Amendment 1 to Recommendation ITU-T G.8260 (2012): " Modifies definition 3.1.8, "packet-based method with timing support from the network" " Adds a number of definitions in Clause 3.1 " Adds new sub-clause I.5.1 to Appendix I, describing the determination of floor delay and discussion of the impact of re-route events " Adds new sub-clause I.5.2 to Appendix I, describing the impact of exceptional events on packet network limit