responded, not the fire ones. Member Herron believed there had to be a sunset on FDMA.
Member Johl said he understood that was the reason to go to this system but every fire main
dispatch group is patched through a VHF channel. Member Baarman said it is all the ops
channels, that if a radio is affiliated, it downgrades the call. Member Johl said that is why it
should be left up to the ETSB to determine if a radio downgrades a channel then it would not be
allowed on the system. Member Baarman said we have that today. All the police are TDMA
capable, but when fire listens in, it downgrades the call. Member Baarman said the last report
they had run showed only 25% of calls were TDMA, which is not many if all police are TDMA.
Member Johl said there are radios on the DuPage system that are not TDMA capable and that is
what we are trying to get away from with the new radio purchase, but they are not on the street,
or in the vehicles yet. He reiterated that radios outside of the system, radios built into buildings,
or cache radios are not transmitting every day and not downgrading the system, should be
determined by ETSB whether to allow them to be in operation. Member Herron clarified with
Member Baarman who said, if the radios affiliate to the talk group, as soon as that radio is on an
ops channel, it pushes the channel to FDMA. Member Baarman confirmed saying, it just takes
one radio. Member Herron said to Member Johl, that is just listening, that is not transmitting.
Member Herron said law enforcement will be utilizing AES, fire will not, but fire will have it on
the new radios, so any legacy radio that does not have that capability will not be able to listen.
Member Baarman said he would like to see a goal to get to TDMA, that maybe the language in
the policy is too strong, but there needs to be a plan to address those radios of concern. He said
from a PSAP perspective, the more talk groups he can get to TDMA, the less busies they
experience. He said, ultimately, that is the goal they are looking for. He said VHF is patched,
they are not concerned about the dispatch channels, those will remain FDMA. But if users are
using the ops channels instead of the firegrounds, more traffic will be brought in more frequently
which can cause more busies.
A brief discussion ensued around older model radios and whether flashcodes are available, how
many legacy/cache radios are on the system and whether agencies budgeted to replace the legacy
radios on system, of which Member Johl said there are at least twenty mobiles on the ACDC side
and an unknown number of portables. Member Johl said there is still useful life on the 7000XEs
and if they only get VHF channels and are not on STARCOM channels because they would
degrade the TDMA capable STARCOM radio channel, okay.
Mr. Theusch said the intent of the ETSB with this radio project was to end of life all the
APX7000s. As the agencies were coming in, legacy equipment was talked about, some agencies
said they had models to upgrade and ETSB ordered or took notes to order the necessary flashkits.
He said if there is a need for flashkits to upgrade the mobile APX7500s, that can be done. He
recalled conversations with agencies who wanted to keep their 7000XEs for VHF purposes only,
but not to transition once the radios were rolled out. Member Johl agreed that he does not want
to degrade the system, but there needs to be language to allow use of these radios when users ask,
at the discretion of the ETSB, even if that means they are told what channels they can be on just
so they can still be used.
Member Herron said, being a short-timer, he would want to know which of his budget cycles this
would affect rather than have ETSB tell him. He thought that should be a goal for 2025, or
whatever, for everything to be TDMA enabled. Member Herron said nothing against ETSB, but
if they arbitrarily throw out July 1, 2023 as the date, that is not fair because then agencies are