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This addendum provides changes to TSB-31-C, Telecommunications – Telephone Terminal Equipment – Rationale and Measurement Guidelines for U.S. Network Protection. Clause 2 contains an addition to the Suggested Equipment List in subclause 5.5 of TSB-31-C. Clause 3 provides text and figures for completely replacing those found in Clause 15 of TSB-31-C. The other clauses in TSB-31-C are not affected. Words that appear in Underlined Italics in this addendum are intended as instructions to the reader.
