ADSL Modems and Internet Access In The UK - Setup and Troubleshooting
(A Work In Progress)

Notable changes to this document

None yet.

Introduction

This guide is currently a work in progress. It so far includes enough information to sufficiently explain my standard configuration for an ADSL modem. Typically this would be used in an environment where a pfSense firewall is attached to the modem which is providing Internet access for an organisation.

TO DO

Modulation: G.DMT ADSL or ANSI T1.413

Authentication: CHAP

1.0 Internet Service Providers (ISPs)

Choosing An ISP

Email the DNS team about any static reverse DNS, for BT that's dns@btbroadbandoffice.com

BT

Zen Internet

Phone Co-op

Ordering Internet

Order 'wires only', this is the Internet connection without the modem.

Order a static IP address, which is usually an additional extra to the more regular dynamic one. Even better than 1 static IP address is to have atleast 2, though this isn't essential.

2.0 ADSL Modem Configuration

In theory the following settings will be made on the modem. These will be applied no matter which modem you're using. How these settings are applied on some specific modems are discussed further on.

Does your internet connection require a login: yes

Encapsulation: PPPoA (PPP over ATM) (RFC 2364) (not PPPoE (PPP over Ethernet) (RFC 2516). [TODO: read www.jarmanator.net/kb/pppeo.htm]

Multiplexing: VC / VC-BASED / VC-MUX

Virtual Circuit ID

MTU: Depends... probably 1500 (though possibly 1458, 1430 or 1492 [TODO: research this | http://forum.zensupport.co.uk/thread/29795.aspx | http://www.adslnation.com/support/knowledgebase/ht003.php | http://www.kitz.co.uk/ | http://www.ubuntugeek.com/how-to-change-mtu-maximum-transmission-unit-of-network-interface-in-ubuntu-linux.html | https://answers.launchpad.net/ubuntu/+source/network-manager/+question/14122]

Username: given by your ISP

Password: given by your ISP

Idle Timeout (In Minutes): 0 - keeps the connection always open

Domain Name Server (DNS) Address: the modem should be set to get this automatically from the ISP

Wireless: disable this, unless you want to give some people just Internet access

Firewall Rules - otherwise known as port forwarding or virtual servers. Before you can enter the port forwarding you may have to add a custom service specifically for OpenVPN.

Services...

Use Router as DHCP Server: yes, so that the modem is able to be swapped out and a replacement Just Work without the intervention of IT support people, and allow people with untrusted laptops who just want to connect to the Internet to do so easily. [DOES THIS CHANGE IN NO-NAT MODE?]

These settings depend on whether you're setting the modem up with or without NAT:

  • Address Reservation → Add → Choose the pfSense firewall, by its MAC address [TODO: or hostname (known here as 'Device Name')?] from the list
  • It would be nice to have address reservation in the LAN dynamic pool for the firewall router, so the firewall router is that little bit easier to setup by using DHCP on its WAN, and so that if an organisation moves they just have to connect their firewall router to a new kind of network setup and it is more likely to Just Work. However we can't use address reservation because the VPN requires a static address and we need to be able to have people slide in a spare firewall router in the event of failure, which means we want to add two firewall router MAC address both requiring the same IP address, which isn't allowed.

    2.1 Netgear DG834G

    DG834G Versions and Their Firmware

    Modem Version Latest UK Firmware Version Firmware Release Date Manufacturer Support Page
    1 3.01.38 kb.netgear.com/app/products/model/a_id/2323
    2 3.01.38 kb.netgear.com/app/products/model/a_id/2324
    3 4.01.40 kb.netgear.com/app/products/model/a_id/2325
    4 5.01.14 kb.netgear.com/app/products/model/a_id/2326
    5 1.6.01.34
    Bizarrely this comes after 6.00.25
    kb.netgear.com/app/products/model/a_id/2327

    2.1.1 No NAT Setup Type

    I recommend this method.

