Distinction between VoIP and IP Telephony.


Key Difference:

The terms VoIP and IP Telephony are regularly utilized reciprocally. Generally, the two terms are basically the equivalent. In the event that one must separate between the two it very well may be said that VoIP is a particular sort of IP Telephony.


The terms VoIP and IP Telephony are regularly utilized reciprocally and there is a reason behind that. For the most part the two terms are practically the same. Both of them refers to the concept of making phone calls. over the Internet.

The details of it, and how each work might differ, but the core concept of both of them is same.

If we differentiate between two it can be said that VoIP is a specific type of IP Technology. IP technology refers to any service that uses the Internet Protocol, basically the Internet. This refers to services such as voice, fax, sms, voice-messaging, etc.


Over the Internet VoIP refers specifically to transfer the voice over Internet Protocol.


Generally, public switched telephone network (PSTN) was used top make phone calls or transfer certain data. In any case, after the improvement of IP, it in light of the fact that very quicker and simpler to move information and make brings over the web. 

The process of transferring the voice is exactly the same as it would be on PSTN, instead of being transmitted over a circuit-switched network the data is packetized, and transmitted as IP packets over a packet-switch method, Hence IP telephony and VoIP was ideologically the next step in the progression from PSTN.

An additional advantage of VoIP and IP Telephony is that it is similarly less expensive than customary (PSTN) Phone system. The customer does not have to incur any additional charges than the internet connection that they already paying for, whereas the PSTN, they have to get a telephone line put in.

In most of the cases, the terms VoIP and IP technology are used Interchangeably and are often even used as synonyms for each other , even within the Industry.

The only difference between them that VoIP refers specifically to Voice over Internet protocol,
Whereas, IP telephony may be used to refer at all, voice, fax, sms, voice messaging, etc.

Another Difference:

Another difference is that VoIP sometimes uses an IP PBX (Private Branch Exchange) to distribute calls.

Whereas IP technology (as used in Industry) builds up on VoIP technologies and does not need to use a PBX.

Correlation among VoIP and IP Telephony:



1. VoIP stands for Voice over Internet Protocol.

2. Transfers voice and allows for phone calls over the Internet.

3. Transfers only Voice.

4. Provides service of Only Phone calls.

5. Benefits of VoIP is faster and cheaper than traditional phone system, i.e. PSTN.

6. It may require PBX.

IP Telephony:

1. Stands for Internet Protocol telephony.

2. Transfers voice for phone calls, data for fax, sms, etc. over the Internet.

3. Transfers Voice., FAX, SMS, Voice-messaging, etc.

4. Provides services like Phone calls, fax, SMS, Voice-messaging, etc.

5. Benefits of IP telephony are Faster and cheaper than traditional phone systems, i.e. PSTN.

6. Usually it does not require PBX.

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