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Identity Rosecom.Net ADSL Question and Answers
We present this information in a Q & A (Question and Answers) format that will be useful. Our current knowledge relates primarily to DSL access in the USA and Canada, although, we understand that there are plans to deploy DSL access in most countries. We welcome feedback and comments from any readers on the usefulness or content. Part of the Q &A is general in nature and although it contains technical phrases (since it is a technical subject). These are used as few as possible. All aspects of the Internet, and especially new technology series such as DSL are constantly changing. We are providing the best information available to us as at date of writing and intend to update it periodically as we become aware of changes and/or more information becomes available. We intend this Q&A as a guide only and recommend that user obtain specific information to determine applicability to their specific requirements. (This is another way of saying that we cannot be held liable or responsible for the content.) Introduction. Rosecom.Net will offer modems to its customers at minimum cost. Our software enables the interconnection of local and wide area networks to the Internet using any connection method including modem or cable modem. Accordingly, we are neutral on the technologies or methods used by people to connect to the Internet (but admit to being biased to encouraging people to connect somehow). DSL access to the Internet is becoming increasingly available at decreasing prices directly or indirectly from an increasing number of telephone companies (‘Telco’s.’). It also appears to becoming more acceptable by small business users, education and large businesses. From our test, from our own use, from feedback we have received from users, from the recent progress made by DSL companies and from what we read, it would appear that accessing the internet via DSL systems is an option that is definitely worth considering for users who have it available to them. Part One: Question 1. What is DSL? 2. What is special about DSL? 3. What is PPPOE? 4. What is modem? 5. How does DSL compare to Analogue modems, Cable modems and ISDN? 6. What are the main benefits of connecting to internet via DSL? 7 Can everyone have Internet access via DSL service? 8. How do I get connected to the Internet via DSL? 9. Do I need a separate telephone line foe the DSL service? 10. What is the theoretical performance of DSL services? 11. What is the real-world performance of DSL? 12. How do I determine how far I am from my Center office? 13. What equipment do I need to get connected to the Internet? 14. How does the DSL line physically attach to my computer? 15. Does DSL provide a regular phone service also? 16. Can I convert an existing line to DSL or do I need a new line? 17. Can I convert an ISDN line to DSL? 18. How much does it cost? 19. How am I billed? 20. How should I choose between what types of connection to use? 21. What is the point of having all this bandwidth available? 22. Can I convert from my existing DSL service to “Splitterless” DSL? PART ONE ANSWERS
DSL refers to a class of technology used to obtain more bandwidth over existing copper telephone cabling running between a customer’s premises and a Telco’s Central Office. DSL allows simultaneous voice and high-speed data services such as supper fast Internet access over a single pair of copper telephone wires. Several variations of ‘DSL’ include: ADSL - ASYMMETRIC Digital Subscriber line R-ADSL- Rate-Adaptive Digital Subscriber line HDSL - High Bit-Rate Digital Subscriber line SDSL- Symmetric Digital Subscriber line As the saying goes, there is no such thing as a free lunch’ and a Telco must make compromises between costs, distance, speeds, reliability, equipment, etc when implementing or offering ‘DSL’ services, Each variation of ‘DSL’ reflects the different compromises made by Telco’s when deciding how far and how fast data can flow on a particular kind of subscriber line. 2.
What is special about DSL? The cables connecting most households to the phone network are simple twisted pair copper wires, which heave only been able to carry analogue traffic. Modem speeds have gradually increased with various compression and other techniques. However, the theoretical limit for this technology as of today is the fastest speed achievable with conventional modems which is 56 Kilobits approaching. DSL technology enables much higher speeds across the twisted pair lines from the Central Office to the home, school or business. Speeds up to 2 Megabits per second are achievable in some areas –30 or more times faster than today’s fastest modems. This means that some consumers and tele-workers will be able to use applications that need these higher speeds even if high performance (fibre) cable networks are not available in their location. 3. What is PPPOE?
