907 lines
33 KiB
HTML
907 lines
33 KiB
HTML
<HTML
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>Installation</TITLE
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>DSL HOWTO for Linux</TH
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="INSTALLATION">2. Installation</H1
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><P
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> Before actually ordering service, there are several things you may want to
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explore. Please note, that there are many ways any given telco might
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decide to handle qualification and installation procedures. Much of what
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is described in this section, is how it is commonly done in the U.S.
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</P
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN275">2.1. Pre-Installation</H2
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><P
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> In many parts of the world, there is no choice on who you get DSL from: your
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friendly local telco, of course! They own the copper wires, and thus they
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hold all the cards. </P
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><P
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> However, in the U.S. de-regulation has opened this up somewhat. Beyond the
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obvious consideration of price, there are reasons to investigate which
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alternate providers may be offering DSL services in your area. The large
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Telephone companies are everywhere, and may advertise the most. But
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increasingly smaller ISPs and independents are getting into the act. This has
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created some diversity in the DSL marketplace. A good thing of course, but
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possibly creating a little confusion too. Conversely, in areas where there
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is only one choice, then we have no choice but to accept whatever service
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is being offered. </P
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><P
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> If your telco has a monopoly on phone service and DSL, you may skip the
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rest of this section. And probably the next few sections. They will probably
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control the installation and qualification processes, and you just wait
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for them to get finished.</P
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><P
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> Not all DSL services are alike. Just because two local companies are offering
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<SPAN
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CLASS="QUOTE"
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>"ADSL"</SPAN
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>, does not mean that necessarily there is much in common
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at all. In fact, there are potentially a number of factors that make one ADSL
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provider's service significantly different from another's. Some things to
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consider:
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</P
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><P
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> <P
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></P
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><UL
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><LI
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><P
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> Speed vs Price.
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</P
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></LI
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><LI
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><P
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> What hardware is provided, i.e. modem or router. It is best if this is
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external ethernet in either case.
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</P
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></LI
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><LI
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><P
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> The ISP's Network architecture. PPPoX? Static IP? Servers allowed?
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</P
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></LI
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><LI
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><P
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> Is it an <SPAN
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CLASS="QUOTE"
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>"always on"</SPAN
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> service, at least theoretically? Are
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there supplemental usage fees, or idle timeouts?
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</P
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></LI
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><LI
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><P
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> Linux friendly, Linux hostile, or Linux agnostic? This is not as much of
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a problem as it used to be in most areas. Some providers are still very
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restrictive on allowing <SPAN
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CLASS="QUOTE"
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>"servers"</SPAN
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>, and possibly even
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LAN connections. Buyer beware. Talk to other users, and read their
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TOS (Terms of Service) to get a feel for their attitude.
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</P
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></LI
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><LI
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><P
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> Quality of service. How is news, mail, etc.? News particularly seems
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to be inconsistent with low-end broadband providers. Probably because
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of the dramatic increase in binary news content, which is compounded by the
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higher bandwidth and increased usage of such groups.
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</P
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></LI
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></UL
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></P
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><P
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> For a more lengthy discussion on some of these considerations and related
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issues, see the <A
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HREF="overview.html"
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>DSL Overview</A
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> appendix for
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more on <A
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HREF="overview.html#DSLMODEMS"
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>modems</A
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>,
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<A
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HREF="overview.html#QUALIFY"
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>qualifying for service</A
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>, and
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<A
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HREF="overview.html#CPROVIDERS"
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>choosing a provider</A
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>.
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</P
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><P
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> Once you have chosen a provider, and ordered service, the next step is for
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the telco to <SPAN
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CLASS="QUOTE"
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>"qualify"</SPAN
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> your loop. This essentially means testing
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your line to make sure it can handle the DSL signal, and possibly what level
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of service may be available to you. This may take some time, especially if
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the telco encounters problems with the loop. If no problems are found during
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this phase, then possibly there will be a one to three week wait for the
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installation. YMMV.
