These types of connections are “always on”. You
do not require a modem or a phone line to connect to internet.
They are normally connected through cable wires. Here we discuss
different type of Non Dial up Connections.
(Integrated Services Digital Network) is usually considered
the next speed step above a dial up connection using a 56K
modem. The difference in internet access speed is remarkable.
Using ISDN service you can connect or disconnect the service
just like the dial up service. An ISDN connection has to be
activated to access internet. Hence some people do not consider
ISDN as a true "always on" connection. However,
ISDN consists of fully digital circuits that run at 128K.
Therefore, it quickly establishes a connection to your service
provider when you access the Internet.
Usually ISDN have a fix monthly or quarterly or annually
fixed rate. Some ISDN
providers may charge you minute for the time you spend
connected to the Internet. ISDN is considered as a outdated
technology. DSL, a faster, more inexpensive alternative seems
to be taking its place quickly in market.
Speed: 64Kbps to 128Kbps
Hardware Requirements: One ISDN router and network cards for
the PCs for connecting multiple computers.
Monthly Cost: Starts at per month or per minute charges; depending
1. Does not tie up a phone line
2. Wide availability
3. Usually faster than a 56k modem
4. Can also be used for voice communication
1. ISDN may be found difficult to setup
2. Outdated (compared to DSL)
3. Per minute charges can make it costly when a lot of internet
excess is requirement.
4. Many times speeds do not measure up to expectations
5. Connections are not "always on"
6. Limited expandability, not practical for more than 8 to
10 computers (depends on usage and number of computer connected
for speed of access)
7. ISDN can be problematic to troubleshoot.
8. Generally, ISDN does not allow for the hosting of a Web
server for your nonprofit.
2. Frame Relay
Frame relay is a connection to the Internet that is owned
by the telephone company. They are shared by many users mostly
their customers. Frame relay ISPs provide a Committed Information
Rate for the minimum transmission speed they will guarantee
to provide all the time. Higher transmission speeds may be
availed for some time. Overall, Frame Relay is a very reliable
and stable technology that can be used for direct connections
to service providers or building wide area networks between
Monthly Cost: depends on the provider
Speed: 64Kbps 1.54Mbps
Hardware Requirements: One router and one CSU/DSU.
1. Easy to install
2. Reliable and fast Internet connection
3. Steady speed
4. Supports WAN connections
1. Expensive option for speeds similar to DSL
2. Shared by several users
DSL is used to describe several types of DSL (Digital Subscriber
Line) technologies, including Asymmetrical Digital Subscriber
Line (ADSL). This type of internet connection provides different
upload and download speeds and is most popular with consumer
customers. A type of DSSL connection, Symmetrical Digital
Subscriber Line (SDSL), provides the same speed in both directions.
SDSL is most popular with businesses and larger nonprofits.
In recent years, the DSL market really took off in many urban
areas in UK. The level of service in different areas can vary
greatly per DSL providers.
Monthly Cost: varies per provider.
Speed: 128Kbps to 1.5Mbps
Hardware Requirements: DSL modem for individual connection.
A DSL router is required for connecting multiple computers
with network cards for the PC installed.
1. Affordable for most consumer customers
2. Wide variety of speeds, but still faster then its ancestors.
3. Wide range of choice of service providers
1. Available only in limited areas
2. Speed can vary widely and some time hits very low.
3. You must be within 200 meters or so from the switching
site to get good speed. The farther away you are, the lower
the speed you get.
Cable connects are provided through a coaxial cable, often
using the same line that carries your cable TV service. Cable
connections are heavily marketed in home users. Many consumers
go for DSL or the bigger budget to get leased line. Cable
connections offer relatively high connection speeds mostly
1 to 2 Mbps, at relatively low costs. The connection can be
shared one and slower speeds can be a common occurrence if
consumption is more. Also, the cable company will usually
only provide one IP address making it necessary to purchase
a router to share the connection. This is not a practical
option for LANS.
Monthly Cost: varies per provider.
Speed: 500 Kbps to 2 Mbps
Hardware Requirements: Cable Modem, Might need cable router
to share connection.
