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SONET_Usr.bk Page 76 Wednesday, December 13, 2000 11:11 AM
Selecting Test Features - SONET Operation
Using Receive Overhead Monitor
Using Receive Overhead Monitor
Description
When first connecting to a SONET network, a start up confidence check can be
made by viewing the behavior of all the overhead bytes. If the SONET network
shows alarm indications, some diagnosis of the problem may be gained from
viewing all the overhead bytes.The OVERHEAD MONITOR display is updated
once per second (once per 8000 frames) approximately.
TIP:
A snapshot of the received overhead can be logged to the chosen logging device.
See "Logging on Demand " page 146.
1 Set up the receive SONET interface and payload as required. See "Setting
HOW TO:
2 Choose the type of overhead to MONITOR.
3 If
76
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Receive Interface" page 70.
(Transport Overhead) is chosen, choose the STS-3 # and
TOH
STS-1# to be displayed.
Many bytes in
and
STS-1# 2
overhead functions have not yet been defined.
If
is chosen, the hexadecimal value of all 81 bytes of section
STS-1# 1,2,3
overhead is displayed (all 324 bytes of an OC-12 or 1,296 bytes of an OC-48 are
displayed 81 bytes at a time by selecting each STS-3 in turn).
If BYTE NAMES is chosen, the labels for the
displayed.
are unlabeled because the other
STS-1#3
STS-1# 1,2,3
overhead bytes are
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