Introduction to Voice Over IP

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

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

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

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.

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.

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

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 ✊

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

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

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

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

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!

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

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

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

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 !!!!!!!!!!!!!

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

you are the best teacher any IT can have

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.

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.