I have got a big problem.
My Gateway (Cisco 2600) IOS version 12.2(5a) makes problems if I will make calls.
When I am calling from my Ip telephone to an external number then the router breaks down and starts booting. That isn´t normal, is it?
Is that a hardware problem?
I tend to agree with you, it’s likely a bad load, or software image. Try upgrading, and if that doesn’t fix the problem then have a look at the hardware.