XRT75L06D Datasheet, PDF (85/103 Pages) Exar Corporation – SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER

XRT75L06D
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SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT WITH SONET DESYNCHRONIZER
REV. 1.0.4
FIGURE 60. ILLUSTRATION OF THE 87-3 ADD POINTER ADJUSTMENT PATTERN
Added Pointer Adjustment
43 Pointer Adjustments
43 Pointer Adjustments
No Pointer
Adjustments
T
t
Telcordia GR-253-CORE defines an "87-3 Add" Pointer Adjustment, as the "87-3 Continuous" Pointer
Adjustment pattern, with an additional pointer adjustment inserted, as shown above in Figure 60.
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 Add" pattern of Pointer Adjustments, must not exceed 1.3UI-
pp.
7.5.7 87-3 Cancel
Figure 61 presents an illustration of the 87-3 Cancel Pattern Pointer Adjustment Scenario per Telcordia GR-
253-CORE.
FIGURE 61. ILLUSTRATION OF 87-3 CANCEL POINTER ADJUSTMENT SCENARIO
86 or 87 Pointer Adjustments
No Pointer
Adjustments
T
Cancelled
Pointer Adjustment
81