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Operating Basics: User Interface
OTS9100 User Manual 2-33
J0 Multi-Byte Trace
J0 Trace provides a capability to uniquely identify each of the multiple channels being carried in
a Dense Wave Division Multiplexer (DWDM) system, providing an end-to-end continuity check.
Since only the SONET framing byte plus J0 are in the unscrambled overhead of the SONET
signal, it is possible to extract for display the J0 trace to confirm channel ID.
The OTS9100 has the ability to generate unique J0 traces. This allows test signals to be easily
identified, or to simulate network-element generated traffic without the Trace Identifier
Mismatch (TIM) alarm being generated. The OTS9100 capability to display the received J0 trace
allows users to verify continuity and correct routing of individual channels within the multi-
channel DWDM system.
Figure 2-14: Transmitter J0 Trace dialog box
To edit, click on the Edit J0 Trace button. A dialog box is displayed, as shown in Figure 2-14,
reflecting the current settings of the J0 Trace. Click the appropriate radio button to choose
between No Trace, 16 Byte Trace, and 64 Byte Trace. To input a Trace Value, click in the Trace
Value box and start typing. When edits are complete, click OK to return to the main menu. In
16-byte, the last byte is filled with CRC. In 64-byte, the last two bytes are filled with CR LF.