XRT75R06D Datasheet, PDF (88/105 Pages) Exar Corporation – SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

XRT75R06D
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REV. 1.0.0
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
Telcordia GR-253-CORE defines an "87-3 Cancel" Pointer Adjustment, as the "87-3 Continuous" Pointer
Adjustment pattern, with an additional pointer adjustment cancelled (or not executed), as shown above in
Figure 62.
Telcordia GR-253-CORE mandates that the Intrinsic Jitter, within the DS3 signal that is de-mapped from a
SONET signal, which is experiencing the "87-3 Cancel" pattern of Pointer Adjustments, must not exceed
1.3UI-pp.
8.5.8 Continuous Pattern
Figure 63 presents an illustration of the "Continuous" Pointer Adjustment Scenario per Telcordia GR-253-
CORE.
FIGURE 63. ILLUSTRATION OF CONTINUOUS PERIODIC POINTER ADJUSTMENT SCENARIO
Repeating Continuous Pattern (see below)
Pointer Adjustment Events
Initialization
Measurement Period
T
Telcordia GR-253-CORE mandates that the Intrinsic Jitter, within the DS3 signal that is de-mapped from a
SONET signal, which is experiencing the "Continuous" pattern of Pointer Adjustments, must not exceed 1.0UI-
pp. The spacing between individual pointer adjustments (within this scenario) can range from 7.5ms to 10s.
8.5.9 Continuous Add
Figure 64 presents an illustration of the "Continuous Add Pattern" Pointer Adjustment Scenario per Telcordia
GR-253-CORE.
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