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ADSL
PC Docs is now offering broadband access specifically designed for SME's. At competitive
prices with speeds up to 2mbs, four times as fast as existing broadband suppliers
and a FREE static IP address, we believe we have the ideal package for you.
Static IP Addresses
|
1 IP address |
FREE! |
|
8 IP addresses (No NAT - 5 usable) |
£80.00 one-off |
|
16 IP addresses (No Nat - 13 usable) |
£160.00 one-off |
FAQ
What is ADSL?
ADSL (Asymmetric Digital Subscriber Line) is always on broadband service delivered
over a standard BT PSTN analogue line.
What speeds does ADSL run at?
PC Docs offer ADSL at the following speeds:-
- Download: 512kb Upload: 256kb
- Download: 1mb Upload: 256kb
- Download: 2mb Upload: 256kb
Please note all ADSL circuits are subject to a contention ratio (See next FAQ).
What is a contention ratio?
Contention ratio refers to the maximum number of users you could be sharing your
bandwidth with. PC Docs uses the lower contention ratio of 20:1. If you have a 20:1
contention ratio then in theory another 19 users could be competing for the 512kb
you have. In practice this very rarely happens and even on the slowest ADSL product
users typically see a 10x improvement over a 56k modem.
Why is the download speed greater than the upload speed?
ADSL is Asymmetric which means it runs at different speeds for upload and download.
BT is currently trialling a SDSL (Symmetric Digital Subscriber Line) service which
runs at the same speed for both upload and download.
What type of phone line is required for ADSL service?
A standard BT PSTN analogue line is required for ADSL. Certain BT services and/or
configurations are NOT compatible with ADSL, these include:-
- PBX Switchboard
- ISDN 30(PRI)
- Surftime
- BT Data Stream
- BT Video Stream
- None BT Telephone Line
- Redcare Alarm Monitoring
- Pulse Metered Line
- Coin/Pay Phone
It is possible to convert a ISDN 2/2e or Business/Highway line into ADSL. This does
however mean that the ISDN service is lost as the line has to be converted back
to a single analogue line. Certain fax machines will interfere with the ADSL signal
so it is not recommended that you use a fax line for ADSL.
What is the minimum contract term for ADSL?
The minimum term is 6 months and there is a 1 month notice period to cancel.
What payment methods are available?
You can use credit/debit card or cheque to pay the initial installation and first
month/quarter charges. After that all subsequent charges are payable by direct debit.
What is NAT/No-NAT?
NAT (Network Address Translation) is a technology that allows you to share a single
IP address assigned by a ISP among a number of computers on a LAN. Most ADSL hardware
supports NAT out of the box. N0-NAT means that instead of having a single IP address
to share you get a subnet of 8 or 16 IP's that are routable and can be assigned
to your computers. Please note that because a subnet is assigned it means you do
not have access to all the 8 or 16 IP addresses. On a 8 IP connection 5 IP addresses
are available to you and on a 16 IP connection 13 IP addresses are available. This
is because a IP is reserved for the network address, broadcast address and router
respectively.
Do you assign fixed IP addresses?
Yes, all PC Docs ADSL accounts come with one fixed IP address on both NAT and No-NAT.
Additional IP addresses can be obtained. (See prices above)
What is a microfilter?
A microfilter, sometimes referred to as a 'splitter', is an adapter that plugs into
the telephone socket the ADSL service is provided on. The microfilter separates
the ADSL signal from the voice signal. You plug your phone and your ADSL hardware
into the microfilter and the microfilter into the BT phone socket.
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