This system became active in June 2017, testing began in July-Sept. 2017. A scanner that will handle P25 Phase II is needed in order to listen to this system. Limited use of encryption has been noted. As of November 2017, some talk groups are patched between the two systems and it has been reported that the audio is degraded when one user is on UHF-T and the other is utilizing the "new" P25 system. This system will replace the legacy UHF-T system.
As of 12-6-17, Universal Security Inc. (U.S.I.)is now using the new radios and on the P25/Phase 2 part of the system. This is a private security company which supplements the Department of Aviation Security(Police). Previously was patched via the UHF-T legacy radios. Currently only Traffic Management Authority (T.M.A.'s) and Chicago Fire Dept. are using the UHF-T system via the patch. Unknown on the migration date. Their are still some older radios being used sporadically, majority of the users are using the P25/Phase 2 system. You can tell by the audio quality, which sounds like they're under water, and no Individual Radio/Unit ID is detected.**
2-1-18 Update: T.M.A.'s (Traffic Management Authority) personnel have been issued the new Phase 2/800 Mhz. portables as of today. Still hearing some sporadic use of older "legacy" UHF-T radios via the patch. The T.M.A. Supervisors are using portables that have access to Security and CPD talk groups and are listed below in the "2702000 series", and Traffic Management personnel are using radios in the "5000 series" (2705000 series). I don't believe they have access to any channels other than Traffic Management (Talk Group 27016).*****