Sip trunk unreachable sporadically

Asterisk Asterisk Support
1

Hello, I have a sip trunk set up with my voip provider like this:

allow=ulaw&alaw&g729
authuser=xxxx
disallow=all
fromdomain=sip.nonoh.net
fromuser=xxxxx
host=sip.nonoh.net
insecure=very
nat=yes
qualify=yes
secret=zzzzzzz
type=peer
username=xxxxxx

about one or two times a day i get trunk unreachable when i do sip show peers.
sometimes i fix this inmediately doing sip reload or reboot .
I have dynamic external ip with adsl internet line.
When my trunk is OK i tested shutting off-on my modem router to get a new ip but that not make the trunk unreachable.
i know provider is ok because a can login direct with a ATA or sipphone
how can i fix this
thanks a lot

2

Try to remove the qualify=yes statement; if you want to keep it for some reasons, try qualify=30000.
Otherwise the default for Yes is 2 seconds (2000).

3

My solution was set qualify no and its fine so far.
what can be the drawback?

4

Great. Have a look here:

voip-info.org/wiki/view/Asterisk+sip+qualify

basically it means you can send calls to the server while it’s offline or unreachable; the ‘yes’ option is to help you prevent this from happening.