Towards junking the PBX: deploying IP telephony
NOSSDAV '01 Proceedings of the 11th international workshop on Network and operating systems support for digital audio and video
Simulation Modeling and Analysis
Simulation Modeling and Analysis
Switched, Fast, and Gigabit Ethernet, Third Edition
Switched, Fast, and Gigabit Ethernet, Third Edition
Assessing the quality of voice communications over internet backbones
IEEE/ACM Transactions on Networking (TON)
On credibility of simulation studies of telecommunication networks
IEEE Communications Magazine
Implementing VoIP: a voice transmission performance progress report
IEEE Communications Magazine
Assessing readiness of IP networks to support desktop videoconferencing using OPNET
Journal of Network and Computer Applications
An analytical simulator for deploying IP telephony
International Journal of Network Management
Performance of VoIP in Wired-Cum-Wireless Ethernet Network
International Journal of Interdisciplinary Telecommunications and Networking
End-to-End delay performance for VoIP on LTE system in access network
ICT-EurAsia'13 Proceedings of the 2013 international conference on Information and Communication Technology
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These days a massive deployment of VoIP is taking place over IP networks. VoIP deployment is a challenging task for network researchers and engineers. This paper presents a detailed simulation approach for deploying VoIP successfully. The simulation uses the OPNET network simulator.Recently OPNET has gained a considerable popularity in both academia and industry, but there is no formal or known approach or methodology as to how OPNET can be used to assess the support and readiness of an existing network in deploying VoIP.Our approach and work presented in this paper predict, prior to the purchase and deployment of VoIP equipment, the number of VoIP calls that can be sustained by an existing network while satisfying QoS requirements of all network services and leaving adequate capacity for future growth.As a case study, we apply the simulation approach on a typical network of a small enterprise. The paper presents a detailed description of simulation models for network topology and elements using OPNET.The paper describes modeling and representation of background and VoIP traffic, as well as various simulation configurations. Moreover, the paper discusses many design and engineering issues pertaining to the deployment of VoIP. These issues include characteristics of VoIP traffic and QoS requirements, VoIP flow and call distribution, defining future growth capacity, and measurement and impact of background traffic.