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</P
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><P
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> After the telco has qualified the loop and readied their end of the
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connection, the next step is installation of the necessary components at the
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customer's end of the connection: wiring modifications, splitter or filters,
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and, of course the modem and any necessary software. </P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN306">2.2. Installation Options -- Self Install or Not</H2
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><P
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> You may or may not have a choice on how the installation is done, or who
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does it. This is totally at the discretion of the provider. In much of the
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world, this is done by the telco, and there is little flexibility. Many
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providers in the U.S. offer a <SPAN
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CLASS="QUOTE"
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>"self install"</SPAN
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> option where you do
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all the work. In this scenario, the provider will send a kit in order to save
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them from sending a tech, and thus reducing cost. Typically, self install
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kits will include microfilters for the POTS (Plain Old Telephone Service)
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or ISDN (where ADSL over ISDN is used) phone jacks, the modem (and
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maybe a NIC), and a CDROM with drivers, etc. on it. In some cases, a splitter
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may be included instead of microfilters. In any case, some type of filtering
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is necessary on the non-DSL lines. If not the noise generated by the DSL
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signal may interfere with regula telco devices such as phones and answering
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machines. </P
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><P
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> The other possibility is for the provider to do the installation. Again, this
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may be your only option. Obviously, the cost is higher here, but it may have
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the advantage of having a trained tech do any wiring. There is also a better
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chance of getting a <SPAN
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CLASS="QUOTE"
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>"splittered"</SPAN
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> installation with this option
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(a good thing!). Another benefit is that if something is wrong with the line,
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or the telco has not provisioned the line properly, an on-site tech may be
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able to help sort out certain kinds of problems quickly. </P
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><P
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> The self-install kit should come with full instructions, regardless of whether
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the installation will be splittered or filtered. So we won't go into much
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detail on this aspect.
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</P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="AEN313">2.3. Wiring/Installation Options</H2
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><P
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> There are various wiring schemes depending on how your service is being
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provided, who is providing it, and which DSL service is being provided.
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If your telco is performing the installation, you may skip this section.
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</P
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><P
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> <P
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></P
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><UL
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><LI
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><P
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> <EM
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>Dedicated Line</EM
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>. Some DSLs require a dedicated, or
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<SPAN
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CLASS="QUOTE"
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>"dry"</SPAN
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>, wire pair, e.g. IDSL. This means a separate, physical
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line without dial-tone for DSL and Internet connectivity. Also, DSL
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services from CLECs (independent telcos like Covad), may use a
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dedicated line, depending on their line sharing agreement with the local
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incumbent carrier. (Instead the CLEC will actually lease a loop from the
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ILEC.) On your end, this simply means using one of the unused wire pairs
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in the telco wire bundle, and connecting it to the DSL jack.
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</P
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></LI
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><LI
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><P
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> <EM
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>Shared Line with Splitter</EM
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>. For DSLs like ADSL, that
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are provided over the same line as regular voice service, the signal
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must be filtered somehow so that voice services are not adversely effected.
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Installing a splitter splits the line into two pairs, and filters the DSL
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signal from one of them. This results in a inside wiring scheme where DSL
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goes to only one jack, and then regular voice type service to all other
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jacks. This is considered by many to be a better type of installation than
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<SPAN
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CLASS="QUOTE"
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>"splitterless"</SPAN
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>, i.e. with microfilters instead. See below.
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</P
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><P
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> Splitters are available from various manufacturers and come in various
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shapes and sizes. Some are small enough to fit in the NID itself (sometimes
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called SNI, this is the telco phone box on the outside of your house),
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while others have a housing as large as the NID itself. Typically this is
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mounted near the NID, on the customer's side of the demarcation point.
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</P
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></LI
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><LI
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><P
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> <EM
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>Shared Line with Filters</EM
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>. Again, for some DSLs that
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piggyback on the POTS (or ISDN) line, the signal must be filtered or split at some
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point. This is not necessary for g.lite or RADSL however. The other way of
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doing this is by placing RJ11 <SPAN
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CLASS="QUOTE"
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>"microfilters"</SPAN
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> in each phone
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jack -- <EM
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>except where the DSL modem will be</EM
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>. These
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filters are relatively small, plug-in devices and remove the higher
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frequencies associated with DSL. This is obviously much easier since no
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tools or wiring is required. This is often what is included in self-install
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kits, and is often referred to as a <SPAN
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CLASS="QUOTE"
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>"splitterless"</SPAN
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>
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installation. This is a very common approach in the U.S. Note that
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in areas where ADSL over ISDN is provided, filtering is required
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also, but the filters themselves are quite different and are not
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interchangeable with POTS filters!
