SIP trunk doesn't reconect after internet problem

[mmg_asterisk]

Hello, thanks for reading

I've a problem when internet connection interrupt, and after a while it comes back.
When it happens, my trunk doesn't work as usual.
If I execute sip show registry, I see it registered, but when I try to make a call, I obtain "all lines are busy" message, although I can recieve incoming calls.
I can only fix this problem executing "module reload"

Does anyone have an answer?

My config:

username=TRKxxxxx-xxx
type=friend
trustrpid=no
sendrpid=yes
secret=xxxxxxxxxxxxxxx
qualify=yes
maxexpiry=120
insecure=invite
host=trk.cpsnet.com.ar
fromuser=TRKxxxxx-xxx
dtmfmode=rfc2833
disallow=all
context=from-trunk
canreinvite=no
allow=ilbc

register string:
TRKxxxxx-xxx:xxxxxx@trk.cpsnet.com.ar/TRKxxxxx-xxx

Thanks again!!
Marco

[david55]

At a guess, you have a dynamic address and your address has changed.

[mmg_asterisk]

Thanks for your answer!

I don't think so, but, if this was the problem, how can I fix it automatically? without my intervention..

Regards

Marco

[david55]

Set maxexpiry as low as you can get away with.

[mmg_asterisk]

I continue with the same problem! I'm crazy with it!

sip show registry shows request send
CLI shows attemping #1500
module reload doesn't fix the problem
Only rebooting

What can I do?

Thanks! Thanks! Thanks!
Regards!

[david55]

Check that Asterisk is sending to the correct IP address, and the Contact and IP level source address are correct. Check whether there is a reply. If there is a reply, compare Call-ID and tags. If they are sent to the correct address, and there is no reply or the ID's mismatch, you have eliminated Asterisk.

[mmg_asterisk]

I don't understand...
Is it clear that sip trunk works for a time and for some reason which I don't know, start "all circuits are busy"?