| [SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] 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 |