First I would like to describe my installation to have the guideline to my problem.
I am supporting an Asterisk Installation running with minimum problem for the last 2 years. We have 2 companies connected by IAX with a total amount of 80 users, 10 users are allocated outside of the HQ, they work in small offices that have the SPA 942, SPA 922 and SPA 962.
These users are connect to the HQ of the company.
In the last 18 months all the 10 remote users were working ok with no problem at all, we were using an static IP.
Because of commercial issues with the internet provider I was forced to work with a new one that at the moment is offering a connection Optics Fiber with 100mb/20mb connection.
In the present the service is not able to have a static IP, so I made a account in Dyndns and with the dynamic pointer made by the router I am supporting 3 VPN'S, 1 MS Exchange, 1 game platform, 1 asterisk, FTP and http page for intranet and CRM.
The connection IP on the 10 remote SPA are also pointing to the Dynamic DNS and they run ok in the first Boot.
Now the problem, or better the Question:
The ISP connection renewing the public IP in 72H, in this case we may have a period of time that the SPA will try to re-connect to the dynamic DNS with no success of course.
This is the problem, after the reconnection of the ISP service with the update of the dynamic DNS the SPA will not be able to resolve the new IP address.
The key line will be yellow (amber) and it will not be possible to the SPA resolve the new IP, it appears that the SPA is blocked with the old IP and it is not possible to clear is memory.
Only after a new restart, or a new boot the SPA will resolve the new Dynamic IP and it will work fine immediately.
Please keep present that when we have the new reconnection of the new IP the others services will be working ok, it isn´t a problem of updating the dymanic IP, it's a problem of resolving the new dynamic IP in the SPA.
So, how is working the DNS in the SPA 9xx models?
- is it updated only at the first boot?
- doe it allow to work like " a real" dns service?
- why I only loose the register service and the others key assign to "extensions" are able to refesh the new IP? SPA 942 and SPA 962?
Please fell free to pm me in order to have some more details.
All the SPA are running the last firmaware available 6.1.5a
Please advice when possible, I need to solve this problem and one of the alternatives is to replce the SPA of these 10 users by other IP telephone.