Agilent 81250 ParBERT SONET/SDH Frame Generator, November 2002 13
How the Frame Generator Works
The following sections provide detaile d 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 page20.

How Frames are Generated

The Frame Generator generates fram es 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
Administrat ive unit poi nter(s)
Section/RS overhead
Line/MS overhead
Transport Overhead Payload