Cox digital phone works fine with any security system. If your alarm company doesn't know how, I say get a new alarm company. VOIP/SIP has been the standard for almost 2 decades now. It's just a matter of wiring it a bit differently.
1. They can't give a choice because they can't leave a entire outdated system in place just for a few users.
2. They did give notice. Do you have a email address on file with them? At-least I got notice.
3. The solution is very simple. It's usually just a matter of changing where you connect the phone line feeding the system. Before it came from the demarc, now it comes internally from the phone modem. Any security technician not knowing this must not have worked on a system in 15-20 years.
See this post another user did which breaks down the issue technically. I almost wonder if they made the post because of this post.
