e peak-to-peak pktSelected2wayTE network limit (1100 ns from clause 7.3.1.1 in G.8271.2) applied as an input (it is only defined for option 1 networks). This is the maximum limit allowed at the end of a chain of clocks, SO a clock must be able to tolerate it as input. For the 1PPS input, the limit is defined by a max|TE| of 100 ns, which is the max|TE| that can occur at the output of a PRTC. When the DUT has an embedded PRTC, this 1PPS case is not applicable because there might not be a 1PPS port to give an input. In addition, a T-TSC-A must maintain the max|TEL| (0.1-Hz LPF) at its 1PPS output no greater than 1350 ns (only in the case where the T-TSC-A is external to the end application). This value is 250 ns more than the normal 1100 ns because the usual 400 ns of TE (where the T-TSC is embedded in the end application) is split into two: 250 ns for the holdover in the T-TSC-A and 150 ns for TE in the final application. So, the 1350-ns limit applies at the output of the T-TSC- A going into the end application (presumably with a 1PPS signal). Characteristics of the transfer of phase/time noise through the clock: G.8273.4 defines only one type of noise transfer, the 1PPS input to PTP output or 1PPS to 1PPS noise transfer. As in the T-BC/T-TSC case, the criteria to pass is that the phase gain of the DUT should be smaller than 0.1 dB. Transient response (response in the PTP/1PPS output during an interruption in the 1PPS input): This test involves a loss of the local 1PPS time signal, and then a subsequent return of the signal, all while monitoring the response at the output. The transient response needs to be less than 22 ns MTIE during the loss and again less than 22 ns MTIE following restoration. During the loss, it shall meet the holdover requirement defined in the next test case. Holdover, or long-term transient: Measures the phase error under two conditions for the as- sisted clocks. One is when the local time input (1PPS) has been removed and the remote PTP signal is still available, and the second is where bo