SIP Trunk 403 Forbidden during JMeter SIP Load Test

Having some issues getting my configuration to work… JMeter 5.6 sending INVITEs to Genesys Cloud US1 SIP URI. Getting 403 Forbidden immediately.

  1. Configured SIP trunk with correct credentials in Admin.
  2. Running JMeter SIP plugin with 10 concurrent threads.
  3. Logs show authentication failure despite correct password.

Is there a rate limit on SIP signaling?