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Selecting Test Features
Using Transmit Overhead Setup
Description You can set an overhead byte to a known static state to aid in
troubleshooting, for example, to quickly check for "stuck bits" in path
overhead bytes. Transport Overhead, Path Overhead and Trace
Messages can be set using this feature.
HOW TO: 1 Set up the SONET transmit interface and payload required.
2 Choose the type of overhead to SETUP.
If STS-12 is chosen as the SONET interface, choose the STS-3#, STS-
1# TOH you wish to set up. If STS-3 is chosen as the interface select
the STS-1# TOH.
If TRACE MESSAGES is chosen, see "Setting Overhead Trace
Messages " page 32.
DEFAULT - Use to set all overhead bytes to the standard values
defined by ITU-T. If a test function is active then the overhead byte
value is determined by the choices made in the Test Function. For
example if APS Messages is chosen, the K1K2 value is determined by
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