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Voice over IP

There are many benefits for development of VoIP enabled equipment:-
• Cost reduction. There can be a real savings in long distance telephone costs which is       
   extremely important to most companies, particularly those with international markets.
• Integration. Voice/data networks allow more standardisation and reduces total
   equipment needs.
• The ability to eliminate points of failure, consolidate accounting systems and combine
   operations is clearly more efficient.
• Advanced Applications. The long run benefits of VoIP include support for multimedia
   and multiservice applications, something with which today's telephone system can't
   compete.
There are issues with voice quality, latency and packet loss as well as call control and system 
management.
Voice can be carried over packet or cell switched networks. Frame Relay and IP insert data into 
variable-sized frames or packets. ATM chops data into small cells, which facilitates fast switching of data
through the network.
The packet switching and cell switching networks perform statistical multiplexing. That is, 
they dynamically allocate bandwidth to various links based on their transmission activity.
To achieve good voice quality, the delay of voice packets across the network must be
minimal and fixed. Due to the shared nature of the packet/cell switching network, it might take time for
transmissions to travel across the network. A transmission can be delayed because of network
congestion. For example, it might get stuck behind a long data transmission that delays other packets.
Network congestion can also result in dropped packets, which also detrimentally affects the integrity of
voice transmissions.
One way to deal with the problem of delay and congestion is to add bandwidth to the network at critical 
junctures. Although this is feasible in the backbone, it is a costly and ineffective solution at the point of
access, defeating the "bandwidth sharing" benefits of packet networks. The best solution is to implement
mechanisms at the customer premises, access node and backbone which manage congestion and delay.
There are many techniques for doing this.
Without a doubt, the data revolution will have greater impact in the coming years, with more and more 
voice traffic moving onto data networks. Makom will help you to make the right choices for your business
in making the most of this technology. Users with integrated voice and data services over one
infrastructure will benefit with interworking between voice and all types of data.