I just received a new SPA 525G in replacement of my old ones. I tried to configure it on my IPBX, but impossible to get authentication.
The IPBX see well the phone, able to receive internal calls and out calls, but impossible to make one as i got a "Forbidden" message displaid.
I installed the new firm just before registering it on my IPBX and i was wondering if an older firm will help.
Is there any way to download a firm older than the 7.2.5? I tried to find on Cisco portal the 7.1.7, but the link is not available anymore.