Question about Siemens SpeedStream Modem (4100) (SS4100)

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"fail: Test ADSL Line Sync" per AT&T Tech Readout

Using same phone line that was used for dial-up, which still works.
Never had DSL before.
House wiring checked as was all other new wiring.
DSL light on SpeedStream 4100 flashes red instead of steady green.
I connected to phone plug in outdoor interface box and got same result.
Have two Ethernet plugs on Dell computer; I get same result. I believe they both work.

All other test restults on AT&T Technical readout page say "pass" or "skipped".

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Re: "fail: Test ADSL Line Sync" per AT&T Tech Readout

Hi,there are a lot of possibilities y ur dsl light wont stop flashing red, 1.could be hardware failure,2.defective lead light for dsl,3.or line issue on the network...i strongly recommend that you contact your isp or att provider so that test would be done by their tech support,...basically you have checkd all inside wirings n as you have said you even tested the nid already...have you tried changing the dsl cable or phone cable? have you tried using another modem? were you using a filter for your dsl? you have to consider also other emi/rfi or electronic interference....but most probably you might try upgrading your modem n see if your gonna get a steady dsl light...the ethernet plugs has no effect on the dsl light...its just the cable connection or line issue or defective modem...i hope this will help, pls feel free to ask if you need further astnce...

Posted on Dec 01, 2007

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Cannot connect to my Internet. On my 2Wire modem at home, The Power LED light is solid green, the Ethernet LED light is green, the DSL LED light is continually flashing, and there is NO Internet LED...

With the DSL light always flashing, it means that either the ADSL signal (synchronization) does not reach your modem, or your modem cannot 'read' the signal.

You need to determine if the problem is from one of the following places :
  • outside of your house (your land line or ISP equipment) or from the modem;
  • your telephone-cable inside your house or
  • one of your equipment;

Try the following manipulations to determine from where the default comes :

  1. Determine if the problem is in your house or on the land line
    • Unplug each and every equipment which is connected to your telephonic installation (Fax, phones, answering machines etc);
    • Using the shortest telephone cable (RJ11) you possess, plug only your modem to the main telephone jack of your house.
    • If the DSL LED still flashes continuously, the problem is somewhere between your ISP's equipment and your house. You should call them and expose the situation. At this stage, you can't do much else.

  2. Determine if the problem is in your house installation
    If the DSL LED lights up when it is plugged to the main telephone jack, then it is either one of your equipment which is at fault, or the house installation. To pinpoint the problem, do the following :
    • With all the other equipment still unplugged, try the modem on all the other telephone jacks you have around the house.
    • If the DSL flashes continuously on one of the jacks, you will have found the source of your miseries. Depending on your ISP's terms and conditions, you will either have to call them of call for the services of a third-party technician to solve the problem.
    • If the DSL lights up correctly on all the telephone jacks, then your house telephone installation is good. Proceed to the next series of tests.

  3. Determine which equipment is at fault
    • Plus your modem to one telephone jack and wait for the DSL line to light solid.
    • Use a splitter (ADSL filter) to plug the equipments you possess (telephone, fax etc) one by one. Verify each time if the DSL LED is still lit or flashes continuously.
    • If one of the equipment causes the DSL LED to flash, it is that equipment which causes your problem.
    • If every equipment causes the DSL LED to flash, the it is the splitter (ADSL filter) which is causing the problem. You can confirm this hypothesis by testing each and every ADSL filter you have in your possession.
    • Replace any faulty equipment and you should have eliminated the problem.
If nothing of this solves your problem, you won't have any choice but call you ISP. Don't hesitate to tell them all tests you will have done.

May I also make some recommendations :
  1. Use a power surge protector (not a UPS though) to plug your modem to the electric outlet BUT plug it directly to the telephone jack;
  2. Make sure your modem is plugged in as far as possible from UPS, television, etc.;
  3. If possible, don't plug the modem in the same electric outlet as other equipments;
  4. Don't use any telephone extension cable to plug your modem to the telephone jack.

Hope this helps you. Let me know what happens next.

May 11, 2011 | 2wire (1000-000057-000) Modem


Describing Cheap Dial Up Internet Connections

Today you can find a 56k modem. Transmit data at a speed of fifty-six Kbit / s V.90 or V.92 protocol. You must understand that this is the fastest available dial-up modem. 56k is the limit of maximum bandwidth of a standard telephone line. Be sure to connect to the Internet in areas with less noise power to prevent low-speed Internet connection. At this pace, you can play online games, download large files, make video conferences or movies from a video streaming site. Many of these applications are not compatible with Internet Dial-face. A broadband cable high-speed, satellite or DSL Internet service are better preferences.

