No Service on aastra phones when internet connection is down

tfcarlin · #1 10-09-08, 08:56 AM

Hi:

Any ideas why all of my internal phones would go to the "No Service" state when my PBXiaF (1.3) server's connection to the internet is lost? This prevents any internal calls or use of a POTS line.

Thanks,

Tim

TheShniz · #2 10-09-08, 09:04 AM

Yeah, this is a fundamental issue with Asterisk that's yet to be addressed, and unfortunately Aastra telephones are by far the worst of them all at handling it. If you have any other manufacturer phone, you're probably fine. The only resolution there is, is to install "DNS w/ Caching" and point all the telephones to it... even then, Aastra phones may still be a bit finicky. More than likely, if you log into Aastra's WebUI, they are all reporting SIP408's (and will need to be rebooted as well).

Code:

yum -y install caching-nameserver
chkconfig --level 345 named on
nano /etc/resolv.conf
 > Prepend: "nameserver 127.0.0.1"
reboot

jroper · #3 10-09-08, 09:15 AM

Or use IAX trunks rather than SIP trunks, like the ones supplied by the PBX in a Flash VOIP service

http://usasignup.pbxinaflash.net/A2BCustomer_UI/

http://eusignup.pbxinaflash.net/A2BCustomer_UI/

This is a known issue with SIP trunks and Asterisk.

Joe

markiper · #4 10-09-08, 03:46 PM

Back in the time of AAH or Trixbox, I could solve this issue by adding to SIP.CONF the following line:

[general]
srvlookup=yes

I have not tried this in PiaF, but it will be worth the try. If your internet goes down, that instruction used to take care of the problem with ANY SIP phone on your network.

Regards,
markiper

cjkeeme · #5 10-09-08, 04:29 PM

There is now way for me to test adding the line markiper suggests to sip.conf, but if anyone is cable of testing the above command I would appreciate it today.

Today I had a main internet line go down and a secondary internet line go down and was left with no phones for 1 hour. I think it silly that my internet connection needs to be active in order for my analog phones to function properly.

jroper · #6 10-10-08, 04:08 AM

Hi

I'm sure you could do something to make your PBX think it has not got an internet connection.

Change the gateway address of Piaf.

Do you have any sip trunks?

Joe

TheShniz · #7 10-10-08, 10:48 AM

I believe the accepted procedure to try (if I remember right) was to establish a SIP trunk w/ a SPA3000, and to ensure it was listed first (via naming). As registration would never go down, it should resolve the issue. Unfortunately, this wasn't the case, and was eventually proved wrong. This issue persists even today... perhaps Asterisk 1.6 will resolve this, maybe not... I dunno.

markiper · #8 10-11-08, 02:52 PM

I have tried my previous suggestion, but apparently it does not work anymore. Has anyone in the forum come up with a proper way of solving this issue when you are using SIP extension?? Any comments/suggestions will be appreciated.

Regards,
markiper

drmurdoch · #9 10-11-08, 03:07 PM

I'd be interested in this as well.
I will keep my POTS phones handy in case the internet goes down.

Phone_User · #10 10-12-08, 08:14 AM

I have found with the aastra phones this is because it cannot connect to your DNS server. I have one location that had this problem continuously.

To fix it set up a local dns server on your PBX. Make sure your dhcp server (or router/switch/gateway) hands out your local dns with it's addresses.

Then if your internet goes down your phones should still work, unless of course you have no pots lines then of course you will have no service.

Rob