In our last VoIP installment, we looked at the main reasons why SIP has become a widely adopted protocol, but we left details of the protocol’s inner workings fairly vague. This article will drill ...

In this chapter, we start putting into practice some of the SIP concepts learned so far. We will show some very simple programming examples that illustrate how SIP works. As was stated in previous ...

Session Initiation Protocol is used widely for the setup, teardown and management of VoIP calls. Much of its functionality is related to the setup of calls, as its name implies. Part of this setup ...

The session initiation protocol (SIP) is one of the most popular signaling protocols used in applications that require a session setup and parameter negotiation before actual communication, as well as ...

This excerpt is from CCIE Voice Exam Quick Reference Sheets (Digital Short Cut), by Mark Lewis and published by Cisco Press. ISBN-10: 1-58705-333-0 Read Mark Lewis’ blog for Cisco Subnet here. More ...

In Part 1 of our SIP primer, I covered the SIP foundation layers starting from the message structure and ending with the SIP transactions. We saw how phone registrations and proxies could work using ...