    You have a number of static IP addresses given by your ISP. The modem gets one, the seperate firewall machine gets another. NAT is disabled in the modem so that it acts as a transparent router, allowing more directaccess to the firewall machine from the Internet (rather than with NAT the modem creating a sub network and doing network address translation between the two different networks). The WAN interface of the modem gets an IP address automatically; the inside, usually called LAN, interface of the modem is given a specific Internet addressable static IP address provided by the ISP; the seperate firewall is given an Internet adressable IP address from the block given by the ISP.

    2.1.1.1 Setup
    2.1.1.1.1 Basic Settings

    Does your internet connection require a login: yes

    Encapsulation: PPPoA (PPP over ATM)

    Login / Username: given by your ISP

    Password: given by your ISP

    Idle Timeout (In Minutes): 0 - keeps the connection open always

    Interent IP address: Get dynamically from ISP (this isn't to get the static IP address from the ISP)

    Domain Name Server (DNS) Address: Get Automatically From ISP

    NAT (Network Address Translation): 'Disable' or 'Disable firewall'. I'd choose 'Disable firewall' as we want no NAT, and we also don't want the firewall preventing VPN access. On some modems you might disable NAT but enable firewall. If people are likely to connect a laptop directly into the modem just for Internet access then it would be safer for them to have the firewall enabled.

    2.1.1.1.2 ADSL Settings

    Multiplexing method: VC-BASED

    DSL Mode: Auto (Multi-mode)

    2.1.1.1.3 Wireless Settings

    Disable this, unless you want to give some people _just_ Internet access: Wireless Access Point → Enable Wireless Access Point - disable

    2.1.1.2 Content Filtering
    2.1.1.2.1 Services / Service

    [TODO: check if this needs adding in 'no NAT' mode where the firewall is enabled. It certainly isn't required where the firewall is disabled]

    2.1.1.2.2 Firewall Rules

    [TODO: check if this needs adding in no NAT mode where the firewall is enabled. It certainly isn't required where the firewall is disabled]

    2.1.1.3 Advanced
    2.1.1.3.1 WAN IP Setup

    [*] Connect Automatically, as Required

    MTU Size (in bytes): depends, see http://www.kitz.co.uk/adsl/tweak2.htm, http://www.the-scream.co.uk/html/resources/adsl_tweaks.html, http://www.zen.co.uk/support/tools.aspx. (In the UK possibly 1430, 1458, 1468 or 1478)

    2.1.1.3.2 LAN IP Setup

    IP address: your static IP address, may be called 'router IP address' or 'default gateway'

    IP Subnet Mask: respective to the size of the static IP address block you're given (i.e. 255.255.255.248)

    Use Router as DHCP Server - yes

    2.1.2 NAT Setup Type

    You have a single static IP address given by the ISP which is given to the modem's WAN interface. NAT is enabled in the modem, thus the modem creates a subnet with the LAN interface being given a non-Internet addressable IP address. The firewall machine's outside interface lives on this same subnet. Because traffic for the firewall is routed through the modem, VPN traffic originating on the Internet has to be specifically allowed through the modem and routed to the firewall.

    2.1.2.1 Setup
    2.1.2.1.1 Basic Settings

    Does your internet connection require a login: yes

    Encapsulation: PPPoA (PPP over ATM)

    Login: given by your ISP

    Password: given by your ISP

    Idle Timeout (In Minutes): 0 - keeps the connection open always

    Interent IP address: Get dynamically from ISP (this isn't to get the static IP address from the ISP)

    Domain Name Server (DNS) Address: Get Automatically From ISP

    NAT (Network Address Translation): Enable

    2.1.2.1.2 ADSL Settings

    Multiplexing method: VC-BASED

    DSL Mode: Auto (Multi-mode)

    2.1.2.1.3 Wireless Settings

    Disable this, unless you want to give some people _just_ Internet access (and the ability to VPN into the intranet if they have that capability): Wireless Access Point → Enable Wireless Access Point - disable

    2.1.2.2 Content Filtering
    2.1.2.2.1 Services / Service

    Before you can complete this section you need to complete the 'LAN IP Setup' section below.

    Add an entry for OpenVPN on port 1194 so that we can create a firewall rule that uses this entry.

