You can configure your IP phones and assign extensions to each phone. To do this you must provision your IP phones. Although your phones can be configured one by one manually via their web interface, this is not practical and will inevitably lead to errors and a significantly longer deployment time.
Moreover, their management in this way will be almost impossible. Supported IP phones can be automatically provisioned, allowing for easy deployment and management over time.
Table of contents
Excerpt from tutorial
VoIP is a Layer 3 network protocol that uses various Layer 2 point-to-point or link-layer protocols such as PPP, Frame Relay, or ATM for its transport. VoIP enables Cisco routers, access servers, and multiservice access concentrators to carry and send voice and fax traffic over an IP network.
In VoIP, digital signal processors (DSPs) segment the voice signal into frames and store them in voice packets.
These voice packets are transported via IP in compliance with a voice communications protocol or standard such as H.323, Media Gateway Control Protocol (MGCP), or Session Initiation Protocol (SIP).
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