...
In terms of performance, the G.8266 clock is mostly similar to the G.812 clock originally defined for the SDH network back in the 1990s. This was termed the “SSU clock” (Synchronisation Supply Unit), and is equivalent to the N. American Stratum 2 clock.
The wander generation, tolerance and transfer specifications are all identical to that of the G.812 clock, except that the output is PTP instead of a 2048 kbit/s signal.
...
Maintain the clock within prescribed performance limits
(although these limits have never been defined, so there is no requirement to meet)Not cause any alarms.
Not switch reference.
Not go into hold-over
As stated above, the wander tolerance and transfer requirements of G.8266 follow those defined in G.812.
G.812 defines the tolerance limit in three ways: as an MTIE mask (clause 9.1.1), as a TDEV mask (clause 9.1.2), and a sinusoidal wander tolerance (clause 9.1.3). The sinusoidal wander tolerance mask in Table 13 and Figure 5 is computed from the MTIE mask defined in clause 9.1.1, and shows the relationship between wander frequencies and amplitudes required in order to meet the MTIE mask. It can be used in place of the TDEV wander tolerance discussed in clause 9.1.2.
...