    Add Custom Service / Add →

    If this modem is providing Internet access for a number of different organisations or people then port 1194 may already be claimed by someone else. In this case you'll need to make your OpenVPN server on the firewall router available on an alternate port, define that alternate port here and on the client.

    2.1.2.2.2 Firewall Rules

    This allows remote users to go to the modem's WAN interface and be forwarded through to the pfSense firewall behind it. The pfSense firewall then appears to be at that front-facing IP address.

    Inbound Services → Add →

    2.1.2.3 Advanced
    2.1.2.3.1 WAN IP Setup

    [*] Connect Automatically, as Required

    MTU Size (in bytes): depends, see http://www.kitz.co.uk/adsl/tweak2.htm, http://www.the-scream.co.uk/html/resources/adsl_tweaks.html, http://www.zen.co.uk/support/tools.aspx. (In the UK possibly 1430, 1458, 1468 or 1478)

    2.1.2.3.2 LAN IP Setup

    IP address: 192.168.1.1

    IP Subnet Mask: 255.255.255.0

    Use Router as DHCP Server - yes (so that the modem is able to be swapped out and a replacement Just Work without the intervention of IT support people, and allow people with untrusted laptops who just want to connect to the Internet to do so easily)

    It might be nice to have address reservation in the dynamic pool for the firewall router so that the firewall router is that little bit easier to setup by using DHCP on its WAN, but because the VPN requires a static address and because we need to be able to have people slide in a spare firewall router in the event of failure and because we'd need to add 2 machines with the same IP which isn't allowed, so we can't do address reservation.

    Troubleshooting

    ISP Contact and Status Info

    BT

    Tech support: 0845 600 7020 → 2 → 1

    Broadband status: 0800-169-0199

    Service status: www.btbroadbandoffice.com/help/sstatus/bb

    btbusiness.custhelp.com

    POP3: pop3.btconnect.com

    SMTP: smtp.btconnect.com

    Zen Internet

    Tech support: 0870-6000-973

    SMTP: mailhost.zen.co.uk

    Phone Co-op

    Telephone tech support: 0845 458 9000 9am - 8pm Monday to Friday; 9am - 2.30pm Saturdays; Bank Holidays 10am - 2pm; (Closed on Sundays)

    Service status page: www.thephone.coop/support/internet/servicestatus.html

    Customer services: 0845 458 9000 9am - 8pm Monday to Friday; 9am - 2.30pm Saturdays; Bank Holidays 10am - 2pm; (Closed on Sundays)

    Email: internetsuppprt@phone.coop

    DNS

    BT

    Primary DNS 1: 194.72.9.34

    Secondary DNS 1: 194.72.9.38

    Primary DNS 2: 194.74.65.68

    Secondary DNS 2: 194.74.65.69

    Primary DNS 3: 194.72.0.98

    Secondary DNS 3: 194.72.0.114

    Primary DNS 4: 62.6.40.162

    Secondary DNS 4: 62.6.40.178

    Note that BT DNS isn't pingable.

    Zen Internet

    Primary DNS: 212.23.6.100

    Secondary DNS: 212.23.3.100

    Phone Co-op

    Primary DNS: 139.175.55.224

    Secondary DNS: 195.10.244.152

    Problem Log: intermittent connection

    	Has the telephone bill not been paid? - BT billing team: 0845 600 6156 - 2-10hrs to reinstate.
    
    	Change the ADSL filter
    
    - zen going to get BT engineer again, ask again for NTE
    
    ==============================================================================
    
    these do different things, test the connection to different points in the network:
    username: bt_test@startup_domain
    password: any password
    username: bt_test_user@zen
    password: any password
    closer in:
    username: riptest@zen
    password: any password tho it has to be set from Zen's side first
    Make note of IP address
    factory reset
    try other modems
    note sync values / what value it's syncing at
    
    ==============================================================================
    
    A BT engineer from within the exchange rang me. He said ***** are at such a distance from the exchange, 4km, that when the line's under load it causes the ADSL mapping block to fall over. They're really at the maximum distance. The connection can be fine but then it can fall over as soon as there's load.
    
