47 CFR § 36.122 - Categories and apportionment procedures.

§ 36.122 Categories and apportionment procedures.

(a) The following categories of central office equipment and apportionment procedures therefore are set forth in §§ 36.123 through 36.126.

Operator Systems Equipment Category 1.
Tandem Switching Equipment Category 2.
Local Switching Equipment Category 3.
Circuit Equipment Category 4.