guide-to-isp.com

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This paper introduces Stone Gate Multi-Link
Technology as a solution to enterprises’ ISP multi-homing needs. It discuss how Multi-Link
Optimizes the use of network providers such as ISPs and realizes the benefits of virtual
Private networks. It describes Multi-Link operating principles and functionality with
Respect to other relevant technologies. You can benefit from implementing
Multi-Link in your network. Stone Gate Multi-Link represents significant advance in multi-homing technology.

When you connect to the Internet, you might connect through a regular modem, through a local-area network connection in your office, through a cable modem or through a digital subscriber line (DSL) connection. DSL is a very high-speed connection that uses the same wires as a regular telephone line.
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Here are some advantages of DSL:

• You can leave your Internet connection open and still use the phone line for voice calls.
• The speed is much higher than a regular modem
• DSL doesn’t necessarily require new wiring; it can use the phone line you already have.
• The company that offers DSL will usually provide the modem as part of the installation.

But there are disadvantages:

• A DSL connection works better when you are closer to the provider’s central office. The farther away you get from the central office, the weaker the signal becomes.
• The connection is faster for receiving data than it is for sending data over the Internet.
• The service is not available everywhere.

In this article, we explain how a DSL connection manages to squeeze more information through a standard phone line — and lets you make regular telephone calls even when you’re online.

Telephone Lines
If you have read How Telephones Work, then you know that a standard telephone installation in the United States consists of a pair of copper wires that the phone company installs in your home. The copper wires have lots of room for carrying more than your phone conversations — they are capable of handling a much greater bandwidth, or range of frequencies, than that demanded for voice. DSL exploits this “extra capacity” to carry information on the wire without disturbing the line’s ability to carry conversations. The entire plan is based on matching particular frequencies to specific tasks.

To understand DSL, you first need to know a couple of things about a normal telephone line — the kind that telephone professionals call POTS, for Plain Old Telephone Service. One of the ways that POTS makes the most of the telephone company’s wires and equipment is by limiting the frequencies that the switches, telephones and other equipment will carry. Human voices, speaking in normal conversational tones, can be carried in a frequency range of 0 to 3,400 Hertz (cycles per second — see How Telephones Work for a great demonstration of this). This range of frequencies is tiny. For example, compare this to the range of most stereo speakers, which cover from roughly 20 Hertz to 20,000 Hertz. And the wires themselves have the potential to handle frequencies up to several million Hertz in most cases.

The use of such a small portion of the wire’s total bandwidth is historical — remember that the telephone system has been in place, using a pair of copper wires to each home, for about a century. By limiting the frequencies carried over the lines, the telephone system can pack lots of wires into a very small space without worrying about interference between lines. Modern equipment that sends digital rather than analog data can safely use much more of the telephone line’s capacity. DSL does just that.

via [HowStuffWorks]

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HowStuffWorks

ISDN, which stands for Integrated Services Digital Network, is a system of digital phone connections which has been available for over a decade. This system allows voice and data to be transmitted simultaneously across the world using end-to-end digital connectivity.

With ISDN, voice and data are carried by bearer channels (B channels) occupying a bandwidth of 64 kb/s (bits per second). Some switches limit B channels to a capacity of 56 kb/s. A data channel (D channel) handles signaling at 16 kb/s or 64 kb/s, depending on the service type. Note that, in ISDN terminology, “k” means 1000 (103), not 1024 (210) as in many computer applications (the designator “K” is sometimes used to represent this value); therefore, a 64 kb/s channel carries data at a rate of 64000 b/s. A new set of standard prefixes has recently been created to handle this. Under this scheme, “k” (kilo-) means 1000 (103), “M” (mega-) means 1000000 (106), and so on, and “Ki” (kibi-) means 1024 (210), “Mi” (mebi-) means 1048576 (220), and so on.

(An alert reader pointed out some inconsistencies in my use of unit terminology throughout this Tutorial. He also referred me to a definitive web site. As a result, I have made every effort to both conform to standard terminology, and to use it consistently. I appreciate helpful user input like this!)

There are two basic types of ISDN service: Basic Rate Interface (BRI) and Primary Rate Interface (PRI). BRI consists of two 64 kb/s B channels and one 16 kb/s D channel for a total of 144 kb/s. This basic service is intended to meet the needs of most individual users.

PRI is intended for users with greater capacity requirements. Typically the channel structure is 23 B channels plus one 64 kb/s D channel for a total of 1536 kb/s. In Europe, PRI consists of 30 B channels plus one 64 kb/s D channel for a total of 1984 kb/s. It is also possible to support multiple PRI lines with one 64 kb/s D channel using Non-Facility Associated Signaling (NFAS).

