[SIPForum-techwg] TCP vs. UDP (SP adoption of TCP?)

[Dan York]

Greg,

While I agree with your sentiment and like your phrasing ("We need to  
accommodate the past while we drive the future."), I do have one  
question about this part of your statement:

On May 19, 2008, at 2:38 PM, Zweig, Greg wrote:

> There are many products in-use that could be upgraded to
> other facets of a SIPconnect 1.1 implementation but will never cost
> effectively support TCP.


DY> Do you/we have a sense of how many of those products there are  
that will "never cost effectively support TCP"?  In my brain I have  
the view (and maybe this is just *MY* perception) that the major  
equipment at an "end customer" location is going to be premise devices  
like IP-PBXs, SIP gateways, SIP application servers, SBCs, etc.   Most  
all of the ones with which I am personally familiar support both SIP  
over UDP and SIP over TCP (with the notable exception of Asterisk  
which only supports SIP over UDP last I knew).

DY> Are there a large % of premise SIP servers/proxies/etc. out there  
that only do SIP over UDP?

More curious than anything else,
Dan

P.S. Or for "end customers" were you also talking about service  
providers on the other end of the SIPconnect pipe?  (Realizing that  
*your* "end customers" may be very different from *my* "end customers".)
-- 
Dan York, CISSP, Director of Emerging Communication Technology
Office of the CTO    Voxeo Corporation     dyork at voxeo.com
Phone: +1-407-455-5859  Skype: danyork  http://www.voxeo.com
Blogs: http://blogs.voxeo.com  http://www.disruptivetelephony.com

Build voice applications based on open standards.
Find out how at http://www.voxeo.com/free