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SONET_Usr.bk Page 74 Wednesday, December 13, 2000 11:11 AM
Selecting Test Features - SONET Operation
Using Transmit Overhead Setup
Using Transmit Overhead Setup
Description
You can set an overhead byte to a known static state to aid troubleshooting, for
example to quickly check for "stuck bits" in path overhead bytes. Transport
Overhead, Path Overhead, Trace Messages and Labels can be set using this feature.
1 Set up the SONET transmit interface and payload required. See "Setting
HOW TO:
2 Choose the type of overhead to SETUP.
74
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Transmit Interface " page 60.
If OC-12 or OC-48 is chosen as the SONET interface, choose the STS-3# and
STS-1# you wish to set up.
If OC-3 is chosen as the SONET interface, choose the STS-1# you wish to set up.
DEFAULT - Use to set all overhead bytes to the standard values defined by
BELLCORE/ANSI.
If a test function is active then the overhead byte value is determined by the
choices made in the Test Function. If APS Messages is chosen, for example,
K1K2 value is set by the APS Messages setup.
If
(Transport Overhead) is chosen, choose the STS-1 to be displayed.
TOH
Many bytes in
and
STS-1# 2
functions have not yet been defined.
If
is chosen, the hexadecimal value of all 81 bytes of the STS-3
STS-1# 1,2,3
section & line overhead selected are 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-
are unlabeled as the other overhead
STS-1#3
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