Basic HTML version of Foils prepared Dec. 6 98

Foil 52 SMDS - Switched Multi-megabit Data Services (2)

From Introduction to Network WANs Lectures at Xi'an Jaotong University -- Sept 1998. by Roman Markowski
Media: SONET, DS-3, DS-1
Topology: physically star configured network with dual bus design
Limitations: up to 512 nodes on the bus;bus length: up to 160 km
Connection to SMDS network:
  • LAN---Bridge/Router---CSU---(T1/T3)---SMDS network
Main competitors: Frame Relay and ATM
OSI Reference Model
  • SMDS service defines 3 layers (SIPs = SMDS Interface Protocols)
  • physical, data link and network layers
SMDS is compatible with:
  • IEEE 802.6 Metropolitan Area Network, and Broadband ISDN
  • DQDB - Distributed Queue Dual Bus ; used as the interface and access method for the network

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