Thank you so much for this great video! I need to understand this to write about it for my company, yet no one at the company has provided a clear explanation to me what the PSTN is. This is such a great explanation. You are one of the truly wonderful technology teachers on the internet because you have simplified this so that a fifth-grader could understand it. Thank you!

You're a VERY good Teacher! Thank you, Sunny!

Sunny, very informative video-and vey funny!😂

Great teaching tool and explained in easy terms. Good job!

Excellent video i was unable to understand it but u clearly visualized what is PSTN.Thanks alot sunny.

Awesome video explaining fundamental PSTN concepts. The slideshow in the middle about signaling is pretty funny also.

Great video! I had to grasp the basics of PSTN for a job interview and you explained it really well.

I love You sunny. You are hilarious while teaching so perfectly.

Very nice way of explaining the design and how it works. Also liked the video editing and jokes too :)

Thank you man, I understood PSTN from you better than my university teacher.

Great video, sir! Thanks a lot. :)

The best qualities of sir is making things simplified 😇😇 Your lecture are way better than my class lecturer 🤣🤣🤣

within small time period , how can you explain what we expect ,Amazing lecturer forever ..! Thanks Mr.Sunny

omigod thank you for this i wouldn't be able to do this without you

Now, while passing my N10-007 I'll associate Sunny's pictures to PSTN, the best way to remind something xD Perfect videos!

Thanks for this

Gracias, explicado muy claramente

Thank you soo much sir i strugle with these again thank you soo much

A couple of very important questions I would love to put to Openreach... 1. I assume if you are offering PSTN to VOIP devices so the dialtone is emulated locally then you will be providing battery backup to enable emergency services calls in the event of a local power outage. Who exactly will be paying for the external battery pack or internal pack in the modems ? If this is the service provider that cost is going to be passed on to the end user. A cost that has always been covered by Openreach in the past with FTTP for example. Who is going to be paying for the equipment to keep a service that has always been a core responsibility of Openreach in the past. Regardless of the method employed Openreach are still responsible for the path from the customer NTE to the MDF.... or directly into the 21CN backbone in the case of direct IP / VOIP services. 2. I assume that unless fully LLU the core of current PSTN users can look forward to huge reductions in call rates and line rentals given that providing a VOIP service is substantially cheaper than a POTS line... No line cards and a large reduction in equipment power consumption at the exchange for example will result in huge ongoing cost savings for Openreach once the equipment change at the exchange is complete, a process that was well underway 14 years ago when I retired as a PTO / SFI engineer. Openreach appear to be trying to act the poor victim when this very long overdue switchover was announced and are complaining about bandwidth usage on the backhaul network. As anyone in the industry will tell you Openreach have been trying to prolong the usage of old slow creaking backhaul links to keep the profits rolling in rather than investing in backhaul links, FTTP and actually blowing new fibres and upgrading modems and switches to cope with an ever expanding increase in traffic. It does make you wonder what network latency will be like when all this additional VOIP traffic bogs down the existing antiquated links. My estimation is that overall latency will increase (something that voip services do not like very much) whilst service providers are left to cover the cost of additional or replacement equipment. As I cannot see directors and shareholders buffering these costs it is going to be the end user that suffers in the end. This is something that has been on the cards for many years. It is NOT something that has suddenly and without warning been dumped in the lap of Openreach to sort out. It is looking like the stopgap solution to this self inflicted disaster is to try and shift as much traffic as possible onto mobile network operators who will sooner or later hit the same problem wall that Openreach is shortly going to slam into... ................. We have an underfunded and under invested network backbone that is not going to be fixed by calling Scotty in engineering and asking for more power to the shields ! If I ever doubted the existence of Karma for corporate bigwigs and greedy investors I am sure that leaning back with my popcorn and watching these people tread water that is up to neck level for the next few years will fully restore my faith in this phenomenon !! Meanwhile I have two empty baked bean tins and a length of string on standby and ready to go. ☺ 😂

thank you!

Thanks Sir 🙏👍😊 Priceless lecture 😊 Something which money can't buy or Something beyond money 💰🥰 I appreciate your hard work from the bottom of my heart ❤️💝

Thanks for helps

Great video... I believe this explains why international phone calls to another person in other country with normal phone is expensive (have to use class 1 phone links)

Thank you so much for this great video! I look you from Azerbaijan

Love from India🇮🇳🇮🇳

Thankuuuuu

Thank you so much Sir Sunny.iam trying to differentiate tandem exchange from transit exchange pliz help

please make a video in which we can differentiate between PTN & OTN

Your brief explanation is pretty cool. Could you please elaborate it more in some other video

Nice video

PSTN stands for Public Switched Telephone Network but in the video it says Public Switched Telephone System.

i love phone hack

sir can you Share these PPT sir

play in 1.5x to save time

peepeeexx xD

chun chu cha chun chana