Bill Williams (IT): Support Site
[home]
|
[profile]
|
[register]
|
[help]
|
[Contact Us]
Revise: Broadband filters
Note: You must be registered in order to post a Topic or Comment.
To register,
click here
.
Note: Only the poster of this message, and the moderator can edit the message.
Your UserName:
Your Passkey:
Forgot your passkey?
[Click Here]
Subject:
Byline:
for Staff use.
Body Text:
For a guide to
embellishing
the text,
click
here
In a Dixons or PC world or other technical shop or from your ISP you should be able to buy one or more ADSL filters. They typically cost under a tenner each. The number you need altogether depends on whether you have phone extensions and how they are connected. [red]The actual rule is that the signal from a phone should pass through one and only one filter from the phone to your exterior phone line and similarly the ADSL device should pass through one and only one filter from the ADSL device to the exterior phone line. The ADSL signal cannot pass through the phone portion of a filter.[/red] In this context a phone connection includes a phone, a fax, a dial-up modem or a connection from your SKY satellite box to a phone line. You may see these called [b]POTS devices[/b]; which stands for Plain Old Telephone Services [:)]. You can have more than one POTS device connected to a phone line, but [b]you can have only one ADSL device[/b] connected to a phone line. ========= First let's identify some plugs as you will need to recognise them. [br][/br][imgl]/photos/adsl/BTplug.jpg[/imgl] This is a BT phone plug. Devised by BT when they thought they could still hold a monopoly on phone connections so it is different from the RJ11 phone plug used in the USA and many other places in the world. It has 4 or 6 wires. It is designed to 'snatch' out of the socket if you trip over a phone wire.[br][/br] [imgl]/photos/adsl/RJ11plug.jpg[/imgl] This is an RJ11 phone plug, as used for phones in the USA and many other places in the world. It has 4 wires. Since most broadband ADSL devices are designed to be used in the USA they usually {if not always} have RJ11 plugs and sockets to connect the broadband. In some ways this is convenient as in the UK you cant plug a phone or ADSL device into the wrong side of a filter. You may remember that when you used dial-up Internet, you had one of these plugs on the modem end of your connection wire.[br][/br][imgl]/photos/adsl/RJ45plug.jpg[/imgl] This is an RJ45 plug. It is similar in design to an RJ11 plug but is wider and has 8 wires. It is mainly used for Local Area Network [LAN] connections (called CAT5 or CAT5e), to connect computers to hubs or routers. However office buildings nowadays are often wired with what is called 'structured wiring', whereby all the signal wires are in place, using RJ45 outlet sockets and can be used for phones or computer networks. All the wires go to centralised patch panels from where they can be plugged into the relevant facilities. Phones with BT plugs need a little adaptor unit to allow them to plug into RJ45 structured wiring sockets[br][/br][imgl]/photos/adsl/RJ45plugMoulded.jpg[/imgl]This is another RJ45 Plug, which has a shroud moulded onto it for extra strength.[br][/br] An RJ11 plug can plug into the centre of the wider RJ45 socket, using the centre 4 wires. It is a bit wobbly sideways but normally connects OK. Revised on 15 May 2006
Check here to include your profile signature.
Check here Remember Details.
Go to Home Page