I See a Black Screen and Can’t See or Hear the Subscriber I See a Black Screen and Can’t See or Hear the Subscriber

I See a Black Screen and Can’t See or Hear the Subscriber

Maria Scieranska

Symptom

I can't see or hear the subscriber. I only see a black screen.

Applies To

  • Video API
  • Video Quality
  • Audio Quality

Resolution

Run the Pre-call test on the client in order to determine if the right ports are open.

Cause

This problem usually occurs if there is a firewall that is blocking the user from making a streaming connection.

Articles in this section