LOCAL AREA NETWORK (LAN)
A form of networking technology that implements
a high-speed short distance method of computer
communications, such as in a department, office,
home or building. Most LANs connect together
multiple devices so that users can use, for
example, one printer or one set of applications
instead of having an individual printer or application
on each personal computer. LANs are capable
of transmitting data at very fast rates, much
faster than data can be transmitted over a telephone
line; but the distances are limited, and there
is also a limit on the number of computers that
can be attached to a single LAN.
The most common wiring
technology for a LAN is Ethernet, although wireless
technologies are evolving.
Benefits of LAN:
| • |
Information can be easily
shared allowing for quick and informed decisions
to be made, saving time and money. |
| • |
A more productive and competitive environment
is achieved through greater teamwork within
the organization. |
| • |
Network-based communication such as email
is considerably cheaper than using the phone
or fax and sharing resources such as printers
gives more efficient use of equipment at
lower costs. |
| • |
Standard versions of procedures and directories
can be made accessible to everyone. |
| • |
IT administration can be centralized.
|
| • |
Data can be backed-up from a single point
on a scheduled basis ensuring consistency.
|
| • |
Everyone is working from real-time shared
information and so reducing the risk of
error. |
Please call us at
9335607-10 or email us at sales@accesstel.net
for solution and pricing.
WIRELESS NETWORKING
Mobility is no longer
a barrier to productivity and efficiency but
now provides a true competitive advantage. Accessing
real-time data whilst at a client site, whilst
traveling or whilst working outside of normal
office hours now allows a more flexible and
efficient approach to business processes. Wireless
networking technology, fuelled by the emergence
of cross-vendor industry standards such as IEEE
802.11, has produced a number of affordable
solutions that are fast becoming a realistic
business benefit for all types of industries
where the installation of network cabling is
not practical. 802.11 A group of specifications,
developed by the Institute of Electrical and
Electronics Engineers (IEEE), for wireless networks
that are used to manage packet traffic over
a network and ensure that packets do not collide
- which could result in loss of data - while
traveling from their point of origin to their
destination. These are: 802.11, 802.11a, 802.11b
and 802.11g. Each access point typically covers
50-100 meters of open space with current specs
for 1, 2, 11 and 54 Mbps. It is intended to
provide for interoperability of wireless LAN
products from different manufacturers. For security
and privacy, 802.11 accommodates the use of
Wired Equivalent Privacy (WEP), a wireless authentication
protocol based on I.D. keys and bit-encryption.
| • |
Temporary
wireless networks can be easily set up for
temporary office facilities, exhibitions
and events. |
| • |
Easily scalable
and portable a wireless network access point
can be installed without the disruption
and costs associated with a cabled network
point. |
| • |
The wireless
network can be extended or moved to areas
where a cabled infrastructure wouldn't be
cost-effective or practical to do so (a
warehouse for example). |
| • |
Businesses
operating in listed buildings can adhere
to restrictions that may effect the installation
of a fixed-cable network. |
Benefits
of Wireless Networking:
• Reduction in total cost of ownership
as costs such as cabling and office space can
be radically reduced.
• Business processes can be improved and
the organization becomes more efficient as productivity
rises.
• Client meetings are more informed and
therefore more productive.
• Improving data availability, decision
making and account management processes will
improve client satisfaction.
• Geographical and time restrictions are
lifted, providing another competitive advantage.
• No need for training on new devices
as existing mobile devices can be used.
• Freedom and flexibility in where they
can work and when.
• Improved client account management away
from the office as real-time data can be made
available at the client site.
• Access to real-time data enabling more
efficient and informed decision-making.
Please call us at
9335607-10 or email us at sales@accesstel.net
for solution and pricing.
PRIVATE SECURED NETWORK
A Corporate Private
Secured Network is a data communications network
that spans a relatively large geographic area
e.g. linking LANs between offices city wide,
country wide or even worldwide. This system
makes use of public networks, such as the Internet
or dedicated communication lines and may be
privately owned or rented.
AccessTEL uses various
methods to connect clients multiple office locations
to establish the Private Secure Network. In
general AccessTEL will connect the central HQ
of the client in Dhaka through the AccessTEL
high capacity Fiber Optic Network. All branch
offices within Dhaka and greater Dhaka are usually
connected via the AccessTEL NLOS Wireless Network.
All branches of client outside Dhaka are connected
via Satellite Network. Having the ability to
use multiple modes of connectivity allows AccessTEL
to quickly, efficiently and cost effectively
establish the Private Secure Network for the
client.
Benefits
of a Private Secured Network:
| • |
Information
can be easily shared between multiple branches
of a corporation allowing for quick and
informed decisions to be made, saving time
and money. |
| • |
A more productive
and competitive environment is achieved
through greater teamwork across the organization.
|
| • |
Network-based
communication such as email is considerably
cheaper than using the phone or fax. |
| • |
Standard versions
of procedures and directories can be made
accessible and implemented across the organization. |
| • |
IT administration
can be centralized. |
| • |
Data can be
backed-up from a single point on a scheduled
basis ensuring consistency. |
| • |
Everyone is
working from real-time shared information
and so reducing the risk of error.
|
Please call us at
9335607-10 or email us at sales@accesstel.net
for solution and pricing.
VIRTUAL PRIVATE NETWORK
(VPN)
Although the AccessTEL
Broadband Network is a fully secured Network,
it is still advisable for clients to establish
security which they have full control over and
can manage independent of AccessTEL.
A Virtual Private Network
uses the public telecommunications network,
such as the Internet, rather than leased lines,
which are very expensive, to transport encrypted
traffic. VPNs are also recommended to secure
802.11b wireless LANs. The data being sent is
encrypted and cannot be intercepted, read or
otherwise interfered with. As VPNs use an existing
shared wide area network (WAN) infrastructure,
costs are lower and deployment is faster than
traditional networks built through leased lines.
A remote-access VPN can
provide connections for employees from various
remote locations. Remote workers can then dial-in
and use the VPN client software to access the
network. A site-to-site VPN provides connection
to and from multiple sites. This can be Intranet-
or Extranet- based. An Intranet-based VPN is
used to connect LANs within the organization,
whereas an Extranet-based VPN connects to other
organizations providing a shared environment.
Security:
IP Sec (Internet Protocol Security Protocol)
has two modes of encryption:
• Tunnel - encrypts the header and the
payload.
• Transport - encrypts only the payload.
AAA Servers (authentication,
authorization and accounting servers) are used
to increase security in a remote-access environment
and will carry out the following checks:
• Who the user is.
• What the user is permitted to do.
• What the user is actually doing.
Benefits
of VPN:
Cost Savings
The initial hardware investment may be slightly
higher than that of a traditional wired network
however the overall installation and operating
costs are significantly lower. So in the long
term the cost benefits outweigh the initial
investment. Organizations can also save money
by using home workers and contractors therefore
reducing training, infrastructure and hardware
maintenance costs.
Improved Productivity
| • |
Information can be easily
shared between office to office allowing
for quick and informed decisions to be made,
saving time and money. |
| • |
A more productive and competitive environment
is achieved through greater teamwork across
the organization. |
| • |
Network-based communication such as email,
chat, whiteboard, video conferencing is
considerably cheaper than using the phone
or fax. |
| • |
Standard versions of procedures and directories
can be made accessible and implemented across
the organization. |
| • |
IT administration can be centralized.
|
| • |
Data can be backed-up from a single point
on a scheduled basis ensuring consistency.
|
| • |
Everyone is working from real-time shared
information and so reducing the risk of
error. |
Please call us at
9335607-10 or email us at sales@accesstel.net
for solution and pricing.
