Basics of VOIP

VOIP

Voice over internet protocol or IP telephony

VOIP technology allows us to make phone calls over internet. Traditional telephone calls depend upon PSTN whereas, VOIP calls depends on the router, switch and internet. VOIP call have overcome the traditional analogue signal by using the digital signal and data packets using the packet switching technology.

An IP Phone to be connected to switch in LAN. Switch transmits the digital packets to other IP Telephone through the router and a internet cloud. It uses RJ45 connector instead of RJ11 connector (traditional telephone/landlines).

There is one private branch exchange (PBX)which helps the switching of VOIP packets. Basically, this is used at business/corporate environments.

It has advantages of high-quality sound with many flexibility options on its operation but still needs a high-speed internet connection.

It gives advanced calling feature at your hand with international calling facility at a lower cost or free. 

It works on H.323 protocol is a standard which describes a set of protocols to provide audio and visual communication over a computer network.

Illustrative IP Telephone from Cisco 

Besides the use of IP Phone or VOIP phone at corporate or larger networks, you can use this technology at home also. All you need the things to choose the right device, right service provider and right connectivity configurations. 

Many IP Phone models lack in automatic security patch update, whereas some cisco IP Phones have this feature which can help in meeting the regulatory risk compliance.

Now, the 7800 Series of cisco supports the latest encryption to help secure your voice communications.  

-DR