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</P
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><P
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> Similar microfilters are sometimes used by some telcos to reduce the
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excessive <SPAN
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CLASS="QUOTE"
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>"whine"</SPAN
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> on the line that is produced by some modems.
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This is a little different approach as the filter is put on the same
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jack as the modem.
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</P
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></LI
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><LI
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><P
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> <EM
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>Shared Line, Splitterless and Filterless</EM
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>. Some newer
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DSLs, like G.Lite, have no adverse effect on regular POTS devices and thus
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require no filters or splitters. This would seem to be the wave of the
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future. Just plug and play. Though still not very common.
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</P
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></LI
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></UL
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> </P
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><H3
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CLASS="BRIDGEHEAD"
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><A
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NAME="AEN338"> Figure 1: DSL Block Diagram with Splitter (NID not shown)</H3
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><P
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> <TT
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CLASS="LITERAL"
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> <P
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CLASS="LITERALLAYOUT"
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><br>
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<--------Home/Office-----><---Loop---><--Central Office--><br>
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<br>
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POTS X-------+<br>
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phone, | <br>
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fax, | <br>
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etc, | <br>
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| CO<br>
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| -------<br>
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| | |<br>
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| | |<br>
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| ----- | |<br>
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POTS X-------+----Voice--=| S | | D |<br>
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| P | | S |=- Voice Switch<br>
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| L | 2 wire | L |<br>
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| I |=------------=| A |<br>
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| T | Local Loop | M |=- ISP --> INET<br>
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--------- | T | | |<br>
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Linux X--=| Modem |=-Data-=| E | | |<br>
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--------- | R | | |<br>
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----- | |<br>
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-------<br>
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<br>
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</P
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>
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</TT
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></P
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><H3
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CLASS="BRIDGEHEAD"
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><A
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NAME="AEN343"> Figure 2: DSL Splitterless (a.k.a. filtered) Block Diagram</H3
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><P
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> <TT
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CLASS="LITERAL"
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> <P
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CLASS="LITERALLAYOUT"
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><br>
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<--------Home/Office-------><----Loop---><--Central Office--><br>
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<br>
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<br>
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POTS X--Voice---[RJ11]------+<br>
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phone, (filter) | <br>
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fax, D CO<br>
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etc, a -------<br>
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t | |<br>
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a | |<br>
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POTS X--Voice---[RJ11]----- & | D |<br>
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(filter) V ----- | S |=- Voice Switch<br>
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o | N | 2 wire | L |<br>
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i-=| I |=-----------=| A |<br>
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c | D | Local Loop | M |=- ISP --> INET<br>
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e ----- | |<br>
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----------- | | |<br>
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Linux X--=| Modem |=-------| | |<br>
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----------- -------<br>
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<br>
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<br>
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</P
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>
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</TT
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></P
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></DIV
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><DIV
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CLASS="SECT2"
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><H2
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CLASS="SECT2"
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><A
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NAME="WIRING">2.4. Self Install - Wiring</H2
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><P
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> If you are not doing a self-install, then you may skip this section
|
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and move to <A
|
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HREF="configure.html"
|
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>Configuring Linux</A
|
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>. If you are
|
|
doing a self-install with microfilters, skip to the
|
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<A
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HREF="installation.html#MICRO"
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>mircofilter section</A
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>. The following procedures
|
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are meant to illustrate the wiring process. Please note that your procedures
|
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may be different at your location. Make sure you follow any warnings or
|
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safety instructions provided, that you RTFM, and that you are familiar with
|
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telco wiring procedures. </P
|
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><P
|
|
> The first step will be to wire up the connections from your provider. Identify
|
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the line on which service will be installed, and the locations of your
|
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splitter and DSL jack(s). (For perhaps a better wiring scheme, see the
|
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Homerun section immediately below.)</P
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><P
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> Be aware that typical telco wire has more than one pair per bundle. Often,
|
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two pairs, but sometimes more. If you have but one phone line, the other
|
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pair(s) are unused. This makes them available for use with wiring for DSL.
