SIP registration (SIP method: REGISTER) allows the UCM to onboard and store the network location of a SIP User-Agent or IP endpoint.
The 180 “ringing” code is used to alert the IP phone to generate a local ring-back tone - that is, playing the ring back on the handset locally.Īll SIP distributions are subject to signalling processes also known as SIP methods:
The invite will then be sent through to the telephony switch network, where it will reach the IP phone and send a 100 “trying” code and a 180 “ringing” code. Once authentication has been successful, the SIP server will respond with a 100 “Trying” code, which indicates that a request has been received and the server is working on processing an invitation. Registering an IP phone for first-time use is easy – the IP phone will communicate with the server through a series of messages and codes to authenticate the session. SIP supports a wide range of highly efficient codecs, allowing for up to 4000 simultaneous calls on a single gigabit connection and runs over TLS - providing users with peace of mind in knowing that their personal information and communications are safely secured. SIP concurrently signals and controls multimedia communication sessions, including voice, video and instant messaging. This signalling protocol is used for initiation, maintenance and termination of real-time sessions which comprise voice, video and messaging applications. In the advanced world of VoIP, Session Initiation Protocol (SIP) is a call setup protocol that operates at the application layer. What is Session Initiation Protocol (SIP)?
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