Introduction to Voice Over IP

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Info
Level: Beginner
Date Created: August 8, 2010
Length of Class: 60 Minutes
Tracks
Telephone Systems
Prerequisites
Introduction to Telephone Systems
Introduction to Convergence
Purpose of Class
This class discusses the basic components and requirements for a business or enterprise Voice Over IP telephone system.
Topics Covered
VoIP Servers
VoIP Clients
Gateways
Protocols
Codecs
Network Latency
QOS
Unified Communications
Class Notes
VoIP Servers
VoIP Servers route calls like a traditional PBX
There are proprietary and Open Source versions of VoIP Server software
VoIP Clients
VoIP "phones" are all client computers
Hard Phones are computers made to look like traditional phones
Soft Phones are software that is installed on a computer so that the computer can be used as a phone
Gateways connect VoIP networks to the PSTN (Public Switched Telephone Network)
Protocols
VoIP Systems use protocols for servers and clients to communicate
SIP is a standards based protocol that numerous vendors use
Codecs are used to encode voice communication
Codecs determine the Sound Quality and the Bandwidth usage of a call
Most VoIP servers come with codecs that you can use without any extra fees. If you need better codecs they can be purchased
Network Latency and QOS
Network latency is the time it takes for data to get from point A to point B
Standard telephones have a latency of 45ms, VoIP can have a latency of up to 75-100ms.
QOS -- Quality Of Service -- is a feature of networking equipment that allows the equipment to prioritize network traffic based on what it is.
Unified Communications is the idea that computer programs and server should be able to work with telephone communications.

Пікірлер: 926

@-andymel 6 жыл бұрын

01:47 *VOIP Servers* 02:08 Normal phone systems (PBX) and the difference to VOIP 13:40 *VOIP Clients* 22:31 *VOIP Gateways* 30:05 *VOIP Protocols* 30:55 SIP Session Initiated Protocol 36:19 *VOIP Codecs* (Sound Quality vs Bandwidth) 41:43 *Network latency and QoS* (Quality of Service) 49:13 *Unified Communications* 53:40 *Summary and Final Thoughts*

@brandonfarfan1978 5 жыл бұрын

Thanks dude!

@richardherndon9670 5 жыл бұрын

Thank you very much for the time index!

@fortnitebattleroyalenation190 5 жыл бұрын

Thank You so much

@albaraelsamani8658 4 жыл бұрын

👍

@RavenValkyrie 4 жыл бұрын

Thank you. Much appreciated.

@makhomomotsoane2873 4 жыл бұрын

here i am watching a 2010 video in 2020. Thank you for the lesson. I'm looking forward to watching more of your classes.

@josnardstorm 3 жыл бұрын

“Sears, JC Penny’s...” ...the most dated part of the video lol

@kuroXmiko 3 жыл бұрын

whatching it in 2021 this makes more sense then what then whats written in my assignment

@randomnick2890 3 жыл бұрын

Still perfectly useful information here in 2021

@thedapperpauper 2 жыл бұрын

2021 :) I've been wanting to comprehend this magic for a looooong time now. Got it. Good. Thank you.

@andrew121410 2 жыл бұрын

I’m watching in 2022

@ling6701 10 жыл бұрын

I don't see how one cannot understand with so repeated explanations, there is no better teacher than this guy I believe.

@ayushsaxena2529 8 жыл бұрын

Hi Eli, I am very thankful of your videos. Because of you I got a job in servers. I did not have even the basis idea about networking, servers, protocols, and how things work in business. but you made it so easy for me to understand all the things. I stated watching your worthy videos from last 6 months. I started from basic and keep moving forward. I acquire great knowledge from your videos. At the starting days of interviews, I got the rejection at that early time. But I did not give up and kept trying. Then Finally I got my desire job. the best thing about your videos is that you start from basic terms step bt step and correlate it with practical things which happens in business industries which makes it very simple to understand and it also create interest in learning. And then you take it to the advance level from intermediate from basic and then at the and of the video whatever you described that settle down in our mind. I really like your videos. And this is not the single quality what i found. If i talk about the way you describe, talk, communication with the viewer and a little bit humor as well. Thank you once again for sharing the videos on youtube and your videos did a great job for me.