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Wire pairs are color coded for easy identification. SDSL and IDSL require a
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dedicated, or <SPAN
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CLASS="QUOTE"
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>"dry"</SPAN
|
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>, pair. If an unused pair is available, then
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no real re-wiring is required. It is just a matter of re-wiring an existing
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jack for the correct pair of wires, and attaching the modem. </P
|
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><DIV
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CLASS="SECT3"
|
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><H3
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CLASS="SECT3"
|
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><A
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NAME="HOMERUN">2.4.1. The Homerun</H3
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><A
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NAME="AEN358"><TABLE
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BORDER="0"
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WIDTH="100%"
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CELLSPACING="0"
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CELLPADDING="0"
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CLASS="BLOCKQUOTE"
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><TR
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><TD
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WIDTH="10%"
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VALIGN="TOP"
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> </TD
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><TD
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WIDTH="80%"
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VALIGN="TOP"
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><P
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>
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<SPAN
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CLASS="QUOTE"
|
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>" <EM
|
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> I would not use microfilters if I lived across the street from my CO. A
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splitter is the only way to go.
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</EM
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>
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"</SPAN
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>
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</P
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></TD
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><TD
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WIDTH="10%"
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VALIGN="TOP"
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> </TD
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></TR
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><TR
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><TD
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COLSPAN="2"
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ALIGN="RIGHT"
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VALIGN="TOP"
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>--<SPAN
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CLASS="ATTRIBUTION"
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>A retired BellSouth ADSL installer</SPAN
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></TD
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><TD
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WIDTH="10%"
|
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> </TD
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></TR
|
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></TABLE
|
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><P
|
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> The optimum method of wiring for the DSL modem is sometimes
|
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called a <SPAN
|
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CLASS="QUOTE"
|
|
>"homerun"</SPAN
|
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>. It is called this because it is one,
|
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straight shot from the splitter to the modem's DSL jack. What this does is
|
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bypass the existing inside wiring altogether, and any problems that might be
|
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lurking there -- like a corroded connection somewhere on a voice jack. Inside
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wiring deficiencies can cause a degradation of the DSL signal. </P
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|
><P
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>
|
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This also allows you to route the cable to avoid any potential
|
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RFI (Radio Frequency Interference) sources. RFI anywhere in the
|
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circuit can be a DSL killer. Routing the cable away from items that
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may have electric motors, transformers, power supplies, high
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intensity lighting fixtures, dimmer switches and such, is a smart way
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|
to go. And you are also less likely to have a failing microfilter
|
|
cause problems -- one potential point of failure instead of several. You can
|
|
also use a better grade of cable such as CAT 5. </P
|
|
><P
|
|
> If your existing installation is <SPAN
|
|
CLASS="QUOTE"
|
|
>"splitterless"</SPAN
|
|
> (i.e. using
|
|
microfilters) now, converting to a homerun will entail purchasing a splitter.
|
|
And, of course, will also mean some new wiring will need to be run.
|
|
Microfilters also add to the effective loop length -- as much as 700 ft per
|
|
filter in some cases! So if you have several microfilters installed, and your
|
|
sync rate or distance is marginal, eliminating these filters may result in a
|
|
significant improvement. </P
|
|
><P
|
|
> A poor man's splitter can be rigged by using a microfilter inside the NID.
|
|
This is not <SPAN
|
|
CLASS="QUOTE"
|
|
>"by the book"</SPAN
|
|
>, but seems to work just fine for many.
