MESSAGE: In November of this year (2019), the State entered into a contract with Motorola to upgrade the AWIN system to APCO P25 Phase 2. Phase 2 makes more efficient use of the spectrum by using 2-slot, Time-division multiple access (TDMA), which provide additional operating capacity.
P25 Phase 2 (TDMA) is backwards compatible with Phase 1 products. However, it is important to know that after AWIN is upgraded in an area where Phase 1 (FDMA) subscribers are present on the system, the channel will default to the Phase 1 mode to maintain compatibility with these users. This will decrease the operating efficiency of the system.
The upgrade to AWIN is expected to be complete in late 2022. There is no requirement to replace Phase 1 radios, however, as agencies are replacing radios they must be Phase 2 compatible devices. Further, as of December 15, 2019 no additional Phase 1 (FDMA) radios will be enabled on AWIN. All radios enabled on the system from 12/15/19 forward must be Phase 2. New radios that are “Phase 2-capable” must have this capability enabled to be allowed on the AWIN system.
To have a radio model tested; have the manufacturer contact AWIN at:
If you have a radio that is not on the below list and is already in operation on AWIN, then it is considered to be “grandfathered in.” However, if that radio needs to be replaced or fails, any replacement radio must be P25 Phase 2 compliant.