1. Wide availability
2. Relatively inexpensive
1. Sharing with neighbors poses some unique security risks
and congestion problems
2. Router required for more than one computer
3. Primarily for home users
4. You generally can not host web sites on cable connections.
For rural users or people that don't have DSL in their area,
Satellite connectivity is becoming a more and more viable
alternative for high-speed Internet access. Recently companies
have initiated two-way internet access through satellite getting
rid of their one-way setups. Earlier one way setups required
the use of an analog modem for making requests Satellite connection
is still slower than land-based solutions like DSL or frame
relay due to the high latency times. Latency time is the amount
of time taken to transmit to satellite, ISP, web site and
back again to end user. Connection speeds may seem slower
than advertised due to this lag. Overall they are still definitely
an improvement over dial-up.
If you are interested in two-way satellite connectivity and
you have multiple PCs at your organization, it might be worthwhile
to talk to a “value-added reseller” (VAR) of Hughes
DirecPC about one of their small business solutions. These
solutions usually include a server that performs several functions,
easing networking headaches and improving performance through
For home consumer solutions:
Speed: Downstream up to 400 Kbps; upstream is usually limited
to a maximum of 128Kbps
Hardware Requirements: One satellite dish and satellite modem
You can access the Internet anywhere that you have a clear
Available almost everywhere
1. Upload speed is not nearly as good as download speed
2. Very little competition
3. Heavy users of bandwidth are often impacted by “fair
access policy” that limits use
4. The high latency and asymmetrical nature of the connection
makes it inconvenient for hosting web sites
5. Satellite connections can occasionally be affected by inclement
For small business solutions:
Monthly Cost: depends on number of connections, Server based
configurations can be more expensive.
Speed: Download speed up to 500 Kbps
Upload is usually limited to a 128Kbps
Hardware Requirements: One satellite dish and one satellite
modem plus installation. Server based configuration is better
solutions for more than 5 users.
1. You can access the Internet anywhere that you have a clear
2. Available almost everywhere
3. Small business solutions make it easier to share satellite
connection and can also add features or equipment that enhance
1. Even with small business solutions, not ideal for Web hosting
2. Upload speed is not nearly as good as download speed
6. Leased Line connections
For large organizations with big budgets for internet connections,
a leased line can be used to connect the whole office to the
Internet. It is a private, dedicated line that goes directly
from your office to your Internet Service Provider (ISP).
If you do not need that much speed, you can purchase a shared
leased line. This line split into segments and divided among
users. Leased lines provide high bandwidth, since they are
not shared with other users.
Monthly Cost: Varies per provider
Speed: 64Kbps - 1.54Mbps
Hardware Requirements: Two routers and two CSU/DSU s. Your
ISP may provide one router and one CSU/DSU.
1. Very fast
2. Higher level of security and guaranteed bandwidth
1. Restricted availability
2. Very expensive for home uses and even for small businesses
For organizations that need the fastest available connection
to the Internet, a leased line connection is also available
at faster speed (40 to 45Mbps) or shared connection speed
(3Mbps onwards). This type of line is used by smaller ISP
Monthly Cost: relatively expensive, depends on the provider
Speed: 3Mbps to 45Mbps
Hardware Requirements: Two routers.
1. Extremely fast
1. Not available everywhere
2. Extremely expensive
7. Fixed Wireless
Fixed Wireless uses unlicensed radio bandwidth to transmit
data between your organization and your service provider.
It is possible to transmit over long distances. The speeds
can be high, usually over 10Mbps and cost considerably less
than the equivalent wired version. However, the initial set-up
costs can be very expensive depending on the equipment that
your ISP requires.
Monthly Cost: depends on speed or number of computers attached.
Speed: from 256Kbps up to 10 Mbps
Hardware Requirements: Antenna, receiver/transmitter, network
device, lightning arrestor, possibly tower. These costs can
vary widely based upon what capabilities the system possesses.
A basic setup can be as little as $200 while a more advanced
setup can run several thousand dollars or more.
1. Extremely fast
2. Good bandwidth
3. Covers long distance
4. Relatively economic
1. Possible expensive initial costs
2. Limited availability
All type of internet connections have their advantages and
disadvantages. It is up to you to choose the right internet
connection for you…