Clock source QL (quality level) is defined in ITU-T G.781
section 5.4 to reflect the synchronization quality within a
network Option, i.e. I, II, and III.
The following clock source quality levels are defined for the
synchronization process of Option I:
QL-PRC Primary reference clock
QL-SSU-A Type I or V slave clock defined in ITU-T G.811
QL-SSU-B Type VI slave clock defined in ITU-T G.812
QL-SEC Synchronous equipment clock
QL-DNU Do not use for synchronization
QL-INVx Unallocated SSM value,
where x represent the value of SSM received
QL-FAILED Signal failure state
QL-UNC Unconnected to an input
QL-NSUPP Not supporting the SSM processing
The following clock source quality levels are defined for the
synchronization process of Option II:
QL-PRS PRS traceable
QL-STU Synchronized; traceability unknown
QL-ST2 Stratum 2
QL-TNC Transit node clock
QL-ST3E Stratum 3E
QL-ST3 Stratum 3
QL-SMC SONET clock self timed
QL-ST4 Stratum 4 freerun
QL-PROV Provisionable by the network operator
QL-DUS Do not use for synchronization
QL-INVx Unallocated SSM value,
where x represent the value of SSM received
QL-FAILED Signal failure state
QL-UNC Unconnected to an input
QL-NSUPP Not supporting the SSM processing
The following clock source quality levels are defined for the
synchronization process of Option III:
QL-UNK Unknown clock source
QL-SEC Synchronous equipment clock
QL-INVx Unallocated SSM value,
where x represent the value of SSM received
QL-FAILED Signal failure state
QL-UNC Unconnected to an input
QL-NSUPP Not supporting the SSM processing
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INTEGER |
netsyncQualityLevelNULL(1), netsyncQualityLevelDNU(2), netsyncQualityLevelDUS(3), netsyncQualityLevelFAILED(4), netsyncQualityLevelINV0(5), netsyncQualityLevelINV1(6), netsyncQualityLevelINV2(7), netsyncQualityLevelINV3(8), netsyncQualityLevelINV4(9), netsyncQualityLevelINV5(10), netsyncQualityLevelINV6(11), netsyncQualityLevelINV7(12), netsyncQualityLevelINV8(13), netsyncQualityLevelINV9(14), netsyncQualityLevelINV10(15), netsyncQualityLevelINV11(16), netsyncQualityLevelINV12(17), netsyncQualityLevelINV13(18), netsyncQualityLevelINV14(19), netsyncQualityLevelINV15(20), netsyncQualityLevelNSUPP(21), netsyncQualityLevelPRC(22), netsyncQualityLevelPROV(23), netsyncQualityLevelPRS(24), netsyncQualityLevelSEC(25), netsyncQualityLevelSMC(26), netsyncQualityLevelSSUA(27), netsyncQualityLevelSSUB(28), netsyncQualityLevelST2(29), netsyncQualityLevelST3(30), netsyncQualityLevelST3E(31), netsyncQualityLevelST4(32), netsyncQualityLevelSTU(33), netsyncQualityLevelTNC(34), netsyncQualityLevelUNC(35), netsyncQualityLevelUNK(36) |
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