Had this for slightly over 2 years and it has been plagued by problems connecting and keeping connections up.
It is always line#1 which is having issues. Tried switching port##, using UDP and TCP, mucking around with NAT to no avail.
Never mind that it takes forever to boot up and connect, often after a reboot it just won't register until I go into the line# and hit Apply, then it is magically registered on line#2. This trick does not work for line#1 but shortly after line#2 is registered, line#1 would register too.
This was bought to replace a retiring PAP2T which started rebooting every 10 seconds. Never had any issues registering with PAP2T!
Grandstream support blames the router w/o even looking into the issue. They never asked what sort of router, just told me to replace it. FU.
It seems to work much better with TCP and NAT keep alive turned on for both line#1 and #2. At least it is not dropping registration that often. Line#2 keeps registration 100% of the time once it registers, while line#1 keeps losing registration several times a day.
Ports 5060 and 5061 worked fine with PAP2T, they never seem to work with HT702, which wants 20000 and 20001 for some reason. And they only work if there is a NAT entry to forward to HT702, where PAP2T did not need any NAT set up at all on the router. What am I doing so wrong with Grandstream which Linksys just figured out all by itself?
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