N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 5 - SONET, WDM, DWDM and B-ISDN Technologies                                                             Slide 37 of 76 _________________                                                                                  __________

                                               STS-1 Structure

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STS-1 frame carries 9X90 8 bit bytes at 51.840 M bps. The breakdown of the STS frame is as follows:

Transport Over Head (TOH) - 1.728 M bps

Path Over Head (POH) - 0.576 M bps

User Information Payload - 49.536 M bps