[Asterisk-Users] About Voip Technology : RTP over TCP

[Andrew Latham]

On 5/13/05, Atul Thosar <atul.mailinglist at gmail.com> wrote:
> hello All
> 
> I am reading information about VoIP technology
> For that i am concentrating on SIP (Session Initiation Protocol) and
> RTP (Real Time Transport Protocol).
> 
> I am interested in implementing RTP over TCP
> I found that there are some disadvantages of TCP, some are
> 
> 1) TCP doesn't support multicasting.

TCP stacks don't always support the standard either......

> 
> 2) Through TCP is reliable, it heavily depends on retransmission of
>    lost or corrupted packets. That increases Delay. Our aim is real
>    time delivery of packets not reliability.

quite the opisite. reliably cheaper calls.......

> 
> 3) TCP congestion control mechanism decreases the congestion window
>    when packet losses are detected.

yes and your point....... 

> 
> Apart from these flaws i am interested in implementing RTP over TCP

read about beowulfs and the use of interconnects over Ethernet......

> 
> Is it possible ?

yes, been done

> What is feasibility of implementing RTP over TCP ?

see above

> 
> One more point is What is feasibility of implementing RTP over TCP in
> case of NAT (Network Address Translation) is there ?

what port? DNAT? SNAT? loaded question.....

> 
> Need your valuable suggestion.
> 
> Thank You !
> 
> Atul Thosar
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