scope:

This addendum provides changes to TIA-968-B, Telecommunications - Telephone Terminal Equipment - Technical Requirements for Connection of Terminal Equipment to the Telephone Network. Clause 2 provides an addition to the list of acronyms and abbreviations in sub-clause 3.2 of the standard and an additional informative reference for the bibliography in Annex C. Clause 3 removes the requirements for Type B ringing from Table 6 and from various subclauses of 5.1.11 (loop start interfaces) and 5.1.12 (ground start interfaces). Clause 4 adds a new sub-clause 5.3.10 with interface requirements for a class of DSL service known as Fast Access to Subscriber Terminals (FAST1). None of the other clauses in TIA-968-B are affected.

Where modifications are being made to existing text, additions to the text are shown underlined and deletions are shown using strikeout. Words that appear in underlined italics in this addendum are intended as instructions to the reader. Where those instructions make it clear that only new text is being added, underlining for the new text is omitted for ease of reading.