    The equipment used for ***** at the exchange for ADSL is the old equipment, they've never had a 'lift and shift' (a replacement of the old equipment with new) so they're doing that right now, it should be finished by 5pm today. In his experience of these things he'd say it's qualify as a long line issue. He says there's only so much BT can do in terms of providing equipment for ADSL to work.
    
    ==============================================================================
    
    bt to test test line / master socket
    going to push for engineer to dfix an nte (network terminatiing equipmewnt) master socket
    cos no clear cut line for where BT's responsibility ends
    
    inteference on upstream, s&r margin fluctuating quite highly
    
    ==============================================================================
    
    they did investigate
    did diagnostics
    changed s&r values
    not syncing due to noise
    
    progressses slightly different now, higher up with bt
    
    what username/pwd
    
    only with LLU do zen send their own people out
    
    fault raised with BT on 27th
    
    discuss with DSL faults team will progress it differently because had engineer visit that didn't fix it and so within a different department in BT, the Zen faluts team have better liason with .
    
    ==============================================================================
    
    Zen rang. BT say "no problem found. power cycle modem."
    
    engineer report, requested but heard no more info available
    
    are BT just saying they found no fault and so passing it back?
    how long do we leave it now before passing it back to them? because if another 3 days that's unacceptable - Zen will speak to his faults person and get back to me today.
    
    ==============================================================================
    
    Zen rang to say he's passing it back to BT after the SpeedTouch has been on over the weekend.
    Said tho it earlier looked as tho brokenness peaked in the middle of the day and definitely within working hours, that isn't now the case, for example in the last couple of days it was particularly bad at 03:00.
    
    ==============================================================================
    
    We bought a new Speedtouch 546 and connected to that with a single laptop computer. We didn't get any better results.
    
    Initial test:
    	down: 124kb/s
    	up: 373kb/s
    
    Later test:
    	down: 45kb/s
    	up: 43kb/s
    
    We've left the Speedtouch in place.
    
    I've been advised by Zen that it takes up to 72 hours for a modem to reach its optimum speed through negotiation with the BT exchange. Being as BT got good results instantly with their own Speedtouch, would that not indicate that the problem is the modem or something around that, as BT indicated? but having tried a Speedtouch ourselves and not gotten the same results as BT, what's the explanation?
    
    We're looking into replacing the ADSL connection with an SDSL connection to this kind of issue in the future, which *** (*****) are keen to pursue, but it's becoming harder for us to recommend Zen as the provider as ***** become increasingly massively frustrated.
    
    ==============================================================================
    
    Zen explained that the DLink modem we tried as an alternative has a Texas Instruments AR7 chipset. This chipset has an issue where by when there's fluctuating noise margin, as we're experiencing, rather than slow the speed down as it is supposed to, it instead causes an intermittent connection.
    
    I've found the same is true of the Netgear DG834 version 3 (but not of the newly released version 4). From Wikipedia:
    The DG834G comes in four versions, the DG834G (also referred to as the DG834Gv1), the DG834Gv2, DG834Gv3 and the DG834Gv4. The first three versions have an TI-AR7 (MIPS32) processor and 16 MB of SDRAM and 4MB of flash memory. The DG834Gv4 has a Broadcom chipset. The router runs embedded Linux with BusyBox and Netgear's Perl-based applications.
    
    The new firmware we installed was supposed to work around these AR7 issues.
    
    ==============================================================================
    
    stable since 9:50 wednesday, tho it's been up this long before
    in sync at 3.4mb, line rate at 135.
    needs to be up 3 days before climbs
    still waiting for us to try the speedtouch
    if still intermittent then goes back to BT
    
    ==============================================================================
    
    The BT engineer that visited found that using his own modem he was able to connect at a very much more reasonable speed to the Internet (4Mb/s, though still not the expected 6Mb).
    
