See STP (Spanning Tree
Protocol)
SPE (Synchronous Payload
Envelope), relationship to
SONET, 300??“302
Squire, Matt, 131
S-tag, relationship to bridges, 384
standardized services, and hybrid
fiber-coax, 156
Standardized services attribute
and CESoE (Circuit Emulation
Service over Ethernet),
77??“81
implementation support for,
81??“82
requirements for, 76
role in Carrier Ethernet, 50??“51
standards bodies, Ethernet focuses
of, 56
star topology, RPR in, 362??“363
statistical multiplexing
availability of, 276
relationship to packetized data
services, 155
Steer protection mechanism, role in
RPR, 341, 357
storage area networks (SANs),
using fiber technologies in,
224??“225
STP (Spanning Tree Protocol)
and bridges, 379??“380
effective use with bridges,
399??“404
limitation of, 380??“381
protection of Ethernet networks
by, 276??“277
relationship to bridges and
switches, 10
Strict transmission service,
relationship to MAC
sublayer, 333
548 Index
STS-1s
combining via SONET
multiplexing, 268??“269
concatenating, 269??“270
relationship to SONET, 300
subscriber sites, preventing data
transfers between, 59??“60
subscribers, connecting to Ethernet
service providers, 59
superchannel, benefit in data
networking, 281
surveillance networks, using FSO
links in, 253
S-VLAN tags, relationship to
bridges, 384??“386
SWIS (Selective Wrap Independent
Steer), role in RPR, 342
switches
versus bridges, 377
connecting to bridges, 10
role in LANs, 9
and routers, 116
synchronization, importance in
circuit emulation scheme,
81??“82
Synchronous Digital Hierarchy
(SDH), standardization of, 300
Synchronous Payload Envelope
(SPE), relationship to
SONET300, 300??“302
Szeto, William, 265
T
T1 connections, use of, 95
T1/E1 technologies, pros and cons
of, 144
tags, use in backbone bridges, 395
TALS (TDM Access Line Service),
features of, 81
TDM (Time Division Multiplexing)
access network issues, 267??“268
bandwidth considerations, 32??“33
bandwidth increments of, 289
and circuit bonding, 267
comparing to ATM, Ethernet, and
Frame Relay, 26
disadvantage of, 36
technology description of, 266??“267
use of, 25
TDM emulation, use with hybrid
fiber-coax, 155
TDM Line Service (T-Line), features
of, 80
TDM networks, limited deployment
of Ethernet in, 265
TDM services
support for, 42
support in optical wireless mesh
networks, 252
support in WiMAX, 486
TDM solution, support for,
506??“511, 513
TDM support, availability in fiber
networks, 215??“216
TDM transmission capacity,
mapping payloads into, 266
telecom industry, capital-intensive
nature of, 112
telecommunications industry
cyclical nature of, 113
investment and recovery phases
of, 114
telecommunications transport
infrastructure,
example of, 24??“25, 27
Time Division Multiplexing (TDM)
access circuits.
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