Lucent Technologies FT-2000 OC-48 - Page 1546

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A SONET Overview
A-14 Issue 8.0 July 2002
Figure A-7. STS-1 Synchronous Payload Envelope in Interior of
STS-1 Frame
9 Rows
9 Rows
3 Columns
87 Columns
STS-1 SPE
at any byte boundary)
(SPE can start
STS-1 Frame Format
Start of STS-1 SPE
info
Pointer
STS-1 POH
90 Columns
Transport Overhead
info
Pointer
s125
STS-1 Synchronous Payload Envelope
s125