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Translates private IP addresses to public IP addresses allowing VoIP devices to communicate over the Internet.

Protocol used for signaling to establish, maintain, and terminate VoIP sessions.

An older protocol suite used for voice and video over IP.

Encodes voice signals into digital form for transmission and then decodes them on reception.

Connects internal phone lines within a business and also connects them to the public switched telephone network.

Defines the media parameters for a call, such as codecs and media types.

A method to allow an end device to discover its public IP address and port number as assigned by a NAT.

Temporarily stores incoming packets to compensate for varying packet arrival times.

Ensures that voice traffic is prioritized over other types of traffic to prevent packet loss and delay.

Used for sending user inputs, like dialing numbers or menu navigation, during a call.

A software-based phone that enables VoIP calling from computing devices.

Reduces the reflected sound in voice communication to improve call quality.

Protects and regulates IP communications flows in and out of a network.

Converts between traditional phone signals and VoIP signals, connecting PSTN and IP networks.