Acid Bit

By Moses Holder

 T1 connections are basically high speed data and voice connections. When you subscribe for a T1 connection the service provider lays optic fiber cables at your premises and you get a dedicated connection to the server of the internet service provider.

A conventional telephone line converts the voice of the speaker into analog signals which are transported through copper wires and get reconverted into sound at the receiver’s end. This has been the only mode of voice communication through the years and by itself is still a reasonably efficient means of communication.

But with globalization and liberalization being the driving force of most of the economies of the world and with phenomenally improved transportation facilities, business has become a multinational phenomenon and physical distances are no longer an insurmountable barrier.

With the spread of the business being far and wide, the need for rapid, uninterrupted and noise free communication has become the order of the day. The volume of communication has increased manifold and so is the need for a hyper efficient and reliable medium through which such communication can be done.

T1 service is another way making your voice communication more reliable and hassle free. The digital circuitry uses channels to carry voice and data. The capacity of such channels is far more than the conventional phone lines. In one such channel twenty four separate calls can be made! That is to say, if you take one T1 connection, you are actually taking twenty four telephone lines.

Instead of converting your voice in to analog signals, it is converted into digital signals and then transmitted over optic fiber cables. This lends extreme clarity to the spoken words - the receiver can hear exactly what is spoken without the accompanying noise or hum which is common in conventional phone lines.

Since the optic fiber cables carry any sort of digitized data, a T1 connection can be used for both the purposes. So, popularly T1 connections are referred to either as voice T1 or data T1.

The beauty of T1 lies in its flexibility. In conventional phones, lines are assigned to users. But in this sort of voice communication it is not so. Suppose you are in desperate need of some business discussion on the phone. You find that your boss’s phone is free but you can’t go in his cabin and use that instrument since he is busy in a meeting. What do you do? Well, twiddle your thumbs and perspire in anxiety!

But if your office has a T1 connection, you can call from any phone within the office and if at least one channel is free at that point of time; you would be able to communicate.

This flexibility allows maximum and most efficient utilization of a T1 service. To put matters in perspective, a twenty four channel T1 connection can serve at least one hundred members of an office without difficulty. Since this connection can utilized in a much better way, it is advisable to give this option a serious thought.

Find tips about morning anxiety and sleep anxiety at the Coping With Anxiety website.

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Satellite Internet and Voip Systems

By Moses Holder

 VoIP has revolutionized the way telecommunication is done. Voice over Internet protocol allows voice packets to be sent over Internet bandwidth enabling cheap communication. There are many companies which offer voice over Internet services and some of the leading ones are Vonage, Skype, Yahoo and Net2Phone. Consumers can access VoIP over Internet connections like broadband and DSL. Satellite Internet is a new technology that has become very popular in recent times and VoIP providers are able to offer services to customers in remote regions using it. It will still take some time until VOIP by satellite is ultimately stabilized and customers can enjoy the full benefits.

Some of the challenges faced by service providers include packet loss, jitters and limited bandwidth. Service providers like Hughes and Skyframes which have their own satellites are teaming up with the VoIP providers to offer voice services to customers. Designing a VoIP network would require details on the bandwidth requirement for VoIP data. Satellite Internet providers are facing challenges on the bandwidth capacity that would be required to offer VoIP services via satellite channels. G.729 (b) encoding with a 40 b payload and header compression would require 10 Kbps of bandwidth. Packet loss is another challenge faced by service providers offering satellite VoIP services. Packet loss causes degradation in voice quality. The protocol used for voice traffic transmission is UDP/IP and if the data packets are corrupted they cannot be retransmitted. TCP/IP protocol allows retransmission of data packets. It is important to maintain very low bit error rates to offer high quality voice services to customers. Jitters are another technology hurdle that is faced by satellite VoIP service providers. It is used to calculate the delays in packet arrivals that happen because of network delay. If this factor is not within acceptable limits the quality of voice becomes poor and the receiver may not be able to enjoy a good conversation. Jitter buffers are used to overcome this hurdle and ensure that there is less delay in the network. Researchers and scientists are working relentlessly to overcome all hurdles that come in way of experiencing a smooth voice call through satellite Internet.

VoIP by satellite is not ideal because of some more factors. Latency factor refers to the time delay in locating the Geo-stationary satellite and the speed of light. There is a delay of 280 msec because of latency factor. Traffic congestion in the network also affects the quality of VoIP service. This can result in voice packets being dropped, delayed or reaching the receiver out of sequence. Compression technology is another parameter for delivering high quality VoIP service. There are two compression technologies that are followed as industry standards. The G.729 codec uses bandwidth of 18Kbps and RTP uses around 10 Kbps per second. If service providers are able to cope with the technological challenges of VoIP over satellite, it will not be long before remote areas of the United States can connect with the rest of the world.

To learn about fighting anxiety and morning anxiety, visit the Coping With Anxiety website.

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