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Agilent 81250 ParBERT SONET/SDH Frame Generator, November 2002 13
How the Frame Generator Works
The following sections provide detailed specifications of the following:
• How the Frame Generator generates frames
This is described in the following section.
• Coded Mark Inversion (CMI) coding
See “CMI Coding” on page 20.
• Synchronizing pattern
See “Synchronizing Pattern” on page 20.
How Frames are Generated
The Frame Generator generates frames based on the settings made in
the GUI. The following figure shows the different components of a
frame.
Figure 4 SONET Frame Structure
Path Overhead
Administrative unit pointer(s)
Section/RS overhead
Line/MS overhead
Transport Overhead Payload