C

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CAC (call admission control)
calculating
     long-distance savings in VoIP deployment
     ROI 2nd 3rd 4th
         investments 2nd 3rd
         returns 2nd
calculating downtime costs 2nd
call admission control
call hijacking
call quality
     maintaining 2nd
         performance factors 2nd
         QoS 2nd
         SLAs 2nd
     measuring 2nd 3rd 4th 5th 6th
     SLA metric 2nd
call routing tables
     maintaining
call setup
     VoIP calls
call setup performance
     SLA metric 2nd
call setup protocols 2nd
call setup response time
call-quality assessment
     performing 2nd 3rd
cancelling
     SLA contracts
CBWFQ
CDRs 2nd
     accounting 2nd
centralized call processing architectures
Centrex solutions
change management
chargeback 2nd
checksum field (IP packet header)
circuit-switched connections
Class 5 switches
classifying traffic 2nd 3rd
     prioritization
closed-box systems
clustering IP telephony servers
codecs 2nd
     bandwidth consumption
     compression techniques
     selecting 2nd 3rd
     transcoding
compiling
     current telephony usage information
         call flow analysis
         call volume statistics
         CDRs 2nd
components
     of PSTN
         PBXs
         signaling
         switches
         telephones
         voice encoding 2nd
    of VoIP
         call setup protocols 2nd
         codecs 2nd
         IP phones 2nd
         IP telephony servers 2nd
         PBXs 2nd
         routers
         softphones 2nd
         switches 2nd
         TCP/IP protocol stack 2nd 3rd 4th 5th
         voice streaming protocols 2nd 3rd
         VoIP gateways
compression
     lossy
con figura tion proxy
confidentiality
     CDRs 2nd
     overheard conversations 2nd
configuration assessment
     performing 2nd
configuration files
     maintaining 2nd
configuration management
     maintaining critical files 2nd
         call routing tables
         configuration files 2nd
         program files 2nd 3rd
     network inventory 2nd
     network topology, mapping 2nd
ConfigurationAssessment
configuring
     QoS 2nd
congestion
     determining need for QoS
convergence
     measuring in VoIP deployment 2nd
COPS (Common Open Policy Service)
correlation between delay and data rate
cost savings
    measuring in VoIP deployment
         productivity savings 2nd
     measuring potential in VoIP deployment
         expense savings
         long-distance savings 2nd
         network infrastructure savings 2nd 3rd
criteria for integrator selection 2nd 3rd 4th
criteria for MSP selection 2nd 3rd

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