radio silence

noun3

1. •
   A status maintained where all fixed or mobile radio stations in an area stop transmitting (sometimes limited to certain frequency bands).
2. •
   The period of time during which this status exists.
3. •
   (figurative) A period of time during which nothing is heard from a person or organization, especially when such communication would normally be expected.

   • After the abuse scandal, the company went into complete radio silence.