Site Trunking Event – 05/04/20

At approximately 13:35 today, the COIRS system went into an unscheduled Site Trunking condition. The cause was electrical work taking place at the system master site that tripped a breaker unexpectedly. The power was restored and the system returned to normal at approximately 13:40.
Site Trunking worked as designed and there was no interruption of service to subscribers. Dispatchers utilized back up radios during the event.

Site Off Line – Huntley Road

XO Communications is reporting a line down condition for the circuit that serves the Huntley Road tower site location. Users in that area will experience diminished in-building coverage during this outage.

Once repairs are complete, a full service message will be posted.

System Outage Event

Today at 09:44, the COIRS radio system experienced a 5 minute outage after a core switch at the Avery Road prime site experienced and automated, unexpected reboot.

B&C Communications has been notified and is investigating why the system went off the air and not into site trunking. As of 09:49, the system was back in service.

System Upgrade

COIRS System Users:

As part of our ongoing system maintenance program, Motorola will be performing an upgrade to the COIRS radio system starting Monday, March 18th . This first week of the upgrade will involve the tower sites and connectivity and be mostly transparent to the users. However, we are expecting to experience at least four “site trunking” events.  These are scheduled for the following days/times:

  • Monday, 3/18 at 10:20
  • Tuesday, 3/19 at 08:40, 13:20 and 17:20

Each event will last approximately 10 minutes. Users will receive a “SITE TRUNKING” notification on their display, but talk-groups should continue to function normally and all sites will remain functional with no expected change in coverage. Dispatch consoles will lose connectivity and dispatchers will need to be prepared to use back up radios during these events.

As with any upgrade, the schedule can fluctuate.  NRECC and/or DELCOMM will announce over the radio, including LAW MUTUAL  before each event.

CS Lauren Yankanin will be the point person during the first week of the upgrade should there be any problems. You may contact her or Director Patrick Brandt of DelComm with any problems or concerns.

During the week of March 25th, Motorola will be visiting each of the dispatch centers to perform upgrades to the MCC7500 consoles. This will cause approximately 45 minutes of down time at each position. A specific schedule for change outs is being drafted and will be shared with you when it is ready.

Maintenance Alert: Upper Arlington

Tonight (12/28/18), starting at 1900, the City of Upper Arlington will be doing maintenance on the fiber optic network that connects the COIRS radio tower located at Station 72. This maintenance will take that site off line. The outage could last up to 8 hours and will degrade in-building walkie coverage in and around UA, especially south of Lane Ave.

UAPD and UAFD will remain on their normal COIRS talk-groups and will only move to COIRS LE or COIRS FD if the need arises. For any in building fire responses, it will be the discretion of the IC whether to move the response to COIRS FD.

All other COIRS towers will remain in service during this maintenance.

If you have any questions, please contact Jay Somerville.

XO Communications has notified COIRS that they will be performing  network upgrades on the circuits that support our radio system on Saturday 06/16 between 00:01 and 06:00 and on Monday 06/18 between 00:01 and 06:00. There could be connectivity interruptions of up to 20 minutes during this time frame that will cause the system to go into site trunking.

Dispatchers will need to be ready to use back up radios/walkies during this outage. Although the consoles may remain connected, they will not be usable on COIRS talk-groups during site trunking & walkies must be used.

Field units will receive the “SITE TRUNKING” notice on their radios, but can continue to operate on their normal talk-groups. System roaming will be turned off during this time so that units won’t get separated onto the Delaware side of the system. Delaware County users will not be affected during this outage.

If you have any questions/concerns about the outages, please contact Jay Somerville or Patrick Brandt.

Upper Arlington Tower Off-Line

At approximately 18:25 today, contractors working on the fiber segment in Upper Arlington interrupted connectivity to the UA tower site. UA Information Technology is working with the contractor to investigate the interruption and restore the connection. Responders operating in the Upper Arlington area will experience decreased in-building coverage. Updates will be posted as they are received. There is currently no ETA.

For any questions, please contact Jay Somerville or the NRECC supervisor.