HP OMNIBER 718 HP 37718A - Manual (Page 34)

24
Selecting Test Features
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 110.
HOW TO: 1 Set up the receive SONET interface and payload as required. See
“Setting SONET Receive Interface” page 17.
2 Choose the type of overhead to MONITOR.
3 If (Transport Overhead) is chosen, choose the STS-3 # and
STS-1# to be displayed.
Many bytes in
and are unlabeled because the other
overhead functions have not yet been defined.
If
is chosen, the hexadecimal value of all 81 bytes of
section 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).The value of the bytes can be set using
.
TOH
STS-1# 2 STS-1#3
STS-1# 1,2,3
DECREASE DIGIT
INCREASE DIGIT