|
|
</P
|
|
></DIV
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="AEN370">2.5. Wire the Splitter</H2
|
|
><P
|
|
> If you have the splitterless design (i.e. using <SPAN
|
|
CLASS="QUOTE"
|
|
>"microfilters"</SPAN
|
|
>)
|
|
or a dedicated line, you may skip this part. </P
|
|
><P
|
|
> The splitter will typically consist of two parts, the splitter and a small
|
|
outdoor housing. Mount the splitter and accompanying housing per the telco's
|
|
instructions at the Network Interface Device (NID) point (also sometimes
|
|
called the SNI or ONI), usually the side of your house where the phone line
|
|
is located. Put it on your side of the NID. The phone company may need
|
|
to access the splitter for maintenance, so its advisable to locate it on the
|
|
outside where they can get at it, but outside is not absolutely
|
|
necessary. </P
|
|
><P
|
|
>
|
|
The wire bundle should have at least two separate wire pairs. The splitter
|
|
takes one pair, and separates the signal onto two pairs. One pair in the
|
|
bundle will then go to all phone jacks, and the other to the modem's DSL wall
|
|
jack. So connect the incoming telco line to the LINE side of the splitter.
|
|
Then wire the inside pair for your telephone to the VOICE, and your inside
|
|
wire pair for the modem to DATA. </P
|
|
><P
|
|
> <EM
|
|
>Checkstep </EM
|
|
> At this point, you should be able
|
|
to pull dial tone off the voice side of the splitter. If this doesn't work,
|
|
then you've wired it wrong. You can also plug the modem into the test jack in
|
|
the NID box (most should have this). Plug in the modem's power cord, and
|
|
if the line is provisioned correctly, you should <SPAN
|
|
CLASS="QUOTE"
|
|
>"sync"</SPAN
|
|
> in less
|
|
than a minute. This test only requires the modem. (Internal and USB modems
|
|
will require a driver to be loaded before syncing. This would mean having the
|
|
computer there too.) </P
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="AEN379">2.6. Wire the DSL Jack</H2
|
|
><P
|
|
> Wire the DSL wall jack (RJ11) at your computer location, which should already
|
|
be connected to the DATA side of the splitter. The specifics differ for each
|
|
situation, but basically you will have a wire pair that you will connect to
|
|
the DSL jack. Make sure you <EM
|
|
>read the directions</EM
|
|
>, as the
|
|
DSL-RJ11 wiring may be different for phones and DSL jacks.
|
|
<EM
|
|
>AND</EM
|
|
> -- different modems may expect the signal on
|
|
different pairs -- most on the inside pair, but some on the outside pair. </P
|
|
><H3
|
|
CLASS="BRIDGEHEAD"
|
|
><A
|
|
NAME="AEN384"> Figure 3: RJ11 Wiring options </H3
|
|
><P
|
|
> <TT
|
|
CLASS="LITERAL"
|
|
> <P
|
|
CLASS="LITERALLAYOUT"
|
|
> <br>
|
|
||<br>
|
|
||<br>
|
|
||<br>
|
|
/ \<br>
|
|
|RJ11| <br>
|
|
| | <br>
|
|
----<br>
|
|
||||<br>
|
|
<br>
|
|
^^ <-- Inside Most modems on inside pair<br>
|
|
^ ^ <-- Outside Some on outside, e.g. Alcatel 1000, SpeedTouch Home<br>
|
|
<br>
|
|
</P
|
|
>
|
|
</TT
|
|
></P
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="MICRO">2.7. Installing Microfilters</H2
|
|
><P
|
|
> Pretty much a no-brainer here. If you are doing a
|
|
<SPAN
|
|
CLASS="QUOTE"
|
|
>"splitterless"</SPAN
|
|
>, self-install installation, then install the
|
|
provided microfilters in all phone jacks <EM
|
|
>except</EM
|
|
> the one
|
|
where the DSL modem will be connected. Don't forget devices like fax machines
|
|
and analog modems. The filters filter out the higher DSL frequencies and will
|
|
keep the DSL noise from interfering with POTS (or ISDN) equipment. </P
