sonet 101

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What is SONET? STS-1 51.84 Mbps STS-n OC-n Service Adapters (map to VTs) DS-1 — (28 max per STS-1) 1 Electrical to Optical Converter Service Adapters (map to STS-1) Mux (Byte Interleave Synchronous Mux) E/0 DS-3 — (1 max per STS-1) STS-n 6 Future Service Examples: • Video • FDDI • Broadband ISDN • ATM • MPE6-2 Service Adapters STS–Nc (concatenated STS-1s) Timing Rate = n x 51.84 Mbps VT: Virtual Tributary STS: Synchronous Transport Signal OC: Optical Carrier Figure 1-2 • SONET Multiplexing
What is SONET? TRANSPORT FOR BROADBAND ISDN Currently many separate networks provide the communication services available to subscribers. Plain old telephone service (POTS) is provided over a voice channel connected to a circuit-switched network. A totally independent packetswitched network might be used for data communication, offering faster methods for data delivery. An Integrated Services Digital Network (ISDN) provides a single network that can handle voice, data, and video. Whereas ISDN has traditionally applied to the narrowband telephony world, a broadband ISDN network consists of broadband ISDN switches and terminals (Figure 1-4) which can tie high-speed local area networks (LANs), digital TV and other video services, data communication devices, telemetry equipment (for example automatic electrical meter reading), and voice into one digital network. SONET provides the necessary bandwidth to transport information from one BISDN switch (or terminal) to another. For example, an OC-3 (155 Mbps) rate may be used to transport an H4 digital broadband channel carrying a broadcast quality TV signal. Broadband ISDN will use asynchronous transfer mode (ATM) technology (see also the section: New Services Using ATM). 7 In the future, public and private networks will be based on ATM/cell-relay technology. ATM is the CCITT standard that supports cell-based voice, data, video, and multimedia communication in a public network under Broadband ISDN. SONET provides sufficient payload flexibility that it will be used as the underlying transport layer for BISDN ATM cells. The ATM Forum is aligning with SONET as the transport layer for cell-based traffic. SONET <strong>101</strong>
Page 1: HDSL About • IXC • BISDN • CC
Page 4 and 5: What is SONET? Figure 1-1 • SONET
Page 8 and 9: What is SONET? Figure 1-3 • ISDN
Page 10 and 11: What is SONET? Transport Overhead S
Page 12 and 13: What is SONET? Path Terminating Equ
Page 14 and 15: What is SONET? VT payloads and VT p
Page 16 and 17: What is SONET? STS Path Overhead Fi
Page 18 and 19: What is SONET? Frame 1 STS-1 Pointe
Page 20 and 21: What is SONET? SONET NETWORK ELEMEN
Page 22 and 23: What is SONET? Broadband Digital Cr
Page 24 and 25: Why Synchronize? SYNCHRONIZATION HI
Page 26 and 27: Why Synchronize? External Reference
Page 28 and 29: What are the Benefits of SONET? Nod
Page 30 and 31: What are the Benefits of SONET? GRO
Page 32 and 33: What are the Benefits of SONET? DSX
Page 34 and 35: What are the Benefits of SONET? NEW
Page 36 and 37: What are the Benefits of SONET? OPT
Page 38 and 39: SONET OAM&P FOTS A FOTS DSX or Digi
Page 40 and 41: SONET OAM&P Interexchange Carrier N
Page 42 and 43: SONET OAM&P TELECOMMUNICATIONS MANA
Page 45 and 46: 5 HDSL SONET • IXC • BISDN •
Page 47 and 48: SONET Networking Switching Node DSX
Page 49 and 50: SONET Networking Enhanced Survivabi
Page 51 and 52: SONET Networking Local Inter-Node D
Page 53 and 54: SONET Networking OC-n OC-n City A C
Page 55 and 56: SONET Networking HUB — Switching
Page 57:
SONET Networking Hub Application Un
Page 60 and 61:
Synchronous Digital Hierarchy Conve
Page 62 and 63:
Contributions to SONET Working in c
Page 64 and 65:
List of Terms CEPT—European Confe
Page 66 and 67:
List of Terms Packet Switching—An
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sonet 101

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