You can connect your VoIP number to many devices so they can receive and send calls over VoIP. Therefore, you can link the same VoIP number to your cell phones, computers, and tablets so that you can receive the calls on all devices at the same time. The problem is, I can call from any building, but I haven’t received any more calls recently, or simply not in the building where the phone is ringing. I’m not worried about how to connect a normal landline phone (analog if you want) to a VoIP device.
Yes, the best way to do that is to replace the phones with a multi-portable handset with a base station. If you have remote workers or travel frequently to business conferences, a VoIP number gives you access to all the options and features you have in the office. Since all cordless telephones can then access the voice mail, you can place the base in the basement and have a cordless handset in the kitchen. So there’s no reason why a traditional basic phone connected to a VoIP ATA device can’t have extension phones in the house?
Most people who need that many phones simply use cordless phones and the adapter plugs into the cordless base. Although a VoIP number appears to be similar to a traditional PSTN number, there are numerous differences between the two. A VoIP number is essentially the number that identifies a VoIP user on the IP network, as opposed to the PSTN. As a result, you can link the same VoIP number to your cell phones, desktops, and tablets to receive calls on all your devices at the same time.
The phone in the bedroom is 1.0, I couldn’t find the value for the phone on my wife’s desk, but it’s probably weak as it’s powered for the answering machine. If you simply want to replace your landline, simply connect your existing telephones to the ATA as one line. This should not result in more static than currently. You can also fix the issue by unplugging phones and plugging one directly into the ATA if that happens. So it wouldn’t be difficult for me to patch a VoIP device located there to send the “calls” to different telephones in different rooms. You should be able to use the same settings on multiple devices so they all ring at the same time, even on a smartphone. However, check with your provider whether this is allowed and whether anything needs to be changed about the router.