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SONET_Usr.bk Page 75 Wednesday, December 13, 2000 11:11 AM
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Selecting Test Features - SONET Operation
Using Transmit Overhead Setup
3 in turn). The value of the bytes can be set using
INCREASE DIGIT
If BYTE NAMES is chosen, the labels for the
displayed.
3 If POH (Path Overhead) is chosen, choose the TYPE of overhead within STS-1
under test to be setup.
J1 and J2 bytes can be set under Path Overhead or Trace Messages. H4 byte has
a choice of sequences for VT-2, VT-1.5 and VT-6 mapping:
Full Sequence - 48 byte binary sequence.
Reduced Sequence - Binary count sequence of 0 to 3 i.e. 111111(00 to 11).
COC1 Sequence - Binary count sequence of 0 to 3 i.e. 110000(00 to 11).
4 If TRACE MESSAGES is chosen, see "Setting Overhead Trace Messages "
page 78.
Any bit of an overhead byte which is displayed as x or s cannot be set at any time.
All other bits can be set to 0 or 1.
You can set all overhead bytes to the default state by selecting SETUP
You can set all overhead bytes and test functions to the default state by recalling
Stored Settings [0] on the
OTHER
DECREASE DIGIT
.
STS-1# 1,2,3
display.
overhead bytes are
.
DEFAULT
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