Your Teracom newsletter for April
In this issue:
Course 133 Fundamentals of VoIP & IP Telecom Networks
3-day course for non-engineers explaining Voice over IP and the network it runs on... in plain English.
We're always listening to our customers to best meet your needs. Recently, we've had wide interest in a course to get people up to speed on VoIP and "the network", from telecom people who need to understand the new-generation IP telecom network and VoIP, from datacom people who need to understand voice on LANs and WANs, and people now working with VoIP phone systems.
In response: VoIP Course 133 Fundamentals of VoIP & IP Telecom Networks, getting non-engineers the core set of knowledge that everyone serious involved with VoIP and IP telecom needs to know.
Understand telecom and network jargon, buzzwords, technologies, and most importantly, the underlying ideas... and how it all fits together. Eliminate buzzword frustration. Increase confidence, accuracy and efficiency.
With numerous case studies and class exercises, you will learn how a VoIP call is set up and carried end-to-end, how an organization saves money moving to softswitches and SIP trunking, project management, best practices and more.
Get a solid knowledge base to build on… structured, complete knowledge you can't get on the job, reading articles or talking to vendors.
Eliminate buzzword frustration, and gain the knowledge to be confident!
This is career-enhancing knowledge that lasts a lifetime, and training that will be repaid many times over in increased accuracy and productivity.
Top-ranked instructor, three days in the classroom, 300‑page course book with detailed notes, bonus CVA Online Courses, TCO CVA Certification. $1495.
To get off to a good start, we're offering earlybird specials, including a Telecom 101 textbook shipped to you, free!
Denver, DC, Santa Clara, Atlanta, Chicago, San Jose, New Orleans
Tutorial - VoIP: The Big Picture
This tutorial is a lesson taken from Course 101, Chapter 1 "Fundamentals of Telephony". It is also used in Course 130 Voice over IP, SIP, Security, 5G and IoT, in Course 133 Fundamentals of VoIP & IP Telecom Networks, and in Online Course 2221, Fundamentals of Voice over IP, the first course in the Certified VoIP Analyst (CVA) certification package.
We begin understanding VoIP with a top-level view of the major components of a VoIP system. These components may be located at the customer premise, at a carrier, at a third party, or any combination thereof.
Discussion of VoIP system components necessarily involves discussion of IP and other related protocols, which are covered later in the course. Some of the protocols are introduced in this lesson, and explained in detail in subsequent lessons.
Beginning at the right side of the diagram, a VoIP system includes the following basic elements:
Terminals, including both dedicated-purpose IP telephones as well as soft phones, which are software applications running on general-purpose computers using Windows, Android and other operating systems.
A VoIP terminal has a keypad, a speaker and microphone, a codec to convert between analog and digital, and a protocol stack to handle the stream of digitized speech in typically 20 ms segments with timing variation correction, sequencing and error control.
Since it is a Voice over IP system, the terminal must also necessarily have an IP protocol stack for communication of the segments of digitized speech in IP packets, the DHCP protocol to obtain an IP address, a LAN interface and MAC address and physical wired or wireless connection to the network.
The terminal may optionally have many other features, functions and protocols such as a display screen and Internet browser incorporated.
Another type of terminal is a voicemail system, which may be called an Integrated Messaging System if it handles multiple different types of messages like voice, email, short text messages, fax, and supports functions like voice-to-text and text-to-voice.
Another component of a VoIP system is the physical connections, implemented with LAN infrastructure, consisting of LAN cabling or wireless LANs, and LAN switches.
The softswitch, also called a SIP server, SIP proxy or call manager, is an important component of a VoIP system. Its main function is to assist in call setup. The softswitch also manages terminals, regulates admission to the VoIP system and provides terminal authentication, registration, status and address resolution as well as call control.
The router connects LAN segments, properly called broadcast domains, to each other within the building, and to external connections, including to a gateway to get to the circuit-switched PSTN, and direct to the Internet, VPN services and SIP trunking services that move VoIP packets natively long distance.
Gateways are devices that perform format conversions between the Voice over IP world, which uses IP packets and SIP call setup messages, and the circuit-switched public telephone network, which uses DS0 channels and ISDN call setup messages. Both coding and signaling conversions are required.
A firewall system is required to manage connections to other IP networks. This includes The Internet, which allows any communications to anywhere but with no guarantees, Virtual Private Networks (VPNs), which allow any communications to specific locations (e.g. other locations of an organization), and may include performance guarantees, and SIP trunking, which carries VoIP to specific locations in native format, with performance guarantees suitable for telephone calls, and may include gateway service to convert VoIP to traditional telephony for calls terminating on the PSTN.
Benefit from these offers by registering and paying early:
Register early: offers will be withdrawn without notice. Terms and conditions
CVA Certification Package Included with VoIP Course 133
Six online courses allow you to refresh your knowledge anytime. Write the optional certification exam to get your TCO CVA Certification to prove it!
The CVA Certification Package unlimited plan is included with VoIP Course 133. You get six online preparation courses plus the CVA certification exam, both with unlimited repeats and no time limits, included free with Course 133 Fundamentals of VoIP & IP Telecom Networks.
We are blown away by the awesome reviews: 4.9 stars from 50 reviews! Thank you so much to everyone who contributed! We are tickled pink you found Teracom training so useful!
Volker B ★★★★★
I feel the courses are also priced fairly and are fun to watch and study.
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