Transcript SME Presentation

The Internet for SME’s
What is ADSL?
• Asymmetric Digital Subscriber Line (ADSL) is highspeed digital connectivity over the existing,
copper (or analogue) 'local loop' circuit. It
enables Service Providers to deliver high-speed
services such as Video, Audio and Internet
directly to the consumer utilising the existing
copper lines without resorting to laying more
expensive lines such as fibre optic cable.
Customers will still be able to use their existing
telephones whilst enjoying the higher speed
digital connectivity.
• The circuits are described as asymmetric
because most of the bandwidth is used to offer
fast 'downstream' speeds to the end-user whilst
the remainder is used for 'upstream' data back to
the Service Provider. The service is permanently
connected or 'always-on' and is usually charged
at a flat rate regardless of time on-line or data
used.
When is it available?
• Depending on your location, within 7
days.
• Most large towns are now ADSL ‘live’
• 99.8% of the UK will be ‘live’ by the end
of 2005
Can I share the connection
between computers?
• Yes - ADSL is ideal for connecting an
office network to the internet. Connect
your network to the ADSL router and all
network machines will be able to access
the internet.
• There is no need to buy expensive
hardware. £40 is enough to share
between 4 computers
How does ADSL compare with
fixed leased lines and ISDN?
• A fixed leased line guaranteed
bandwidth, in both directions, and is
therefore suitable for any application
that is expected to deliver consistent
high-speed performance. However this is
expensive.
• ADSL is 8 times faster than ISDN in its
standard form
• Unlike ISDN, ADSL has no call charges
associated with data traffic.
• Basic sites can be hosted on Leased lines
and ADSL, but not ISDN
What hardware do I need to
buy?
• BT standard phone line and account
• A dedicated wall mains socket for the
Router
• A PC with the following minimum
specification is recommended:
Windows 98SE, Pentium 200 MHz MMX
processor, 32 MB System memory, 1mb
graphics card and a USB or Ethernet port
• You need a router for sharing between
multiple computers, and switches if you
intent to use more than 4.
• A server is needed if you are going to
host a basic site. This needn't cost more
than £300
Will I still be able to use my existing
phone connections and equipment?
• Yes - you can use a telephone on the
same line as the ADSL service - and while
you are using the internet! ADSL requires
a micro-filter to be connected to the line
- the filter has outputs for both ADSL
connections and standard telephones.
How fast will it go?
• BT ADSL is provided up to 2mbit. This
means a 1MB download will take 8
seconds
• Areas of the south and London can
receive 8mbit ADSL. This means a 1MB
download will take 1 second.
• Cable speeds vary greatly and are
subject to speed losses when near by
homes and business are using the
connection; due to the way the network
is designed.
How much will it cost?
• All ADSL products carry a £50 + VAT
setup charge
• Business ADSL 512k/sec - £32 + VAT
• Business ADSL 1024k/sec - £52 + VAT
• Business ADSL 2048k/sec - £82 + VAT
ADSL is suitable for businesses who
download more than they upload
How much will it cost?
• All SDSL products carry a £450 + VAT
setup charge
• Business SDSL 512k/sec - £150 + VAT
• Business SDSL 1024k/sec - £222 + VAT
• Business SDSL 2048k/sec - £340 + VAT
SDSL is useful for businesses who need to
upload a lot of data, for example if they
are hosting a website from the office
Is an always on connection
secure?
• NAT (Network Address Translation) is a process
whereby the ADSL router has a single, real, RIPE
registered, IP address assigned to it. The PC's on
your network are allocated IP's in the reserved
range for private networks (10.x.x.x), either
manually, or via DHCP.
• Using NAT makes your connection more secure,
as the casual intruder into your network will only
be able to access the router, and not your
internal network. However, the ADSL router does
not have a specific firewall included with it, and
NAT is not completely resilient to all types of
attacks.
• Also, if you wish to use SMTP to receive mail, or
host servers on your LAN for external access (e.g.
a website), then you cannot use NAT. If this is the
case, then you should buy a hardware firewall.
How do I make my website
secure for payments?
• Secured Sockets Layer is a protocol that
transmits your communications over the
Internet in an encrypted form. SSL
ensures that the information is sent,
unchanged, only to the server you
intended to send it to. Online shopping
sites frequently use SSL technology to
safeguard your credit card information.
• To use SSL you need a trusted root
certificate. These typically cost around
£200 from Verisign
Meanwhile
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