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P25 Radio System
STRENGTHENING SHELBY COUNTY’S PUBLIC SAFETY COMMUNICATIONS

P25 TowerThe Shelby County Alabama P25 radio system (SCP25) went into production on January 21, 2015. The objective of the project was to provide Countywide P25 based interoperable radio communications for County law enforcement and other first responders (fire, rescue, emergency management) for public safety actions.

The ability to communicate across the entire 808 sq. mile County area provides a digital radio foundation that is expandable to other public safety agencies and public sector departments with interoperable communications. Ensuring that neighboring jurisdictions and multiple disciplines can communicate with each other leads to better emergency and disaster response and ultimately makes for safer communities.

Shelby County built its digital radio system with the latest most efficient communication technology using the Federal P25 Phase 2 TDMA standards and protocols. The County wide public safety interoperable communications system is known as the SCP25. SCP25 is a network of communications towers, subscriber units, networking backbone, communications software and dedicated technology support professionals. The SCP25 system serves two primary functions:

  • Providing internal communications capabilities for County departments, including but not limited to the Shelby County Sheriff’s Office, Emergency Management Agency with Shelby 9-1-1.
  • Providing a Countywide interoperability platform and access for local agencies to achieve interoperable communications with local, state, regional and federal agencies.

The network operates five tower locations with six channels in a simulcast P25 TDMA phase 2 radio system that utilizes predominantly VHF high band spectrum. The Phase 2 standard is a 2-slot TDMA signal that fits inside a 12.5 kHz wide channel. All agencies wishing to utilize the SCP25 system are required to execute a County contract services agreement.

For more information about SCP25 email  or visit Shelbyal.com/SCP25.

P25 Tower Map

Shelby County, Alabama
200 West College St.
Columbiana, AL 35051
Ph: (205) 670-6550