4. What is DSL Modem?
Analogue modems allow digital data to flow over the Telco’s existing analogue network by performing digital to analogue conversion for transmission onto the network and vice versa on the receiving end. The only necessity for analogue modems is that each end of the call must have a compatible modem. This makes analogue modem connections the ubiquitous form of date communications available today. However, analogue modems are limited by the Telco’s voice bandwidth service. Current analogue modems are struggling to achieve rates of only 56 kibitz/s over those networks. Cable modems are capable of very high-speed throughput (bandwidth) and are used when accessing the Internet across a television cable company’s network (usually fibre). However, access via cable modem from a cable company is normally structured in a way that a group of users share ‘node’ in a specific area. The more subscribers in that area, the less bandwidth is available to each. Therefore, although the cable modem itself can handle high throughput, the bandwidth available to a user may be less. ISDN is a Telco technology that provides digital service across existing telephone copper wiring typically in increments of 64 kibitz/s channels. ISDN has been around for This ISDN can handle multiple communication channels simultaneously. Its high cost has made its usage limited. DSL are also Telco technologies but unlike ISDN, they appear to be gaining widespread Telco approval. Backed by the Telco, they appear the candidates to provide next generation high bandwidth services to the home, school or business using the existing telephone cabling infrastructure. DSL technology puts a high-speed digital link on the copper telephone line, and routes it directly to a packet switching data network for efficient wide area transmission, using the voice network. DSL modems use digital coding techniques to squeeze up to 99% more capacity out a copper telephone line without interfering with regular phone services. That means you could be simultaneously talking on the phone or sending a fax- while accessing web pages on the Internet. 6. What are the main benefits of connecting to Internet via DSL?
DSL can provide virtually instaneous transmission of voice, date and video over ordinary copper phone lines. A DSL connection can eliminate the frustrating delays associated when waiting to download information and graphics from the Internet. It provides residential subscribers with a cost effective uninterrupted high-speed Internet connection. For schools, a business and branch office, DSL provides fast access to mission-critical information on corporate Internet servers and the Internet. Another significant benefit is that a DSL connection is always on- line (like a LAN connection) with no waiting time for dialing or connecting. 7. Can everyone have Internet access via DSL services?
To get connected to the service, the customer has to be within the NITEL Cable network and have a NITEL Land Line connected to his premises. It should be noted that as of today DSL Service is basically a cable network service and will be available to areas that has a Telco Cable Network Coverage. As of today NITEL with the widest cable network coverage in the country is one of the Telco companies offering DSL Service. NITEL is offering the DSL Service through ISPs and Rosecom.Net is one of the major service provider with more than 3,000 lines to deploy in Abuja and Lagos. If you desire the service, you can call our customer service line of (09)-4131844, 4131845 or visit our website to fill our online registration form at www.Rosecom.net. Or send a mail to info@rosecom.net 8. How do I get connected to the Internet via DSL?
With a NITEL line available in your place, you will have to contact an ISP like Rosecom.net through which you will buy the connection equipment such as ADSL Modems, splitters e.t.c. Through the ISP, your connection will be arranged and carried out immediately. It must be added were here that you will still continue to use calls normally as before without interruptions. 9. Do I need a separate telephone line for the DSL service?
10. What is the theoretical performance of DSL? As mentioned previously, there are different types of DSL services. They are: ADSL – Asymmetric Digital Subscriber Line R – ADSL – Rate-Adaptive Digital Subscriber Line HDSL - High Bit –Rate Digital Subscriber Line VDSL – Very High Bit- Digital Subscriber Line SDSL – Symmetric Digital Subscriber Line Here is a simple table you see the theoretical performances of the different types of DSL services. As you can see the theoretical performance of some DSL services are quite comparable to T1 and E1 speeds that are usually more appropriate in Universities and corporate environments. Note however that many users of high-speed connectivity often purchase subsets (i.e. lesser) bandwidth than the theoretical maximum.
11. What is real- world performance of DSL? One factor, which affects the performance of DSL services, is distance from the Telco center Office to the home, school or business, which the DSL line is connected to. In the table above, you will see a column for distance. This represents the maximum distance at which you would see the bandwidth listed for that service. The further away you are from the Center office, the lower the perceive speed. However, this can improved on with the use of other transmitting media like fiber and modems e.t.c. 12. How do I determine how far I am from my Center Office? Your ISP or Telco should be able to calculate this information for you in airline and/or wire feet. The closer you are to your Center Office, the higher the speeds you can achieve using DSL. This will also determine the type of DSL service available to you. Contact an ISP to determine how best to serve you.
