2 ms·

Can you provide more details? I haven't heard of this one and hope to educate myself better if it really is possible.

• toast0 10y ago
  This is a potential concern with traditional analog POTS. There isn't an explicit signal to end the call on the analog side. Some switches take longer than others to detect when your phone goes on-hook and end the call. If yours takes a long time, then on the plus side, you can hang up one phone, walk to the other side of your house and pick up the other to continue a call, but on the minus side, an attacker could play a dial tone at you and trick you. This can happen with connections between switches too, potentially; but modern (like 1980s modern) out of band signaling techniques on trunks generally prevents this type of thing.