@emarskineel 5 жыл бұрын

13sch seems legit

@Niche_skills 5 жыл бұрын

You must be a great learner Ayush. Over the 23 years of my own experience I can definitely confirm to you that yours is a rare breed of student. Keep your mind open and keep learning. A man stays in students phase throughout his life and has it's great pleasure in it.. connect with me on fb Sandeep if possible.. would like to have peoples like you in my friend circle. m.facebook.com/profile.php?id=100000476180981 don't forget to mention this thread. :-)

@wu1ming9shi 4 жыл бұрын

@@Niche_skills He didn't really say what the job is he's doing right now. If you work with windows servers gui it's probably gonna be a bit easier than doing everything with terminal or unix like systems (depends what you're used to anyway. Maybe Windows is harde to understand because you used Mac all your life?). But ofcourse basics like Ip's, Masking, DNS and DHCP (which technically isn't required in a network but it does makes things far more easier for you) and various security options are as good as being used everywhere. So yeah it's hard to say. If it is indeed what he's working with right now it wouldn't be so hard to imagine that you could land a job with it. Especially if you create your own roads, started with this type of videos. A good dose of passion is also necessary ofcourse or you'll stop learning and eventually fall behind.

@ayushsaxena2529 4 жыл бұрын

Recently I was working for Microsoft for Skype for Business and Microsoft Teams. These videos really changed a lot of things. 😊

@oumarmaiga1936 3 жыл бұрын

IS-IS : kzfaq.info/get/bejne/rLSFpqR7qLypfXU.html

@elainerodriguez6737 4 жыл бұрын

In all of my 4years working in the IT world, I have never met or heard anyone explain and break this down in such clear and kind manner. Thank you Eli. I'm so grateful I stumbled upon this today. I know I'm 9years too late but this still very much applies to the job i'm eyeing for now. Thank you so very much!!! God bless you.

@kalMHe Жыл бұрын

I can not believe how amazing you are teaching things ! Even people with zero experience like me could grasp the whole idea !

@hedhntress1 9 жыл бұрын

I'm extremely impressed with how articulate you are and your Ability to communicate complex language to a lay person. I now feel confident in speaking to VoIP companies with full comprehension. You're awesome :-) Thank You Eli

@schioncalzanzi7597 9 жыл бұрын

He is going waaaaaaaaay to slow as if I'm a 3rd grader OMG!!!!

@VladIlie 9 жыл бұрын

Cedric Littleton if you can withstand giggling, just put it at 1.5 speed :)

@schioncalzanzi7597 8 жыл бұрын

hahaha yes but it is good not complaining at all :)

@ajaykumardalkoti5370 6 жыл бұрын

Noelle King g

@TheSunOppositePluto 8 күн бұрын

Just got hired at a VoIP company and you are preparing me for my training. I will feel so much more confident on my first day now.

@sanjapetricmilosevic6709 10 жыл бұрын

After I watched this video all I can say Wow. I have never heard anyone to explain something complicate in so simple way. Thank you for sharing your knowledge with us

@patrickfichtner7438 5 жыл бұрын

when ever I need to learn about anything tech realated I always stop by Eli. You are an incredible teacher Eli! Thank you for your channel ✊

@djacob9999 2 ай бұрын

Eli the Computer guy is the greatest......tells you like it is in simple language. Great work Eli.

@Oniraz 3 жыл бұрын

Watched this after almost 10 years from when it was created/uploaded and it is still useful and educational. Thanks!

@kimjohnsimon9355 10 жыл бұрын

Thank you for another bunch of knowledge Eli! hope this helps me on my interview :)

@allisonthompson2540 9 жыл бұрын

This was fantastic! Eli, you are AMAZING - thank you so much for the breakdown

@ccastano98 10 жыл бұрын

Great class! I'm glad found your video, it was a nice refresher of my VoIP college class two years ago. I'll keep watching your videos. Thank you.

@AltJisatsu 8 жыл бұрын

Thank you Eli your tutorials are much appreciated. Helping me understand all the concepts for my diploma in networking class. I started at 0 and am much more aware and switched on because of your videos. Thank you.

@awakeningrlz 10 жыл бұрын

I have to say this I've never commented here before: You are the best! Thanks man!

@89Union 10 жыл бұрын

you are the best teacher any IT can have

@riseabovehate9476 5 жыл бұрын

Telecom too

@NousDefionsIntel 12 жыл бұрын

Okay, I have to say that I have been watching video after video after video for the past couple of days. You make the complex seem simple and very easy to understand. You, my friend, are incredible.

