2024 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2023 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2022 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2021 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2020 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2019 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2016 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2015 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2014 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2010 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment

2009 7 CFR 1755.522 – RUS general specification for digital, stored program controlled central office equipment