



Central Ohio Interoperable Radio System
Serving the safety & service forces of Delaware County, Dublin, Hilliard, Worthington and Upper Arlington




Today crews broke ground for the new Hilliard/Darby tower site. The site, which is a partnership between COIRS and Verizon Wireless, will be a 190′ mono-pole tower with two shelters that will serve both entities and provide much improved public-safety radio and private 3G/4G coverage throughout Hilliard and Norwich Township. Completion is expected by the end of September.
As of today, the concrete pads have been poured and the base for the tower is ready.



The upgrade of the COIRS radio network and dispatch center consoles was completed today. Motorola experienced problems bringing the south simulcast up, but we were able to operate Dublin, Hilliard and Worthington off of the Delaware simulcast while the problems were resolved.
All subscribers, talk-groups and consoles are up and fully functional. There are some minor punch list items that remain relating to console configurations that will be resolved tomorrow.
Thank you to Shannon McMellon, Kim Link and the entire team at Motorola and B&C for their excellent work today. Also, thank you to the dispatch staff who worked seamlessly through the interruptions to ensure public safety was never compromised.
Starting on today at 9am, Motorola will complete the upgrade to the COIRS radio system. This upgrade involves a “hard cut” over to the new system and will affect all agencies in Delaware & Franklin County that use the COIRS system. Below are the details of the cut over plan and what to be prepared for when it occurs:
If you have any questions, contact Jay Somerville or Patrick Brandt.
The network connectivity for the new 7x upgrade was completed to the primary sites was completed and passed testing earlier this month. An upgrade cutover date has been set for Tuesday December 9th. A detailed schedule for the cut over will be provided by December 5th. Access to the system will remain available during the cutover with the exception of console connectivity.
The transition of the Hard Road site will take place starting December 3rd when that site will be taken off line to allow for fiber upgrades and the addition of the new hardware. The installation of the Hilliard Darby site is still pending final design and construction by our partners at Verizon.
If you have any questions about the upgrade, please contact Patrick Brandt or Jay Somerville.