LINK LAYER AUTHENTICATION

What is Link Layer?

As of July 1, 2025, all MARCS radios will require the P25 Radio Authentication (link layer). This authentication will offer peace-of-mind to system administrators and maximum grade-of-service to end users in an effort to keep hackers off the system and prohibit the stealing of ID’s. This is the first required option MARCS has ever done. The Link Layer update will need to be added to existing radios that were purchased before 2020.

What is MARCS?

MARCS stands for Multi-Agency Radio Communication System. This system is Ohio’s wireless, digital communication network for first responders. MARCS provides fiber optic and microwave technology that enables state, local and federal agencies to communicate instantly with one another during public safety events.

How does Link Layer work?

Link Layer provides a second layer of authentication to avoid duplicate ID’s and added protection from hackers. The P25 radio system initiates the authentication process once the subscriber radio registers with the system. This is done by sending an authentication challenge to the subscriber radio. The subscriber radio returns a response to this challenge which requires knowledge of a unique authentication key.

This authentication will provide an extra level of verification every time a radio registers on the system. It will also enhance protection from cloned radios by requiring authentication before a radio can utilize the system. Radios must be pre-provisioned with an authentication key via the KVL.

What do I need to do to update my radios?

Link Layer updates have begun and as we said, need to be completed by July of 2025. For upgrade information, including programming and loading on the system, contact P&R today at info@pandrcommunications.com

For more information, contact P&R Communications at 937-512-8100,
info@pandrcommunications.com or www.pandrcommunications.com.