SCHAUMBURG, Ill.-Motorola Inc. said it proposed unified Time Division Multiple Access technology guidelines that would allow interoperability and easier migration between TDMA technology and the Frequency Division Multiple Access technology already approved for Project 25 Phase II two-way radio standards.
Motorola’s guidelines for the TDMA alternative include requirements to use the existing vocoder approved for Project 25 FDMA, to use the Project 25 operating codes for infrastructure command functionality and to use Project 25 subscriber ID coding, said Motorola.
Phase II of the FDMA standard was designed to build on existing objectives of Phase I for interoperability and migratability, and to increase spectrum efficiency.
