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Voice over IP First-Step - page 118



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D-channel
Data Connection (DC) Directory
databases, copying
DC (Data Connection) Directory
DE (Discard Eligible) bits
Default PHB
defining logarithmic scales
delay
     round trip
     serialization
deploying CCMs
design [See also configuration]
    CCM
         centralized call processing models
         distributed call processing models
         single-site models
     networks
     redundancy
determining GoS
devices
     edge
     redundancy
dial peers
dial plans
dialing
     pulse
     touch tone
     types
difference signals
Differentiated Service Code Point (DSCP)
DiffServ (Differentiated Services)
digital circuits, connecting
digital signal processors (DSPs) 2nd
digitizing voice [See also conversion]
direct gateway-to-gateway calls (H.323)
Direct Transfer feature (IP Phone)
DirTrfr softkey
disaster recovery
Discard Eligible (DE) bits 2nd
distributed call processing CCM design models
downtime, availability
drops
DSCP (Differentiated Service Code Point)
DSPs (digital signal processors) 2nd
DTMF (dual tone multifrequency)
dual token buckets
dual tone multifrequency (DTMF)
dual-rate policing




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E1, multiframes
ECN (Explicit Congestion Notification)
edge devices
EF (Expedited Forwarding)
efficiency (link)
encoding waveforms
encryption, CCM security
endpoints
     MGCP
     RTP streams
Erlangs, calculating
errors, quantization
ESF (Extended Super Frame)
Ethernet switches
events, MGCP gateways
exceeding traffic
Excess Burst (Be)
exchange area networks
Executive CCSs
existing phone systems, optimizing reliability
Expedited Forwarding (EF)
Explicit Congestion Notification (ECN)
Extended Super Frame (ESF)
Extensible Markup Language [See XML]
external power supplies (IP Phones)




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Fair Queuing (FQ)
Fast Link Pulse (FLP)
fault tolerance
     components
     MGCP
FECN (Forward Explicit Congestion Notification)
FIFO (first-in, first-out) queuing strategies 2nd
FLP (Fast Link Pulse)
Foreign Exchange Office (FXO) ports
Foreign Exchange Station (FXS) ports
Forward Explicit Congestion Notification (FECN)
forwarding calls
FQ (Fair Queuing)
Frame Relay
     PVC
     shaping
frames , multiframes
framing bits
frequencies
     analog
     DTMF
     of rings
FXO (Foreign Exchange Office) ports
FXS (Foreign Exchange Station) ports




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gatekeepers 2nd 3rd
gateways
     case study
     gateway-to-gateway calls (H.323)
     PIMG
     protocols
         H.323
         MGCP
         SIP
     registration
     resolution
glare
global synchronization
GoS (grade of service)
ground start signaling 2nd
Group Call Pickup feature (IP Phone)
grouping CCMs