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Selecting Test Features - SONET Operation
Adding Pointer Adjustments
N O T E
For SPE pointers the sequence interval is selectable from 7.5 ms, 10, 20, 30, 34 ms;
40 to 100 ms in 10 ms steps, 100 to 1000 ms in 100 ms steps, 1, 2, 5, 10 seconds.
For VT pointers the sequence interval is selectable from: 200 ms, 500 ms, 1, 2, 5 and
10 seconds.
For SPE pointers the minimum spacing between adjustments is 500 us.
For VT pointers the minimum spacing between adjustments is 2 ms.
T1.105 A5 PERIODIC
CANCEL (Continuous
Pattern)
GR-253 5-34(d)
Periodic Single adjustments, with selectable polarity and cancelled adjustment
(1 less). The time interval between pointer adjustments can be set (see Note 1).
Cancelled adjustments occur every 30 seconds or every repeat of the 87-3
pattern, whichever is longer.
GR-253 5-32(d)
PERIODIC CANCEL
(26-1 pattern)
This selection is only available if you have selected VT1.5 mapping. The
sequence pattern is 26 pointer movements followed by 1 missing pointer
movement. The cancelled adjustment is the 26th pointer adjustment, that is the
one before the regular gap of 1. Pointer polarity is selectable and the time
interval between pointer adjustments programmable to 200 ms, 500 ms, 1 s, 2
s, 5 s or 10s. Cancelled adjustments occur every 30 seconds or every repeat of
the 26-1 pattern, whichever is longer.
Pointer Sequence
Description
Pointer Sequences Available with Selected Mapping
POINTER SEQUENCE
MAPPING
SPE
VT6, VT2
VT1.5
A1 SINGLE
√
√
√
A2 BURST OF 3
√
√
√
A3 PHASE TRANSIENT
√
√
√
A4 PERIODIC NORMAL(87-3)
√
A4 PERIODIC NORMAL
(Continuous)
√
√
√
PERIODIC NORMAL (26-1)
√
SONET_Usr.bk Page 92 Wednesday, December 13, 2000 11:11 AM
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