https://en.wikipedia.org/wiki/AGM-154_Joint_Standoff_Weapon
>This email/doc dropped few months back- was surprised no Anons picked up on the last lines of it; STANDOFF WEAPON
your OP asked about the standoff weapon
>In November 2003, TAT-14 suffered two breaks within weeks of each other, first on the southern link between the US and UK, then on the link between France and the Netherlands
This may be relevant to what your looking for though. What caused the break?
>Yellow / AC-2 (Atlantic Crossing 2) is a submarine telecommunications cable system linking the United States and the United Kingdom.
This also
If the AGM can be used similar to a JDAM i believe it could be used to sever the cables as in the TAT 14 situation.