CommLT why would OCC dispatch assign it when it is used for mutual aid. Can you give US an example how the channel will be used? I am a little confused....
There is no sole purpose for that channel (OC Access) it has changed a little over the years from being an administrative channel for county-wide use that included animal control, sig-alerts, and other miscellaneous uses.
Since it is a county-wide repeated VHF channel and was already in existence it started being used for interoperability once that became a big issue post 9/11. The primary uses at that time were for other agencies using VHF which has primarily have been USFS and Cal Fire while responding with OCFA.
Although allowable, OCFA is not a licensed user for that frequency, the County of Orange is. That being the case OCFA has to ask OCC for permission to use it when the need arises.
A practical daily use is a traffic accident at the county line on Ortega highway. OCFA will dispatch the responding units on 800 MHz. At the same time USFS dispatches their units on Forest Net. Once approval is obtained responding units are advised and OCC activates a cross patch and ties 800MHz and Forest Net together using OC Access. Although this is now routine and fairly seamless their is still a delay and the other users are still using OC Access (sig-alerts as an example).
When Fire OC goes online since it will be licensed to OCFA the initial dispatch can occur on the frequency for their and the other responding agencies.
I know this sounds like no big deal, and it shouldn't be, but it causes a lot of confusion for responding units and it will be nice that if you have an onsite emergency (incident within an incident) that you can call for help and not wait for a sig-alert traffic bulletin to finish.
I hope I answered your question. If not feel free to ask clarifying questions.
Timothy McGowen