    I've asked Zen how to proceed with finding the cause of the problem and they've advised us to get the same brand of modem as the BT engineer uses. They say the Thomson Speedtouch is better at coping with a noisy line. We've ordered such a modem (you can't buy them in shops, only online); we would have had it yesterday but the supplier lied about having it in stock, we expect to have it today.
    So far we've followed Zen's previous advice, trying two different modems and filters from different manufacturers.
    
    Matt was in **** yesterday and got the impression that the speed of the connection isn't as much of a problem as it was but that the intermittency of the connection itself still is - he received 500kb/s (60kB/s) upload and download rate on the couple of times he used it briefly, rather than the 120kb/s that has prevaled for the last six weeks.
    
    We're working on getting a custom quote from Zen for a synchronous line to replace the ADSL.
    
    ==============================================================================
    
    - Zen don't cap Internet connections
    - Zen ask if we can we try a speedtouch modem 330, 536 or 546 or any Speedtouch
    - The d-link dsl-504t TI chipset has an issue with TI ar7 chipset, causes intermittance when fluctuating noise margins
    
    ==============================================================================
    
    BT engineer booked for 1-6 13/6/8. I talked to people in the office and asked for this rather than 8-6 or 8-1. When I rang to give notice of this to Jemma today she said they can't come at 6 cos the building won't be open then; she was annoyed about this. I said that I had arranged this with the people in the office who would be in for the appointment if told in advance.
    
    ==============================================================================
    
    line ok, router not syncing
    intermittancy high, doesn't seem to have improved
    sync rate very low, spmetimes disconecting for 5 and 20 mins
    not in sync, droipping sybnc / sync rate very low
    zen are rejecting BT's work
    
    ==============================================================================
    
    2) Zen say:
    now syncing at 800 which is  very low, apallingly low
    sync speed is so low that the BRAS won't begin to rise
    They advise turn on for half an hour will force it to resync otherwise it picks up on where it left off
    
    
    1) BT engineer is outside at the green box, changing pairs back to the exchange
    exchange nr apollo, so it's a long one.
    
    says noise we hear on line, shhh rather than crackle, def sounds like a problem
    a crackle would have been water.
    
    Upstream
    Loop Loss: 24 db
    SNR Margin: 6 db
    Errored Seconds: 2
    hec Errors: 2
    Cell Count: 33338
    Speed: 608
    
    Downstream
    Loop Loss: 42.5 db
    SNR Margin: 14 db
    Errored Seconds: 0
    hec Errors: 0
    Cell Count: 162183
    Speed: 896
    
    BIP Interface Data
    Current line rate: 135
    MSR: 8128
    FTR: 6502
    Interleaving: A
    ==============================================================================
    
    A bit more background info for those who want it...
    
    Some device that wasn't previously causing a problem with the Internet access can begin to cause a problem because it can have degraded over time and suddenly pass a point at which it starts to becomne an issue.
    
    Zen ask that the potentially issue causing things I previously listed be turned off because they are things BT can cite and wait for us to deal with. If we can say we've already dealt with them then it hurries the process along. If the microwave has been off for a couple of days by the time BT come in and the problem persists then BT know it isn't the microwave before they even suggest it.
    
    From what Zen presume and what various other people I've spoken with have said it sounds very much like an internal **** problem. One person told me that when BT have wired cable up the wrong way around it causes line noise like we're hearing and that it's easy to take the junction box apart and swap the wires over; another person told me they'd be happy to come in and put a new cable in from the junction box where it comes in from the street, up to the server room, thus navigating around any potentially troublesome cabling that may have been inadvertantly damaged, though we'd have to remove this before BT looked at it. I'm not suggesting we do these things because neither myself or Matt are telephone engineers and so can't offer expert advice but they indicate that others have experienced this kind of issue and found straight forward means of fixing them.
    
    ==============================================================================
    
    Current thinking is that the problem is a wiring issue somewhere within ****, between the server room, across the ***** office, down the stairs to the telephone junction box.
    The problem is most pronounced between 9 and 5, especially so at dinnertime in the middle of the day.
    Zen have advised on things that omit radio frequency waves that  could be intefering with the telephone cable and thus causing the modem to disconnect and subsequently operate at a very slow rate, such as a microwave oven, wireless telephone, central heating switch [even on other side of wall] or television [wireless phone cable beside our modem phone cable can be acting as an aerial].
    I've asked Jemma to ask staff not to use the microwave oven for the next few days and to disconnect any wireless telephone equipment. 
    
