to hear you. This is a one-way feature, only the audio your callers hear is affected; what you hear from them will remain unchanged.Note: Firmware version 5.4.4 or higher is required.

Redial: Dials the last number called.

Reject: Sends an incoming call directly to the voicemail setup for your line.

Remote Phonebook/Directory: Enables Remote Directory and automatically fills it with all of the lines on the PBX. Not all devices support this feature.

Resync: Remotely reboots the device from the admin portal and applies any changes saved within the device profile.

Ring Tone Permanence: Allows for customizable ring tone settings (i.e. custom ring tone for each contact).

Shared Line Appearance (SLA): Allows multiple phones to share a single extension and easily move calls between those phones.

Sidecar: Sidecars expand the number of line buttons available for use with a physical phone and can be used to leverage additional lines, shared lines and/or speed dials on a supported phone.

SIP Accounts: Line extensions assigned to your device.Note: Some devices support additional SIP Accounts than the allotted line keys.

Softkey Park and Group Answer: Allows you to park (temporarily store) a call and then retrieve the call on another phone.

Speakerphone: Transits call audio through the phone’s speakers, allowing for hands-free communication.

Stutter Tone: Plays an audible tone with the dial tone to notify you of new voicemail messages.

Time/Date Display: Displays the time and date on the screen (the time zone is defined from the admin portal).

Upper Multifunction Keys: Multifunction keys that are programmed through the Web Interface of a device. Supported functions vary by manufacturer (i.e. *99 for voicemail access, DND, speed dial, etc.).

Upper Multifunction Keys as Line Keys: Multifunction keys that support line assignments.

Video: Allows you to make video calls with a video endpoint (not all endpoints are supported).

Virtual Dedicated Line Keys: Keys solely dedicated to line extension types.

Virtual Upper Multifunction Keys: Multifunction keys that are programmed through the Web Interface of a device. Supported functions vary by manufacturer (i.e. *99 for voicemail access, DND, speed dial, etc.).

Voicemail Button: Allows you to access your voicemail at the press of a button.

Warm Transfer: Places a current call on hold and allows you to speak with the other party before transferring the call to them.

Web Interface Provisionable: Allows for provisioning and customization settings can be accessed via a web user interface.

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