SIP Learning

SIP  SIP - Session Initiation Protocol Signaling Protocol Controls Multi-media sessions Est...

User Agents A SIP (Session Initiation Protocol) user agent is a software application that runs o...

SIP Addressing In SIP (Session Initiation Protocol), addressing is used to identify the endpoint...

SIP Servers Registration Re-Registration SIP Proxy Servers  SIP Server - Proxy mode SIP Se...

SIP Clients SIP clients are software applications that run on devices such as computers, smartph...

SIP messages are the communication units used by SIP endpoints to establish, modify, and terminat...

SIP request methods are used to initiate a request from a client to a server or from one server...

SIP response codes are made up of 3 digits, first digit in the code indicates the class of the re...

A sip message looks like an HTTP message here is an example of a SIP header.   INVITE sip:user...

SIP SDP SIP SDP stands for Session Description Protocol and is a protocol used to describe multi...

In SIP SDP, the session parameters can be changed during the lifetime of a session by sending a...

SIP Mobility SIP Call Forking - Parallel SIP Call Forking - Sequential Call Forward - No A...

Proxies and SIP routing Stateless proxy: forgets about the SIP request once it has been forwar...

Mime was defined to provide a way of attaching different document/file types to email messages, S...

Basic SIP to PSTN example SIP Messages used in SIP to PSTN call Other SIP to PSTN Codes SIP ...

Back-2-Back Thee B2BUA its a standalone proxy when it receives a request process the request...

Authentication Authorization Encryption Attacks and Responses Ethical Hacking   Authent...

Firewalls NAT & Types of NAT Firewall / NAT solutions THE RTP Problem MG, ALG, SBC   Is...

add opensips-cli curl https://apt.opensips.org/opensips-org.gpg -o /usr/share/keyrings/opensips-...