If you talkin abot the fact that the landline phones are wireless and because of that yopu want to connect your cell phone to them through the router it won't work because the sattelite phones operate on a different frequency. If they did operate on the same frequency then you would be gfetting interference on the network when they were in use , so for that reason they opperate on a different frequency.
If by some chance you could change the frequency of the sattelite phones then there might be a chance that they could connect but there's no guarantee that it's possible.