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March 07, 2008
Hosted PBX: An Effective Way to Implement VoIP
By Brian Solomon, TMCnet Web Editor
As Voice over IP  is deployed in Enterprise networks, IP Centrex and VPN services, it is vital to implement a performance management framework that is sufficient to deal with many operational problems that arise. IP Centrex or Hosted PBX services provide a cost effective solution for enterprise customers, minimizing capital outlay and outsourcing the headache of deploying and managing next generation telecom services. Telephony is mission critical for most businesses, and customers expect that new generation services deliver the quality and reliability that they had with traditional phone service.
Hosted PBX ( News - Alert) services bring particular call quality and performance management challenges. The service provider is responsible for the call management (softswitch) function; however voice packets travel over both the customer LAN and service provider network. Problems are compounded by the transient and unpredictable nature of IP impairments that can make problem location and diagnosis difficult, as well as the presence of firewall routers on the voice path.
This application note describes the typical performance issues that service providers encounter when deploying IP Centrex networks, and introduces a management framework that enables them to detect, address and resolve these problems.
Customers expect that their Hosted PBX service provider will manage the quality of the service they provide, thus requiring that the service provider monitor and manage call quality and troubleshoot any related problems. In today’s market, customers often request a SLA to hold the service provider accountable for overall service and call quality.
Brian Solomon is a Web Editor for TMCnet, covering news in the IP communications, call center and customer relationship management industries. To see more of his articles, please visit Brian Solomon’s columnist page.
Don't forget to check out TMCnet’s White Paper Library, which provides a selection of in-depth information on relevant topics affecting the IP Communications industry. The library offers white papers, case studies and other documents which are free to registered users. Service Level Agreement (SLA) | X | | This is an introduction to the planning for QoS and Service Level Agreements. Simply, your performance is QoS and the guarantee is the SLA. That is, if you are not receiving the desired QoS from your ...more |
Local Area Network (LAN) | X | | There is much more to LANs to explain on a few words. Pleases refer to TECHtionary.com for a vast set of tutorials on this subject. LAN connections use 48-bit MAC addresses permanently fixed into th...more |
Internet Protocol (IP) | X | | IP stands for Internet Protocol, a data-networking protocol developed throughout the 1980s. It is the established standard protocol for transmitting and receiving data
in packets over the Internet. I...more |
Private Branch Exchange (PBX) | X | | Originally, telephone features were provided by telephone central office switching systems, often called CENTREX.�PBX systems emerged as customers wanted to have more calling features and control over...more |
IP Centrex | X | | Voice over Internet Protocol may take many forms. IP Centrex is one example.
IP CENTREX requires an IP CENTREX Feature Gateway to provide the protocol conversion from IP to TDM time slot protocol use...more |
(source: http://www.tmcnet.com/channels/hosted-pbx/articles/22481-hosted-pbx-an-effective-way-implement-voip.htm)
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