ClockQualityClassType
The ClockQuality as specified in section 5.3.7, 7.6.2.4 and Table 5 of [1]. Value Description ------ ---------------------------------------------------------- 0 Reserved to enable compatibility with future versions. 1-5 Reserved 6 Shall designate a clock that is synchronized to a primary reference time source. The timescale distributed shall be PTP. A clockClass 6 clock shall not be a slave to another clock in the domain. 7 Shall designate a clock that has previously been designated as clockClass 6 but that has lost the ability to synchronize to a primary reference time source and is in holdover mode and within holdover specifications. The timescale distributed shall be PTP. A clockClass 7 clock shall not be a slave to another clock in the domain. 8 Reserved. 9-10 Reserved to enable compatibility with future versions. 11-12 Reserved. 13 Shall designate a clock that is synchronized to an application-specific source of time. The timescale distributed shall be ARB. A clockClass 13 clock shall not be a slave to another clock in the domain. 14 Shall designate a clock that has previously been designated as clockClass 13 but that has lost the ability to synchronize to an application-specific source of time and is in holdover mode and within holdover specifications. The timescale distributed shall be ARB. A clockClass 14 clock shall not be a slave to another clock in the domain. 15-51 Reserved. 52 Degradation alternative A for a clock of clockClass 7 that is not within holdover specification. A clock of clockClass 52 shall not be a slave to another clock in the domain. 53-57 Reserved. 58 Degradation alternative A for a clock of clockClass 14 that is not within holdover specification. A clock of clockClass 58 shall not be a slave to another clock in the domain. 59-67 Reserved. 68-122 For use by alternate PTP profiles. 123-127 Reserved. 128-132 Reserved. 133-170 For use by alternate PTP profiles. 171-186 Reserved. 187 Degradation alternative B for a clock of clockClass 7 that is not within holdover specification. A clock of clockClass 187 may be a slave to another clock in the domain. 188-192 Reserved. 193 Degradation alternative B for a clock of clockClass 14 that is not within holdover specification. A clock of clockClass 193 may be a slave to another clock in the domain. 194-215 Reserved. 216-232 For use by alternate PTP profiles. 233-247 Reserved. 248 Default. This clockClass shall be used if none of the other clockClass definitions apply. 249-250 Reserved. 251 Reserved for version 1 compatibility; see Clause 18. 252-254 Reserved. 255 Shall be the clockClass of a slave-only clock; see 9.2.2.