Mike, Do you see/have seen in large installations scale-ability issues with phones using TCP? When Ezuce has run tests against the servers which transports have been used?
I just realized that there are actually two places that need to have the transport set: 1. Phone Settings->SIP Serversettings 2. Line Settings->Registration Oddly enough EVEN with both of these settings set to TCPOnly the phones still send a PRACK message in UDP. Kyle On Fri, May 4, 2012 at 1:28 PM, Michael Picher <[email protected]> wrote: > tcp is preferred for HA installations as failover is faster. > > mike > > On Fri, May 4, 2012 at 3:14 PM, Tony Graziano <[email protected]> > wrote: >> >> 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 >> >> _______________________________________________ >> sipx-users mailing list >> [email protected] >> List Archive: http://list.sipfoundry.org/archive/sipx-users/ > > > > > -- > Michael Picher, Director of Technical Services > eZuce, Inc. > > 300 Brickstone Square > > Suite 201 > > Andover, MA. 01810 > > O.978-296-1005 X2015 > M.207-956-0262 > @mpicher <http://twitter.com/mpicher> > www.ezuce.com > > ------------------------------------------------------------------------------------------------------------ > There are 10 kinds of people in the world, those who understand binary and > those who don't. > -- Kyle Haefner, M.S. Communication Systems Programmer Colorado State University Fort Collins, CO Phone: 970-491-1012 Email: [email protected] 01010010 01100101 01100001 01101100 00100000 01101101 01100101 01101110 00100000 01110000 01110010 01101111 01100111 01110010 01100001 01101101 00100000 01101001 01101110 00100000 01100010 01101001 01101110 01100001 01110010 01111001 00101110 _______________________________________________ sipx-users mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-users/
