The only time I have seen issues with this is with sbc's. In those cases we set them to use tcp for large packets.
I think once the ua establishes the connection it should not change. What are you seeing? On May 4, 2012 3:08 PM, "Kyle Haefner" <[email protected]> wrote: > Hi All, > > What is the recommendation for transport with Polycom phones? The > default is UDPonly and it looks like the DNS records have TCP and UDP > evenly weighted. > > I've been noticing some inconsistency with presence subscriptions and > I think it may be tied to fragmentation and UDP (subscribe packets are > often larger that 1500 bytes, not all of our switches support jumbo > frames so we can't realistically increase MTU) > > Is setting all phones to TCPPreferred enough, or do I need change DNS as > well? > > -- > Kyle Haefner, M.S. > Communication Systems Programmer > Colorado State University > Fort Collins, CO > Phone: 970-491-1012 > Email: [email protected] > _______________________________________________ > sipx-users mailing list > [email protected] > List Archive: http://list.sipfoundry.org/archive/sipx-users/ > -- LAN/Telephony/Security and Control Systems Helpdesk: Telephone: 434.984.8426 sip: [email protected] Helpdesk Customers: http://myhelp.myitdepartment.net Blog: http://blog.myitdepartment.net
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