See also architectural
layers
OTM (optical terminal multiplexer)
systems, use of, 202??“203
544 Index
Index 545
OTN architecture, definition of, 211
oversubscription, relationship to
circuit bonding, 277
P
packet networking, strength of, 276
Packet PHYs in RPR, requirements
for, 353
packet services, technologies used
by, 24
packet traffic, growth of, 360
packets
delivering over shared rings, 328
forwarding, 422
processing by IP routers, 281
relationship to Ethernet
switches, 277
packet-switched networks, types
of, 421
Passive Fiber Coupled Systems
(PFCS), use of, 238
Passive Optical Networks (PONs).
See PONs (Passive Optical
Networks)
passive splitter combiners (PSCs),
use in PONs, 177
PBB (Provider Backbone Bridging),
role in Carrier Ethernet, 82??“83
PBB-TE, characteristics of, 417
PBT/PBB-TE, significance of, 83??“85
PDH (plesiochronous digital
hierarchy) standards, examples
of, 198
PDH services, supporting over
MEN/SEN, 81
PDU (Protocol Data Unit).
See Ethernet frames
performance monitoring
functionality, relationship
to OAM, 90??“91
PFCS (Passive Fiber Coupled
Systems), use of, 238
phototonic integrated circuit
(PIC), relationship to WDM
networks, 226
PHY (Physical Layer Protocol)
role in implementing RPR
stations and networks,
349??“350
role in RPR, 353??“355
and WiMAX, 478??“481
PHY service, role in RPR layer
model, 331
Physical layer, explanation of, 4, 125
PIC (phototonic integrated circuit),
relationship to WDM
networks, 226
plain-old telephone lines, delivery of
Ethernet over, 131??“132
planes, relationship to layers of
reference model, 126
plesiochronous digital hierarchy
(PDH) standards, examples
of, 198
point of presence (PoP) locations, use
of EoF and EoWDM in, 226
point-to-multipoint (PtM) mesh
network, explanation of, 247
point-to-point (PtP) mesh network,
explanation of, 247
point-to-point circuit-bonding
solutions,
deployment of, 280
point-to-point design, using with
RPR, 362??“364
point-to-point DWDM transport, role
in optical networks, 202??“205
Point-to-Point EVC, designation as
E-LINE service, 70
PONs (Passive Optical Networks),
194??“195.
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