    Zen also said to check a radio on 615MHz (5 Live) for inteference.
    
    ==============================================================================
    
    - BRAS server
    - BT say it can take up to 72 hrs, can vary depending on load on bt servers or environmental conditions
    
    
    Zen just rang me to say that things are looking good. Since Jemma restarted the modem at 10:58am today it hasn't disconnected (which is one of our 2 problems).
    
    We now have to do as we were doing last time we fixed something, wait, up to 72 hours for the speed to slowly climb to what it should be.
    
    If this fixes the low speed and multiple disconnections issues then it looks like the problem will have been a noisy telephone line which BT say they fixed yesterday evening. 
    
    
    https://secure.zen.co.uk/zebra/sec/fault.asp?f=54672&a=324924308815
    "27-May-2008 19:50 (BT)
    **Retest needed**
    
    BT have completed diagnostics and would like you to try the connection again to determine if the fault has been resolved.
    
    A basic retest would require you to power-cycle (power off and switch back on) your ADSL equipment and test from the BT test and/or master socket."
    
    - check voiceline is clear by ringing BT on 151. Don't mnention broadband cos they'll say see your ISP.
    then ring Zen back. 
    
    ==============================================================================
    
    Ian rang today to say no change in speed - <100Kb/s down, 500kb/s up
    
    we have 2 problems, the slow speed and lots of disconnections.
    - noise margin very low
    - session restarted daily apart from weekend, 2 days is longest it's been up.
    - There's been 110 disconnects since 30/3/8, mostly during daytime. sometimes up for days, sometimes hours, sometimes minutes.
    Zen's RADIUS logs show up till 1/5/8 it looks stable then went wrong. highest sync rate is generally 6Mb, tho this might be wrong.
    
    cos line not stayed up for 3 straight days we have to log it with BT as an internittant error rather than an issue with line speed negotiation
    
    using phone, with modem connected there's a hiss, with both modems (Zen say this might allow us to get a master socket.). But bcos there's no master socket we can't test internally. Dlink modem is less noisy than the Netgear but still there.
    tried differnet filters.
    This indicates it's an internal telephone wiring issue or device connected (we have no other devices in the building connected as far as we know).
    
    disconnect all non-DSL equipment whilst fault raised with BT - only the fax is connected
    
    ==============================================================================
    
    'I installed the new modem firmware. The modem is now connecting at, first 8mb/s, then later after a restart 4mb/s, but at least consistently, not fluctuating, which looks promising.
    
    Despite the 8Mb/s or 4Mb/s connection rate reported by the modem, the actual throughput remains very low. For some reason the line speed at the BT exchange is limited to a max throughput of 135kb/s.
    
    The BT exchange limits the speed when it's having trouble syncing with the modem at the faster speed. It reduces down and down to the maximum that will work.
    There are many reasons why this happens, one of which is noise on the line. Such noise can appear when it wasn't there before. I'm wondering if the road works that have been going on all around **** could be to blame.
    
    Zen speculate that the new firmware (released in March of this year) might be more adept at dealing with increased noise.
    
    Now that we have the new firmware, with the ADSL compatibility fix, and have restarted the modem, the BT exchange is trying to speed up the connection to see if it works at a faster and faster rate. This can take a couple of hours, probably 24 hours but may take at most three days.
    
    None of this story relly hangs together to give a thorough explanation of what's going on. I think because there are so many reasons an ADSL line can become slow and because of the difficulty Zen have in dealing with BT.
    
    The guy I spoke with at Zen discounted what Ian was told that BT will put the line into a fluctuating state when the bill hasn't been paid.
    
    If this doesn't fix the issue we have to wait three days before contacting Zen again.'
    
