Grenzschütz-Abschnitts-Nachrichten-Kompanie 30 (Border section news company 30).
Now as I've said, this was merely the supply unit to the main unit and all we can find out about this replacement company is that it went to the Corps Signal Battalion 437. From there it seems to disappear. It was probably based in the Netherlands in 1942 but that's as much information as I can find.
As I've said, tracing German tags is a full time job all in itself !
RRPG