Hi All I'm getting tens of thousands of these messages ever hour in the Asterisk CLI for Asterisk 13.22.0: [Apr 20 15:59:46] WARNING[45462]: chan_sip.c:4127 retrans_pkt: Timeout on 1924200000-502043860-301870737 on non-critical invite transaction. [Apr 20 15:59:46] WARNING[45462]: chan_sip.c:4127 retrans_pkt: Timeout on 301794058-652332923-1834701069 on non-critical invite transaction. [Apr 20 15:59:47] WARNING[45462]: chan_sip.c:4127 retrans_pkt: Timeout on 393288224-685421081-2030967079 on non-critical invite transaction. [Apr 20 15:59:48] WARNING[45462]: chan_sip.c:4127 retrans_pkt: Timeout on 1724665510-1751083232-677093666 on non-critical invite transaction. [Apr 20 15:59:49] WARNING[45462]: chan_sip.c:4127 retrans_pkt: Timeout on 1958221882-69806522-85947083 on non-critical invite transaction. [Apr 20 15:59:49] WARNING[45462]: chan_sip.c:4127 retrans_pkt: Timeout on 1013186441-666073546-1030482332 on non-critical invite transaction. If an invite is non-critical, why do it then? What is the purpose of a "non-critical" invite. My server mostly works, with occassional channels that get stuck and need to be hung up manually, but otherwise is working fine. I'm trying to identify what a non-critrical invite is, and if it is non-critical, can it be turned off somehow? Since it is explictily shown as "non-critical" - it means it can be dispensed with, as it is non-critical. Clearly, it IS critical, since it exists, but why the strange semantic of calling it "non critical" - why do something that is non-critical and therefore not necessary. Thanks! Stefan