|
|
><P
|
|
> <EM
|
|
>Warning!</EM
|
|
>
|
|
Alarm systems can present various problems, depending on the type of alarm
|
|
and how it is installed. This may require telco help for proper installation
|
|
so the one does not interfere with the other. Common microfilters tend not to
|
|
work because most alarm boxes use a different size jack. Filters are now
|
|
available just for alarm boxes, though traditionally this has been handled
|
|
with a splitter type installation.</P
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="AEN396">2.8. Installing an Ethernet Modem</H2
|
|
><P
|
|
> To install, connect the modem's (or router's) power cord, and connect
|
|
the phone line between the DSL wall jack and the modem. This cable should be
|
|
provided. If not, a regular phone cord will suffice. With the ethernet
|
|
interfaced modems, you may also connect the ethernet cable between the NIC
|
|
and the modem (but not really necessary at this point just to verify an
|
|
ethernet modem is working). </P
|
|
><P
|
|
> <EM
|
|
>Checkstep </EM
|
|
> At this point, verify that
|
|
the modem syncs with the telco's DSLAM signal. Most modems have a
|
|
green LED that lights up when the signal is good, and red or orange
|
|
if not in sync. The modem's manual will have more details on the
|
|
LEDs. If it doesn't sync, then check your wiring, or make sure that
|
|
the DSL signal is being sent. Do this by calling your telco and
|
|
verifying they have activated the service. Or by testing the modem at
|
|
the test jack on the NID (see above). Note that having dial tone
|
|
on the line does NOT confirm the presence of the DSL data signal. And
|
|
vice versa -- perfectly possible to have dial tone and no DSL, or DSL
|
|
and no dial tone. There should also be no static or noise on the
|
|
voice line when everything is installed and functioning properly. </P
|
|
><DIV
|
|
CLASS="SECT3"
|
|
><H3
|
|
CLASS="SECT3"
|
|
><A
|
|
NAME="AEN401">2.8.1. Installing the Ethernet Network Card (NIC)</H3
|
|
><P
|
|
> Ethernet modems will, of course, require an ethernet network card.
|
|
If you haven't already done so, install the NIC in your Linux machine,
|
|
configure the kernel, or load modules, etc., etc. This is sometimes the
|
|
biggest stumbling block -- getting the NIC recognized and working. See the
|
|
various Linux references for doing this, such as the <A
|
|
HREF="http://www.tldp.org/HOWTO/Ethernet-HOWTO.html"
|
|
TARGET="_top"
|
|
>Ethernet
|
|
HOWTO</A
|
|
> for more information. Also, see the <A
|
|
HREF="tuning.html"
|
|
>Troubleshooting Section</A
|
|
> below. This is certainly
|
|
something you could conceivably do ahead of time if you already have the NIC. </P
|
|
><P
|
|
> Be sure the RJ45 cable between the NIC and the modem is now connected. You
|
|
can <SPAN
|
|
CLASS="QUOTE"
|
|
>"hot plug"</SPAN
|
|
> this cable, meaning there is no need to power
|
|
down to do this. </P
|
|
><P
|
|
> We can do a few quick tests now to see if the NIC seems to be functioning
|
|
properly. First we'll attempt to bring up the interface. Then we'll see how
|
|
well it is responding by <B
|
|
CLASS="COMMAND"
|
|
>pinging</B
|
|
> it. And lastly use
|
|
<B
|
|
CLASS="COMMAND"
|
|
>ifconfig</B
|
|
> to check for errors:
|
|
</P
|
|
><P
|
|
> <TABLE
|
|
BORDER="1"
|
|
BGCOLOR="#E0E0E0"
|
|
WIDTH="100%"
|
|
><TR
|
|
><TD
|
|
><FONT
|
|
COLOR="#000000"
|
|
><PRE
|
|
CLASS="SCREEN"
|
|
> # ifconfig eth0 10.0.0.1 up
|
|
|
|
|
|
$ ping -c 50 10.0.0.1
|
|
PING 10.0.0.1 (10.0.0.1) from 10.0.0.1: 56(84) bytes of data.