    - upgraded DG834G firmware from 4.01.28 to 4.01.37
    
    WITH DG834G:
    DownStream Connection Speed  	7136 kbps
    UpStream Connection Speed 	832 kbps
    
    HTTP download rates of 13kB/sec ~100kb/s. 7Mb/s is 875kB/s
    
    http://www.dslreports.com/speedtest?flash=1 claims rate of (LA server)
    	download: 55kb/s
    	upload: 84kb/s
    	latency: 603ms
    (this is whilst others are also using the internet)
    
    
    changed filter
    
    
    WITH BACKUP MODEM:
    832 Kbps Upstream,
    3872 Kbps Downstream
    
    http://www.dslreports.com/speedtest?flash=1 claims rate of (MEGAPATH SAN FRANCISCO)
    	download: 71kb/s
    	upload: 292kb/s
    	latency: 104ms
    
    
    WITH DG834G AGAIN:
    DownStream Connection Speed  	3776 kbps
    UpStream Connection Speed 	832 kbps
    
    These aren't as wildly differing connection rates as before.
    But actual download speed is bad, I think, but can't be absolutely sure without being the only user.
    
    http://www.dslreports.com/speedtest?flash=1 claims rate of (MEGAPATH SAN FRANCISCO)
    	download: 91kb/s
    	upload: 533kb/s
    	latency: 108ms
    
    browse profile is set at exhange is currently set at 135 (despite connection speed being 8mb). now we have a more stable connection the exchange will gradually increase, can take between few hours and 3 days. Cam be sped up by not restarting modem. probably OK after 24hrs.
    
    Something on the line may have changed (such as noise) and so this new firmware may help with that.
    
    
    4mb and 7mb is normal for *****
    
    ==============================================================================
    
    swapped filter
    
    DSL speed
    	704kbps upstream
    	1184 kbps downstream
    backup dsl modem log says
    ...connected...
    DSL carrier is training
    DSL carrier is training
    DSL carrier is down
    DSL carrier is training
    Connection terminated
    DSL carrier is down
    
    
    new netgear modem log says
    	160kbps downstream
    	576 kbps upstream
    
    downloading GIMP at 15kB/s = 120kb/s
    
    This is without the telephone connected into the filter
    
    I attached old filter and got:
    	2592kbps downstream
    	832 kbps upstream
    
    a minute later I'm seeing:
    	1600kbps downstream
    	800 kbps upstream
    
    a minute later I'm seeing:
    	6912kbps downstream
    	832 kbps upstream
    
    I removed fax machine which uses this line
    
    I spoke to Aaron at Zen
    
    need to find the master socket, BT will only test at this point.
    
    there's a large one, about 8cm each side., with a load of small white cabling going into it and one cable bigger and differently coloured coming out of it.
    downstairs by the side road door there's a big BT box with loads of things cominng into it
    
    continue on with Philip Ashley who Sue says has dealt with all this before now. Tho I spoke with Aaron previosuly, his name wasn't on the record.
    
    I spoke to Sue 2nd time around.
    
    Changed DSL mode from 'Auto (Multi-mode)' to 'ADSL (G.DMT)'.
    
    when dial phone on Internet line as soon as dial a number says "the number you have dialled has not been recognised"
    
    if there's a landline problem we have to ring BT OpenReach - because it's BT Retail's problem 0800-800-151 (general fault team)
    
    Zen did line test. one of the tests says "service in course of provision" - because of problem with landline
    
    Phil says it's not a happy line, noisy
    
    ***** Internet landline number: ...
    
    
    
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    Further Reading

    Using PPPoE in the UK for Broadband connectivity

    PPPoE authentication in final pilot to providers

    thinkbroadband Q&A: www.thinkbroadband.com/faq.html#Q213

    www.thinkbroadband.com

    ISP Configuration Information: kbserver.netgear.com/kb_web_files/N100472.asp

    Disable NAT on DSL router and do PPPoA / PPPoE in firewall - will this simplify the setup and strengthen the networking setup (by converting the ADSL modem to bridge mode and doing PPPoA / PPPoE authentication in the firewall). mybroadband.co.za/vb/showthread.php?t=52222