"This Bulletin identifies the tests that Trunking equipment is expected to pass in order for a manufacturer to declare P25 Compliance in the area of Trunking ISSI for Voice and Mobility Services. These tests were deemed necessary by the industry and user members participating in the work of the ISSI TG and TR8.25. The ISSITG includes TIA members and representatives of Federal@ State and Local Public Safety agencies and organizations. This group@ being familiar with the relevant published standards@ available P25 equipment and test equipment and the general intentions of P25 Compliance Assessment@ reviewed all trunking ISSI interoperability tests described in reference [1]. P25 Compliance Assessment confirms that the equipment of different manufacturers will interoperate with respect to the P25 defined features@ services and interfaces. In determining the tests appropriate for P25 Compliance Assessment testing in this area@ the group considered whether tests in reference [1] were important for achieving interoperability between equipment of different manufacturers versus tests important for product design and certification. In general@ tests that were determined to be more oriented towards product design and certification were deemed unnecessary for inclusion in this list. As explained previously@ the ""product certification"" referred to here is a manufacturer-specific process@ part of the product development process@ and does not imply formal certification by any entity such as TIA@ the FCC@ etc. The resulting list therefore represents tests that are most important for or most likely to impact interoperability between manufacturers building to the same set of published standard documents."