CFR›Title 47›Chapter I›Part 36›Subpart B›Subject Group Central Office Equipment ContainsSections 36.121–36.126CorpusDaily eCFRDisplayed edition2026-07-13Last updated2026-07-13 Sections 36.121 § 36.121 General. 36.122 § 36.122 Categories and apportionment procedures. 36.123 § 36.123 Operator systems equipment—Category 1. 36.124 § 36.124 Tandem switching equipment—Category 2. 36.125 § 36.125 Local switching equipment—Category 3. 36.126 § 36.126 Circuit equipment—Category 4. Previous Cable and Wire Facilities Cable and Wire Facilities Next Equal Access Equipment Equal Access Equipment