This happened to a friend of mine, his house didn't take a direct hit but it was close enough to the phone cable to carbonise his phone wall socket, literally blow up his modem router and fry his motherboard. The smell of burnt plastic and carpet was quite evident when I went round to asses the damage. How his house didn't go up in flames, I don't know.
He had a surge protector for his electric mains with telecom protection too but he didn't have his phone/router connected. As it happens, even if he HAD connected his phone through the surge protector they are not designed to stop damage from such a close lightning strike.
And this is the message.
If you want to protect your phone line from lightning strikes you need to get a surge protector that specifically states that it can cope with lightning.
Belkin do something called a SurgeCube and there are probably more products to be had. After fixing my friend's setup, I made sure we both got one of these things (I didn't have one previously) - well worth the £5 I paid off Amazon.