Covid 19 Update: Given the current global situation, we have paused the delivery of our LiveOnsite courses, but our LiveOnline and OnlineAnytime Packages remain unaffected. Browse over 50 online courses in our course catalogue, or get in touch to register your interest in future LiveOnsite courses when we are able to safely resume in person training.

CRL - Certificate Revocation List

Digital Certificates are only valid for a specified period; if, after this period, they are not renewed by the owner they are revoked. Revocation may also be applied to certificates that may have been compromised. All revoked certificates are listed and may be viewed through the CA (Certification Authorities) web site. These lists are issued on a regular basis by the CA, and prior to a dialogue being established between end parties this list should be checked to ensure the integrity of the parties involved in the communication.


  • Fully interactive 3GPP based network map
  • Narrated call flows
  • Detailed network procedures

Explore NetX today with a
free trial.
More Info about NetX