The hardware required to make DSL work is effectively an ADSL modem (in your home or office). It is possible to buy your ADSL modem directly from your Telco or DSL ISP to ensure complete compatibility with their network equipment. There are two other pieces of equipment you will need on your end to make your ADSL modem work: a computer, and an interface card such as an Ethernet 10 base T card. You will also require a splitter, which comes along with the ADSL modem. 14. How does the DSL line physically attach to my computer? The ADSL modem is plugged into the telephone line and the Ethernet cable connected into the ADSL modem is plugged into the back of a Computer, into a router or into a Ethernet hub to distribute the access to other computers. A router requires a single IP address for itself, supplied by the ISP. The router then connects to an Ethernet network utilizing Ethernet cables. If the modem is plugged directly into your computer, a specially wired cable called a “crossover cable” may have to be used. ADSL modems can also be an internal PCL and which accept the DSL line directly. A Rosecom.Net solution is an easy-to-use cost-effective alternative. It will allow multiple users on a local network to simultaneously share one ordinary ISP account and DSL connection to the Internet. The combination of a Roseom.Net solution and a DSL modem is ideal in a number of scenarios where Internet access is require by more than one computer, whether at home, school or in business. 15. Does DSL provide regular phone service also? Some Telco’s provide POTS service on the ADSL line. This means that you get a POTS splitter box that lets you plug a telephone, fax machine, regular modem, or Answering machine into the ADSL line in addition to the ADSL modem. Simultaneous use of POTS service does not eat into ADSL bandwidth. However, some Telco’s do not offer the capability of running POTS on their ADSL line and will install a new line to be used only for the ADSL service.
Yes you can, you can convert an existing line to an ADSL line. However, the best thing is to call your local Telco or ISP for further information. You should therefore, call Rosecom.net at (09)-4131844 or 4131845 for more information. 17. Can I convert an ISDN line to DSL? ISDN line can, in most cases, be converted to DSL. 18. How much does it cost?
The cost of this service includes the cost of ADSL
modem and your monthly Bandwidth access payment. The cost therefore,
includes the cost of hardware and cost of internet access. We at
Rosecom.net are charging moderately to make the service affordable for
most people. Our costs therefore, is as from 19. How am I billed? Rosecom shall bill you directly for all costs associated with your ADSL lines for internet access. You will be expected to pay in advance monthly, quarterly, or yearly your internet access charges. Bills for your other Telco service like faxes, and voice calls will be given to you separately by NITEL. 20. How should I choose between what types of connection to use? The decision to use either DSL or a dial up service depends upon the facilities offered by your Telco, DSL, or ISP when compared against another ISP offering a dial up services. The following are a few considerations when deciding what type of connection to use and who to use to provide your Internet access. · What Internet services do you want to use, such as email, web browsing, file transfers, etc.? · How much does the Internet account cost per month? · Are their costs for making a phone call to your ISP? · Does your ISP have any additional charges? · Does each service offer you sufficient email addresses? · Are you able to get personal web space? · Do you require additional phone lines to be installed? · Can the ISP be accessed through a local call?
Considerations might be the number of mailboxes that you are allowed, the amount of personal web space, is your Internet service a flat fee or is it a scalable charge depending upon the amount of data you transfer and the services you require. Firstly, it is a good ideal to decide what is important to you, then, which of the available providers is best suited to deliver those services. Rosecom.net shall provide you with the best options available and at the most cost effective price. 21. What is the point of having all this bandwidth available? Initially this service was designed with business in mind. It was meant for remote Local Area networks to be able to act seamlessly as one network. It was also designed for the person working from the home office to have rapid access to the network in order to maximize their productivity and time. The benefits of having this service are obvious. These services (i.e. vvvvvv, mail, FTP, etc) without being restricted by the long access and transfer times Imposed by ordinary analogue modem and ISDN lines is the service for you.
There is a cost to a Telco associated with deploying DSL but it is small compared with the cost of digging up roads to install cables. The cost of DSL is expected to drop once the new ADSL becomes widely available. There are also limits to the distance over which ADSL can be used, so that the user needs to be within a maximum distance of the Central Office. However, this can be improved on with the use of other media like fiber and relevant modems. Rosecom.net provides access to the internet via DSL modems and also through the modem dial- up with the availability of the Broadband internet access through ADSL service will not get what they want. Also the ADSL service is an option that will lower the cost of having access to the internet. Thereby, making internet access service more affordable for Nigerians Rosecom is offering this service through the NITEL telephone cable network.
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