Voice over Internet Protocol encapsulates digitized audio into IP packets rather than routing it over dedicated copper circuits. It relies on a signaling protocol to establish the connection and a media protocol to stream the audio in real time. Because it shares infrastructure with standard data traffic, VoIP requires strict network prioritization to prevent dropped packets from garbling the speech.
We need to update the firewall rules because the new VoIP phones are failing to register with the cloud server.
When troubleshooting a VoIP issue, always check for one-way audio. It usually points to a NAT traversal problem or a blocked firewall port, not a faulty handset.
Also heard as
- Voice over Internet Protocol
Related terms
Voice over IP
A technology that delivers voice communications and multimedia sessions over Internet Protocol networks.
QoS
A set of network mechanisms used to prioritize specific types of traffic over others.
Jitter
The variation in the delay of received packets or the deviation of a digital signal from its precise timing.
PSTN
The global infrastructure of circuit-switched telephone networks operated by national and regional carriers.