nal itself. On the other, it can describe the performance of the underlying transport mechanisms.
However, VQ is defined as the qualitative and quantitative measure of the sound and conversation
quality of a telephone call.
As the telephone industry changes-that is, as new technologies and services are added-existing
technologies are applied in different ways, and new players become involved. Thus, maintaining the
basic quality of a telephone call becomes increasingly complex. Although VQ has evolved over the
years to be consistently high and predictable, it is now an important differentiati..................[:=> Show Contents <=:]
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Posted by: computer science crazy
Created at: Monday 22nd of September 2008 12:35:17 AM
Last Edited Or Replied at :Monday 22nd of September 2008 12:35:17 AM
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vices. In the downstream direction, a PON is a P2MP network, and in the upstream direction it is a
MP2P network.
The advantages of using PONs in subscriber access networks are numerous.
1. PONs allow for long reach between central offices and customer premises, operating at distances
over 20km.
2. PONs minimizes fiber deployment in both the local exchange office and local loop.
3. PONs provides higher bandwidth due to deeper fiber penetration, offering gigabit per second
solutions.
4. Operating in the downstream as a broadcast network, PONs allow for video broadcasting as either
IP vide..................[:=> Show Contents <=:]
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Posted by: computer science crazy
Created at: Monday 22nd of September 2008 12:17:15 AM
Last Edited Or Replied at :Tuesday 14th of February 2012 04:00:03 AM
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h is going to drive majority of electronic chips in the coming years.
Concept of Clocks
The clock is a tiny crystal oscillator that resides in the heart of every microprocessor chip. The
clock is what which sets the basic rhythm used throughout the machine. The clock orchestrates the
synchronous dance of electrons that course through the hundreds of millions of wires and transistors
of a modern computer.
Such crystals which tick up to 2 billion times each second in the fastest of today's desktop
personal computers, dictate the timing of every circuit in every one of the chips that ..................[:=> Show Contents <=:]
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Posted by: dhineshr
Created at: Friday 15th of January 2010 10:40:12 AM
Last Edited Or Replied at :Friday 24th of September 2010 02:36:56 AM
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Hi! I want the detailed advantages and disadva..................[:=> Show Contents <=:]
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Posted by: computer science crazy
Created at: Sunday 21st of September 2008 02:08:30 AM
Last Edited Or Replied at :Tuesday 06th of March 2012 12:47:45 AM
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e details of this network, including the dy..................[:=> Show Contents <=:]
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Posted by: computer science crazy
Created at: Sunday 21st of September 2008 01:31:52 AM
Last Edited Or Replied at :Thursday 16th of February 2012 12:18:17 AM
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nts, Redcentre established a network between DSTO ANU researchers, CEA Technologies, Cantec
Australasia and Neolite Neon for further development and future commercialization of this
technology. The plasma antenna R & D project has proceeded over the last year at the Australian
National University in response to a DSTO (Defence Science and Technology Organisation) contract to
develop a new antenna solution that minimizes antenna detectability by radar. Since then, an
investigation of the wider technical issues of existing antenna systems has revealed areas where
plasma antennas might be useful...................[:=> Show Contents <=:]
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Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:52:21 AM
Last Edited Or Replied at :Saturday 22nd of December 2012 12:22:04 AM
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soft handoff.
The RNC performs tasks in a 3G wireless network analogous to those of the Base Station Controller
(BSC) in a 2G or 2.5G network. It interfaces with GPRS Service Nodes (SGSNs) and Gateways (GGSNs) to
mediate with the network service providers.
A radio network controller manages hundreds of Node B transceiver stations while switching and
provisioning services off the Mobile Switching Center and 3G data network interfaces. The connection
from the RNC to a Node B is called the User Plane Interface Layer and it uses T1/E1 transport to the
RNC.
Due to the large number of Node..................[:=> Show Contents <=:]
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Posted by: computer science crazy
Created at: Saturday 07th of February 2009 01:14:49 PM
Last Edited Or Replied at :Saturday 07th of February 2009 01:14:49 PM
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|
oblem, Ariane-5
The Birth of Software Engineering
During the initial days of computing, software development organizations didn?t use the systematic
methodology for the development. The software development was considered as coding, though coding
forms a very small percentage of total development effort. This non systematic approach led to the
?software crisis?.
In the year 1968, a conference sponsored by the NATO (North Atlantic Treaty Organization) science
committee addressed the ?software crisis? that was prevailing in those days..................[:=> Show Contents <=:]
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