H channels provide a way to aggregate B channels. They are implemented as:

• H0=384 kb/s (6 B channels)
• H10=1472 kb/s (23 B channels)
• H11=1536 kb/s (24 B channels)
• H12=1920 kb/s (30 B channels) – International (E1) only

To access BRI service, it is necessary to subscribe to an ISDN phone line. Customer must be within 18000 feet (about 3.4 miles or 5.5 km) of the telephone company central office for BRI service; beyond that, expensive repeater devices are required, or ISDN service may not be available at all. Customers will also need special equipment to communicate with the phone company switch and with other ISDN devices. These devices include ISDN Terminal Adapters (sometimes called, incorrectly, “ISDN Modems”) and ISDN Routers.

via [Ralphb.net]

Cable Internet Access or Cable Internet refers to the delivery of Internet service through Cable modems, along with DSL technology, are the two primary types of broadband Internet access.

Bit rate of business cable modem service typically range from 2 megabits per second (Mbit/s) up to 50 Mbit/s or more.
The upstream rate on residential cable modem service usually ranges from 384 kilobits per second (kbit/s) to 20 Mbit/s or more. Many cable operators offer different service tiers, some with ‘home’ and ‘business’ designations.

There are two potential disadvantages to cable internet:

1. Like all residential broadband network technologies (e.g. DSL, FTTX, Satellite internet, WiMAX), a fixed channel capacity is shared by a population of users (in the case of cable internet, users in a neighborhood share the available capacity provided by a single coaxial cable line). Therefore, service speed can vary depending on how many people are using the service at the same time. This arrangement allows the network operator to take advantage of statistical multiplexing in order to provide an adequate level of service at an acceptable price. However, the operator has to monitor usage patterns, and scale the network appropriately, to ensure that customers receive adequate service even during peak usage times. Some operators also use a bandwidth cap.

2. Many cable Internet providers are reluctant to offer cable modem access without tying it to a cable television subscription. They do this by charging higher rates, say $60/month for cable modem only access, than if one bundles it with a cable TV plan where it might be $40/month for cable modem service plus $40/month for cable TV service. This is because you receive free basic TV with just internet service. This has ramifications similar to those of the lack of naked DSL. Cable internet access providers who resell access from cable companies, such as Earthlink, are generally not subject to these higher rates. However, they cannot give you internet access if you don’t have cable service.

Cable Internet Equipment

Broadband cable internet access requires a cable modem (CM) at the customer premises and a CMTS located at a cable operator facility (typically a headend or hub location). The two are connected via coaxial cable or, more commonly, a Hybrid Fiber Coaxial plant. While access network technologies are sometimes referred to as “last-mile” (or “first-mile”) technologies, cable internet systems can typically operate where the distance between the CM and CMTS is up to 100 miles (160 km).

via [Wikipedia]

While they may offer good prices for subscribing, new players in the ISP market must be analyzed thoroughly. It should not be a short term investment but more on a long one.

Managed hosting providers offer customized solution than other pre-packaged basic web hosting solutions. ASP codes allow you to link your web pages to a database, where users can interact with the web page by logging in and using their own personal settings or they can interactively place orders on your web site.

Give your servers the benefits and security of a state-of-the-art data-center. Choose between the private racks, remotely managed racks, cages and Internet connectivity options.

Satellite Internet services are used in locations where terrestrial Internet access is not available and in locations which move frequently. Internet access via satellite is available worldwide, including vessels at sea and mobile land vehicles. There are three types of satellite Internet service.

Remote sites use the proxy server at the earth station (teleport), which is configured to route all outbound traffic to the QoS server, which makes sure no user exceeds their allotted bandwidth or monthly traffic limits. Traffic is then sent to the encapsulator, which puts the IP packets inside of DVB packets. The DVB packets are then sent to the DVB modem and then to the transmitter (BUC).

via [Wikipedia]

While browsing the web, we will be running into a lot of banner ads to which we will see too good to be true offers that include low cost Internet connection services. This is of course a marketing strategy to gain attention and for sure, we should explore these offers more in detail before making hasty decisions.

One thing about new ISPs is that they can provide you good services in the first couple of months. But the thing is, up to when will the service be reliable? Do remember that the law of averages is bound to catch up. And this includes considering the company’s ability to adhere towards the growing demand of Internet connections today.

As far as making the final decision on what ISP to turn to, it remains that we will be checking out what goes along with it. There are some special cases where promotions make the pot sweeter and the right time to sign up with ISPs today.

There are many great web hosting sites out there, but some are just better than others. They got a lot of great things to offer, and they are able to offer you it at a price that most of us can afford. On top of that, they offer great customer support so you never have to try and figure anything out by yourself. That is a great thing that I wish that all web hosting sites offered. If you are not fully happy with the package that you get, then you can get your money back!

The Internet is full of online games these days and apparently, the speed of your Internet will be important to the game addicts such as the kids and teens. Consistency and availing of the high speed Internet services is one thing and if you are determined to be at an advantage, you may find yourself subscribed to the better speed features on the web today.

Being online most of the time justified why people want a good ISP to be affiliated with. But the problem is, would the rates being commanded by them become justifiable to the whole thing? It would be best to do some pencil pushing as this issue will surely be something people will address in the future.