@stevewatkins344 6 жыл бұрын

I know this video has been kicking around for some years now and the many others made have led to a new path /position for Eli. Just want to say well done you and take note anyone that knows something worth sharing, make an effort, break it down & open the door for others to learn. This video and plenty more self learning references helped me understand voice and data. Taking the time to consolidate and share the things you learn with others, to help them get out the blocks,is a great thing. I rarely comment on videos but now appreciate that sharing is caring!

@Nakutnyi 8 жыл бұрын

The pronouncing is perfect. I'm not very good in English but everything he says is pretty clear for me.

@kivointegratedtechnologyso7235 4 жыл бұрын

This is great!!.Am now becoming a Voip gulu

@SamFidal 9 жыл бұрын

Eli i love you man

@arvindKUMAR1608 4 жыл бұрын

Still watching this video and not over, I'm amazed by the way you present concepts. You are tremendous. Subscribed your channel

@amirhosseinkhodami762 4 жыл бұрын

Thank you so much, man. I even didn't notice that I spent 1 hour watching this video you teach and talk so fluently.

@sonyaborisova8311 8 жыл бұрын

I needed some explanation of voice over IP for my new job and I'm glad to find these videos. Clear and helpful! P.S. nice voice btw

@kyledude321 4 жыл бұрын

Ditto!

@ZoltanFogarasi 10 жыл бұрын

Thank you Eli. I am learning for my CCNA Voice exam and I was looking for a high view explanation. My wife came into my room and spent about 10 minutes watching your video and was surprised and amazed that she can understand everything. :)

@DGSRizzo 12 жыл бұрын

Great job man. You explain things simply for everyone to understand. You deserve a medal for your work.

@andykeywest 8 жыл бұрын

I was overwhelmed before I watched this. Thank you!

@jayantibhaipatel7505 7 жыл бұрын

Great Tutorials man. very nice introduction about VOIP.

@volfram1 5 жыл бұрын

It's sad when you watch this in 2019 and you are still using technology that Eli refers to as "in the old days".

@misspeach3755 4 жыл бұрын

Why? I set up a dial-operated telephone to work with my router. I love old technology. It's much more charming, easier to fix and in many cases safer (less EMF radiation, harder to breach), too. That digital craze is stupid and environmentally quenstionable (think power hunger) in my eyes. A normal landline is much more robust than an internet-powered telephone (think power outages, router failures, IP-leasing issues etc.; Unfortunately, I cannot afford an additional landline, so I am stuck with my VoIP solution.)

@DillsWork 7 жыл бұрын

Awesome, thank you. Just joined a communications firm in telephony sales and your videos are helping me stay afloat and learn all the new terminology and concepts.

@TheRangeControl 10 жыл бұрын

Eli, you are one of the most reliable and quality consistent "Go To" reference providers that I (as a noob) have had the pleasure of utilizing to date!!!!

@geekyprogrammer4831 7 жыл бұрын

Sir, you should really apply for MIT as an I.T. Professor...you will nail the job!

@tonydegregorio4895 4 жыл бұрын

How dare you!!!! .. .. .. .. ..... How dare you!!!!

@FrankZambaras 9 жыл бұрын

Fone Star -- VOIP doesn't suck! Yes, there are some crappy VOIP phones out there. (There are also some excellent ones.) I run several mid-sized businesses on VOIP. I can accomplish now for literally PENNIES what used to cost an arm and a leg. We no longer even think about "per minute charges" for our call centers. I can distribute personnel however I see fit around the globe without issue. Call quality is generally much better than I was getting thanks to great codecs like g722. Conference calls are a breeze. I could NEVER go back to antiquated old systems like Panasonic, Nortel and the like. I've built many Asterisk solutions for "hundreds of bucks" that completely outperform systems that cost tens of thousands of dollars. Seems like a lot of old "phone pros" feel intimidated by VOIP and Asterisk... Don't. Learn Asterisk. Your clients will love you and your bank account will grow.

@djmaxx007 9 жыл бұрын

***** Indeed! I can back up everything that Frank said. =)

@JDBoelter 8 жыл бұрын

Appreciate the multiple reviews and summaries of previous material as you start new topics - it helps!

@jooptube257 8 жыл бұрын

Whatever topic I search to learn in IT world, you have already prepared very nice and easy to understand videos about it. Just wanted to express my appreciation for all the passion and effort you put in sharing your knowledge. All the best man !!!!!!!!!!!!!