H hershyheilpern New Member Jun 5, 2018 1 0 1 28 Apr 3, 2019 #1 i use a lot the yealink T21p and a lot of times they are under a NAT sometimes it dose work and sometimes not is there something i can do o make it work
i use a lot the yealink T21p and a lot of times they are under a NAT sometimes it dose work and sometimes not is there something i can do o make it work
A ad5ou Active Member Jun 12, 2018 893 205 43 Apr 3, 2019 #2 Enable "rport", use keep alive, and set short registration times. Make sure firewall does not have any type of "sip helper" or sip alg enabled.
Enable "rport", use keep alive, and set short registration times. Make sure firewall does not have any type of "sip helper" or sip alg enabled.
DigitalDaz Administrator Staff member Sep 29, 2016 3,089 588 113 Apr 3, 2019 #3 A said above, rport + regisration timer at 120 and also transport tcp