|
|
64 bytes from 10.0.0.1: icmp_seq=0 ttl=255 time=0.2 ms
|
|
64 bytes from 10.0.0.1: icmp_seq=1 ttl=255 time=0.2 ms
|
|
64 bytes from 10.0.0.1: icmp_seq=2 ttl=255 time=0.1 ms
|
|
<snip>
|
|
|
|
- 10.0.0.1 ping statistics -
|
|
50 packets transmitted, 50 packets received, 0% packet loss
|
|
round-trip min/avg/max = 0.1/0.1/0.2 ms
|
|
|
|
|
|
$ ifconfig eth0
|
|
eth0 Link encap:Ethernet HWaddr 00:50:04:C2:09:AC
|
|
inet addr:10.0.0.1 Bcast:10.255.255.255 Mask:255.0.0.0
|
|
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
|
|
RX packets:428 errors:0 dropped:0 overruns:0 frame:0
|
|
TX packets:421 errors:0 dropped:0 overruns:0 carrier:0
|
|
collisions:0 txqueuelen:100
|
|
Interrupt:10 Base address:0xc800
|
|
|
|
</PRE
|
|
></FONT
|
|
></TD
|
|
></TR
|
|
></TABLE
|
|
></P
|
|
><P
|
|
> If <SPAN
|
|
CLASS="QUOTE"
|
|
>"eth0"</SPAN
|
|
> comes up without errors, and you can
|
|
<B
|
|
CLASS="COMMAND"
|
|
>ping</B
|
|
> it without errors, and <B
|
|
CLASS="COMMAND"
|
|
>ifconfig</B
|
|
>
|
|
shows no errors, we most likely have all our hardware in working order now, and
|
|
are ready to start configuring Linux. If not, see the <A
|
|
HREF="tuning.html"
|
|
>Troubleshooting section</A
|
|
> below. </P
|
|
><P
|
|
>
|
|
<EM
|
|
>Gotcha:</EM
|
|
> A few modems may already be wired as
|
|
a 10baseT crossover, and require a direct Category 5 cable for a direct
|
|
connection to a NIC, rather than a crossover cable. I lost around 12 hours
|
|
figuring this one out, so don't make the same mistake - make sure you RTFM
|
|
first.</P
|
|
></DIV
|
|
></DIV
|
|
><DIV
|
|
CLASS="SECT2"
|
|
><H2
|
|
CLASS="SECT2"
|
|
><A
|
|
NAME="AEN420">2.9. Installing a USB Modem</H2
|
|
><P
|
|
> The physical installation of a USB modem is similar to an ethernet modem.
|
|
There is no ethernet card necessary obviously. So connect the phone
|
|
line between the DSL wall jack and the modem's DSL port, and attach the
|
|
USB cable to the computer's USB port. </P
|
|
><P
|
|
> USB modems will require vendor and model specific drivers in order to sync
|
|
and function properly. Assuming you are using the Alcatel SpeedTouch USB,
|
|
this will require both a binary firmware driver available from Alcatel's
|
|
driver page: <A
|
|
HREF="http://www.speedtouchdsl.com/support.htm"
|
|
TARGET="_top"
|
|
>http://www.speedtouchdsl.com/support.htm</A
|
|
>,
|
|
and a separate modem driver.</P
|
|
><P
|
|
> This driver also supports both PPPoE and PPPoA, though the steps for getting
|
|
either to work are quite different. See the
|
|
<A
|
|
HREF="speedtouchusb.html"
|
|
>Appendix</A
|
|
> for more on this modem.
|
|
</P
|
|
><P
|
|
> The Eci Hi Focus ADSL Modem has some support in Linux now too. See
|
|
<A
|
|
HREF="http://eciadsl.sourceforge.net/"
|
|
TARGET="_top"
|
|
>http://eciadsl.sourceforge.net/</A
|
|
>.</P
|
|
></DIV
|
|
></DIV
|
|
><DIV
|
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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SUMMARY="Footer navigation table"
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><TR
|
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><TD
|
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WIDTH="33%"
|
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ALIGN="left"
|
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VALIGN="top"
|
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><A
|
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HREF="intro.html"
|
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ACCESSKEY="P"
|
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>Prev</A
|
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></TD
|
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><TD
|
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WIDTH="34%"
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VALIGN="top"
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HREF="index.html"
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ACCESSKEY="H"
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> </TD
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