Nikolay Kondratyev Posted December 15, 2008 Report Share Posted December 15, 2008 Hi, We use pbxnsip version 3.0.1.3023 (Centos). I have set up a trunk with outbound proxy "m600.lab.nstel.ru". Pbxnsip does NAPTR lookup for "m600.lab.nstel.ru" and gets two records: [8] 20081212172627: DNS: Add dns_naptr m600.lab.nstel.ru 20 10 s SIP+D2U - _sip._udp.m600.lab.nstel. ru 25 15 s SIP+D2T - _sip._tcp.m600.lab.nstel.ru My understanding of rfc 3263 and 2915 is that a client must select a transport acoording to the lowest 'order' field in the NAPTR record. In my case it should be UDP, nevertheless pbxnsip uses tcp when sending calls to m600.lab.nstel.ru. My opinion is that this behavoiur does not correspond to the standards. Am i correct? Please clarify... Thanks in advance, Nikolay. Quote Link to comment Share on other sites More sharing options...
Vodia PBX Posted December 15, 2008 Report Share Posted December 15, 2008 We use pbxnsip version 3.0.1.3023 (Centos).I have set up a trunk with outbound proxy "m600.lab.nstel.ru". Pbxnsip does NAPTR lookup for "m600.lab.nstel.ru" and gets two records: [8] 20081212172627: DNS: Add dns_naptr m600.lab.nstel.ru 20 10 s SIP+D2U - _sip._udp.m600.lab.nstel. ru 25 15 s SIP+D2T - _sip._tcp.m600.lab.nstel.ru My understanding of rfc 3263 and 2915 is that a client must select a transport acoording to the lowest 'order' field in the NAPTR record. In my case it should be UDP, nevertheless pbxnsip uses tcp when sending calls to m600.lab.nstel.ru. My opinion is that this behavoiur does not correspond to the standards. Well... Today NAPTR is practically non-existant. The PBX should sort after the priority, not sure what'S wrong here... But IMHO the best way to deal with this is to avoid NAPTR at all. It is asking for trouble, and we don't want that! Quote Link to comment Share on other sites More sharing options...
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