sonet 101

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SONET Networking THE TRADITIONAL NETWORK Figures 5-1 and 5-2 illustrate the way a traditional network appears. Traditional networks can be divided into two main areas—access and inter-node. The inter-node network consists of trunks used to interconnect service-provider nodes or to connect those nodes with inter-exchange carrier locations. Fiber routes consist of point-to-point systems with cross-connections at the DSX-3 panel. The fiber system is symmetrical with one terminal end of the system a mirror image of the other. DS-3s enter at one end, leave at the other, and occasionally may be accessed at intermediate drop/insert sites. Current deployments are SONET fiber terminals configured as point-to-point, ring, or 1:n systems. 46 The access network (local loop) is mostly composed of twisted copper pairs connecting a switch to a telephone or other terminating equipment. In some areas, T1 lines or fiber are used to connect a switch to a remote (digital loop carrier) terminal (such as the Northern Telecom DMS-1 URBAN). The digital loop carrier (DLC) terminal in turn connects copper pairs to the individual users in a carrier serving area (CSA). SONET next-generation digital loop carriers (NGDLCs), such as Northern Telecom’s S/DMS AccessNode, are being deployed today. NGDLCs combine the access functionality available from DS-0s with SONET transmission capabilities from DS-1 through OC-n. The transport network is evolving towards a multi-point architecture and SONET enables new configurations to support this evolution. SONET add/drop multiplex and hub configurations can provide efficient traffic management capabilities, both in the inter-node and access environments.
SONET Networking Switching Node DSX-3 Cross-Connect To Users Switching Node Drop-and-Insert Switch Switching Node Switching Node Interexchange Carrier (IEC) Switching Node Switching Node 47 Inter-Node Network Access Network Figure 5-1 • Traditional Inter-Node Network SONET <strong>101</strong>
Page 1: HDSL About • IXC • BISDN • CC
Page 4 and 5: What is SONET? Figure 1-1 • SONET
Page 6 and 7: What is SONET? STS-1 51.84 Mbps STS
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: 5 HDSL SONET • IXC • BISDN •
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

sonet 101

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