Are you looking for support from US? GET SUPPORT
Your session has expired.

Your authenticated session has expired due to inactivity. You can close this message and continue as a guest or sign in again before proceeding.


Multichannel, factory-built P25 RF site

The Expandable Site Subsystem (ESS) is a complete multi-channel, GTR 8000-based RF site in one rack including: station/repeaters, site controllers, networking, power supplies and RF distribution systems. The ESS supports P25 trunking & conventional, FDMA & TDMA, voice & data.


Simplified deployment

Factory cabled, tuned and tested to your requirements, the ESS integrates site controllers, networking, RF distribution system and up to six channels in a single rack. Simply connect power, networking and antennas and you're ready to go.


Connect multiple ESS cabinets together to expand site channel capacity. Combine mixed channels including P25 FDMA trunking, P25 TDMA trunking, and conventional.

Service made easy

Front access to hot-swap modules makes servicing the ESS hardware quick and easy. Software configuration and upgrades can be done locally or remotely. Remote access to fault management data for troubleshooting. All of which minimize downtime and site visits.


Protect against service disruption with no single point of failure. Redundant electronic components, power and networking means more availability.

The complete P25 solution

P25 infrastructure


Site equipment, transport and integration. From a small conventional system to a statewide trunked network.

Explore infrastructure
P25 radios


When lives depend on you, you need a mission-critical communications device in your hand.

Explore radios
P25 dispatch solutions


Empower your dispatchers to coordinate faster. Choose from our portfolio of consoles and keep your teams safe.

Explore dispatch
P25 software applications

Software applications

Add intelligence to your system. From tracking to keep personnel safe, to encryption to keep radios secure.

Explore software
P25 infrastructure services


Maintain mission-critical performance. From light-touch support to full network management.

Explore services




Expandable Site Subsystem Specifications

G-Series Specifications

Download the detailed product specifications.

ASTRO P25 Radio Systems Brochure

ASTRO Radio Systems Brochure

Learn more about our ASTRO solutions.

Product Catalog

Please wait...