March 2004
Intermediate to advanced
840 pages
21h 45m
English
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Ethernet over SONET/SDH
MSPPs use SPRs or RPRs to carry Ethernet data services over SONET/SDH. SPRs are built by concatenating SONET STS-1s or SDH VC-3s. For example, an OC-48 UPSR SONET ring has 48 protected STS-1s. Out of these 48 STS-1s, 12 of them could be concatenated to form an SPR-12 that would interconnect the 802.1D bridges on the MSPP nodes to each other. The remaining 36 STS-1s are free to be used for TDM traffic or for creating other SPRs. RPR technology uses a new Layer 2 protocol for the MAN and WAN and combines the advantages of both SONET/SDH and Ethernet.
Ethernet over SONET/SDH Encapsulation
There are three types of Ethernet over SONET/SDH encapsulations:
Ethernet over SONET/SDH using ANSI T1X1.5 147R1 Generic Framing Procedure ...
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