Hi there! I use opensip 1.7.2 and noted retransmissions of INVITEs in 450ms despite the fact I got 100 Trying from my external carrier. FYI: 1) it's is from opensips exactly (not from UA). 2) Opensips sends absolutely same INVITEs (same cseg, tags, etc).
I can be wrong but RCF says: "After receiving a 1xx response, any retransmissions cease altogether, and the client waits for further responses." I also a bit wondering why retransmissions happens after 450ms (not 500ms according defult T1_timer). Should I use modparam("tm", "own_timer_proc", 1) ? Its also strange that Opensips ignore 18X messages which come to retransmissions INVITE. It happens till 6 sec (when fr_timer exceeded) Please advice. Thanks.
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