Welcome to my website!

Computer Science& Engineering with experience in Systems Administration. Has Three year's experience in IT related job. Expertise in Database management,software development, Web Analysis & Develop, Networking and also any kinds of hardware solutions. Has Worked under UNDP's project as Network Engineer . I have also worked in a private university as a lecturer. Now I am working in Bangladesh Computer Council as Assistant programmer .

All of my information has described in this web site and everybody can easily download some essential software from this site.

Over-subscription of Voice Services

 

It is important for designers of VoIP over WLAN applications to understand some of the basic
concepts that have been applied for years in the PSTN. A basic understanding of oversubscription,
for example, can assist network planners who are evaluating network capacity for
enterprise VoIP over WLAN applications.
Telephone systems have been very closely monitored for over 100 years. The public telephone
system has always incorporated “statistical over-subscription” of phone lines. In the United
States, there are typically between four and eight phones per active (served) phone line in the
network. POTS (plain old telephone system) networks are designed to have a specific
probability that a call can be blocked from time to time. In the United States, call blocking is
typically limited to 1% or 0.5% of total calls.

Voice over Internet Protocol (VOIP)

 

Overview
Seamless wireless data and voice communication is fast becoming a reality. In fact, the
technology to enable one phone number for broadband wireless data and voice communication
is available now. The remaining issues facing handset designers, carriers and service providers
as well as enterprise and residential network designers relate to questions of deployment,
configuration and network architecture. One key capability in the next-generation wireless world
will be Voice over Internet Protocol (VoIP) using 802.11 wireless local area networks (WLANs).
TI provides a comprehensive portfolio of wireless technology and the integration capabilities
needed to support all aspects of a seamless wireless environment, which will certainly include
VoIP over WLAN applications.
For wireless equipment manufacturers, service providers and enterprise/home network
designers, VoIP over WLANs raises several deployment and planning issues concerning
quality-of-service (QoS), call control, network capacity, provisioning, architecture and others. In
addition, if the performance of each individual WLAN is to be optimized, these deployment
issues must be addressed individually on a WLAN-by-WLAN basis. The requirements of the
three main segments making up the WLAN marketplace also will have an effect on the
deployment parameters of WLANs