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Difference between VoIP and Voice chat over internet

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Kashi

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how to chat over internet

Dear All,

I want to know that what is the basic technical difference between VoIP and the voice used in different messengers.

Regards,

Kashif Saleem Mirza:D
 

difference between rtp and udp according to voip

Hi Kasif
Refer SIP,H323 Protocol articles you will get answer
Regards
Pcup
 

embed voice chat

These refer to only VoIP and I know about VoIP.
I just want to know how voice processing occurs in Voice chat.

Regards

Kashif Saleem Mirza
 

i want to voice chat with pakistanis

What do you mean about Voice Chat?
VoIP needs a RTP connection to be established between users.
Voice messages can be sent as a form of instant message.
For instance SIP is a signaling protocol used to create an RTP media connection between users. But SIP can carry messages embedded within it's body without the need of setting up a RTP connection.

Added after 2 minutes:

so a voice message can be embedded inside a SIP message without the need of RTP (This isn't standardized by the standard only text messages can be embedded)
 

voice chat embed

But I have a confusion,

Now a days SIP is being used to carry voice using the concepts of NGN. Although SIP is used to establish connection, but when connection is established, which protocol is then used to carry voice packets? (RTP, H.323, H.248, UDP)
 

embedded voice chat

Well SIP and H.323 are signaling protocols they're used to establish the media connection. RTP is a transfer protocol witch carries the time sensitive media.
by design SIP messages are usually very small around 40-50 bytes so they can carry text embedded in the message body, an extension to SIP allows the use of larger messages which can carry embedded voice and or file attachments but this brakes te basic SIP principles of using small messages and preferring UDP for transfer.
H.323 is a binary protocol and can't be extended as simple as SIP which is a text based. RTP carries the voice data after the media connection has been established, on the image you can see the IP multimedia protocol stack and their interaction.
 

difference between voice chat and text chat

By the way SDP is an acronym for Session Description Protocol and it's used to negotiate the type of media session established: audio, video etc, the type of codec used, the ports used for RTP etc.
All tho used with SIP it was developed for Multicasting and it's version is stil 0
:)
 

protocol used in voice chat

I Hope this pic Helping you

Sokrat
 

chat over internet

The Pic is nice but it's important to mention that the route of the SIP packages does not depend on the route the RTP media travels which reminds of SS7 signaling in PSTN networks.

Added after 6 minutes:

For one to use SIP you don't need new expensive hardware, only a software upgrade to Web servers and end devices. All security protocols used for secure browsing like http digest and especially TLS can be used to make SIP very secure. So setting up a VoIP network with SIP signaling is extremely easy, very cheap and the services provides match and extend that of existing PSTN networks.
 

similarity between voip and voice chatting

Well, I have studied some of the NGN Networks. There is a device called "Add drop Multiplexer".
I am unable to understand the function of this device. I will also appreciate if someone can help me about the functionality and working of Softswitch.

Regards,
Kashif:D
 

difference between isdn and voip

I'm not sure what U mean by NGN (next Generation Networks ?). Add\Drop Multiplexers are commonly used in SDH (Sonet in the US and Japan) Optical networks As the name says they are used to Add or Remove individual streams from the SDH Virtual Container with out demuxing the entire VC stream. Just to be clear SDH is used for the transport network not for the access or for the switch.
A softswitch as the name implies is a software switch, and is assosiated with Voice over IP, for instance a server implementing SIP is a SoftSwitch, unlike the TST (STS) TDM switches witch exist in hardware a SoftSwitch is a logical most often a software entety.
One of the biggest importance for SoftSwitches is therir smaller cost compared tho hard or TDM switches.

Added after 3 minutes:

In a soft switch part of the logic is distributed to the end users making the network decentralised, unlike PSTN or ISDN network witch use a hard switch and use central processing and need a lot of processing Power. Usually a soft switch doesn't need much resources.
 

difference between voip and voice chatting

BY NGN I mean Next Generation Networking.
A network which has a softswitch, Media Gateways, IP Muxers, GMuxer and ADM(Add Drop Multiplexer)
 

difference between video chat and voip

So an NGN is a combination of a classical PSTN/ISDN perhaps a GSM/3GPP wireless and VoIP networks, as Media Gateway And Media Gateway Controllers are usually used as Gateway controllers between VoIP and other networks. The trnsport streams in PSTN are usualy SDH so there we can have the Add/Drop Multiplexers (VoIP doesn't use any kind of Muxing it uses a direct RTP stream over UDP) usualy used to carry the VoIP traffic to the Central Switch.
:p
 

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