domingo, 30 de mayo de 2010

Voice Over IP (VoIP)

Voice Over IP (VoIP) enables the convergence of traditional voice and data services by using an IP network
as the transport for both voice and data services. Service providers have been experimenting with
VoIP for the past five years, and now with a value proposition revolving around network infrastructure
cost savings, operational savings and new revenue opportunities, its appeal is growing. VoIP is poised
to be strategic to the overall business of both premises-based IT organizations and Managed Service
Providers (MSP).

Voice Over IP (VoIP) services:
1. Internet Telephony Services
Internet telephony refers to communications services such as voice, facsimile, and/or voice
messaging applications that are transported via the public Internet. Internet telephony is an
unmanaged service where no single provider on the Internet is responsible for end-to-end quality of
2. IP Telephony Services
IP Telephony is a managed service with guarantees of service that can support full-duplex, real-time
voice communications. There are two types of IP Telephony services:
1. Premised-Based
A Hybrid PBX or an IP-PBX is installed on the premises replacing an existing TDM-PBX.
2. Network-Based
Centrex IP and Hosted IP-PBX are hosted services provided by a Managed Service

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