Page 313 - Optical Switching And Networking Handbook

14_200023_Index 1/17/01 10:09 AM Page 298

298 Index

optical switching, 26 payload, STS-1, 66
bandwidth, 142–143 PDH (Plesiochronous Digital Hierarchy),
bottlenecks, telecom switches, 135–136 82–83
ink jet technology, 149–150 photonic networks, DWDM, 170
LambdaRouter, 140 Photonic Switching Platform, ink-jet
MANs, 127–132 technology, 149
MEMS, 137–138, 143 photophones, 8
ease of upgrade, 145 physical damage to fiberoptics, 49
micromirrors, 136 PicturePhones, 9
scalability, 144
PISK (Polarity-Inversion-Shift Keying), 52
opaque, 127–128
plesiochronous communications, 61, 84
OXCs, 146
PM (Phase Modulation), 51
ring interconnections, 134
point-to-multipoint configurations
SANs, 131
high-speed applications, 193
size issues, 130
multiplexing, SONET, 77
transparent, 127–128
point-to-point configurations
WANs, DWDM, 128
high-speed applications, 190
WIXCs, 146
multiplexing, SONET, 77
WSXCs, 147
pointers, SDH VCs, 96
optical telegraph, 8
polarization, 36
OSI model (Open Systems Interconnect),
PONs (Passive Optical Networks), 208
SDH architecture, 102
POS (IP over SONET), 199
overhead, SONET, 64
primary reference clock, synchronous
line, 65, 68–69
path, 66–72 transmission, 60
section, 68 protocols, 58
transport, 64 providers, acquisitions and mergers, 165
overview of fiberoptic functions, 14 PSK (Phase-Shift Keying) modulation, 51
OXCs (optical cross-connects), 146 PSTNs (public switched telephone
networks), fiberoptics
interoperability, 55
P PTE (path-terminating equipment),
SONET, 68
Packet on SONET, 199 pulses, signal transmission, 35
packet switching, 242, 250
path lengths, multimode graded index
fiberoptics, 42 Q-R
path overhead
SONET, 66–72 QoS (Quality of Service), impact of optical
STM-1 frames, SDH, 90 networks, 253–254