You should expect all to take a little time to coordinate a phone connection, negotiate the protocol and, finally, allow the transmission of data. In some places, this process is slower. Note that the entire system consists of three entities - the ISP, Telephone Company, and the user. All have the power to terminate the Internet connection for some reason.

Yes of course. Before the introduction of the latest 3G wireless high-speed cable and DSL broadband by satellite, it was a bestseller. Today, it's always a good option for remote areas that lack the technology or broadband fiber-to-date. Satellite networks are suitable for rural people who want to get broadband connections faster and reliable. In urban and rural areas, attracts fewer users dial-up packages which do not require very fast network and you want the lowest cost monthly cost for ISPs.

This technology is very similar to digital subscriber line (DSL), because they use a phone line. However, DSL is more preferable because it is much faster and can use the website and answer a call on the same telephone line. Unfortunately, dial-up does not work the same way, the caller will often find your line is busy. In terms of broadband connections, ADSL first. Offers the latest technologies that offer greater speed and accuracy, such as ADSL, SDSL, VDSL and HDSL.

on Jan 20, 2011 | Modems

1 Answer

Does Your DSL filter work for any analog modem attempting to send a fax (via fax software) using a DSL phone line?

Hello, Thanks for allowing me to help.

Sending a FAx over a telephone using adsl can be tricky, using a filter will help but you might want to make sure your baud rates are low, TRY 9600 baud, if you get any higher then that your filter might not filter it out and thus confusing the adsl connection.

I know mine works fine, make sure your fax is plugged into the TELEPHONE side of the filter!

I use 9600kbps , I do not recommend going any higher then that.

If that does not work you going to need to try another filter, last but not least call the telephone company if you are loosing connection.

Thanks for the questions, I hope my answer was Very Helpful.


rulds2008 rulds2008_29.jpg

Jan 25, 2011 | Zoom 98207 Adsl Filter Analog/DSL/Cable...

2 Answers

Is it possible to have 2 modems in one house

Yes. If you have 2 telephone-lines, then each modem can simultaneously be used.

If you have just 1 telephone line, and multiple wall-outlet jacks, you'll have to "coordinate" the dial-up usage -- when the first computer is connected via the modem, the second computer's modem will get a "busy" signal.

Each cable-outlet in your house can have a cable-modem -- they can be used simultaneously.

However, you can only have one DSL/ADSL adapter per telephone-line.

Nov 06, 2009 | Modems

1 Answer

Ethernet light flashing

Check your DSL Filters on your house phones or anything connected to the phone line EXCEPT the modem. The modem should not have a filter on it. If this doesnt help I would recommend getting your ISP out to test the line because sometimes the resisitors or hardware in the box goes bad or at the DSLAM.

Jul 20, 2009 | Efficient Networks SpeedStream 5667 Modem

3 Answers

No Dial tone using Symantec Winfax Pro 10 on Windows 98

Check the physical connection of the phone line to the computer make sure that it is connected to phone line symbol of the Ethernet adapter. Then make sure that the driver of the adapter is installed properly on the computer or you can try to scan the hardware first before the re-installation of the driver using the adapter.

May 26, 2009 | Conexant chipset 56K V.92 PCI Data/Fax...

1 Answer

Dsl sync


The question I have is,
1. Did you have sync previously and it has suddenly stopped working?
2. Is this new a new DSL activation of service to your address and has not achieved sync yet?

for 1.
The most common issue is usually a recent change within the telephone environment or equipment at your address, does any of the following fit your scenario: You recently moved your DSL equipment to another room, you have bought a new phone, answer machine, Fax machine, Sky television subscription, a monitored security alarm service has been installed at your address or health monitoring equipment has been installed or an unlikely, lightening strike or power outage has occurred around the same time as sync was lost.
Any of the previous changes may have altered the way DSL signal is being filtered or split from your standard home phone signal, all telephone line using devices except for the modem/router will need to have its own DSL filter, if security or health monitoring was installed you will need to contact your internet provider and request a line splitter installation (this can be at some cost to the user, so don't forget to check what a local electrician can do this same job for)
DSL Filters can also be very susceptible to problems after power surge/failure or lightening strike at your address. Or if you have recently moved your DSL equipment, please double check the way you have setup the filter and cables at its new location.
The only test required to verify the issue is not at your address is known as an ISOLATION TEST. The router must be checked in a Phone signal free environment, please remove all phone cables from all jack-points within your premis and plug in only your router, without a filter, you should also test your router across all the jackpoints at your address if the first phone-jack you try fails) If we got lucky, you now have sync and the problem lies with one of your phone line using devices or the filter that it is using, start plugging each device back into the phone circuit one device at a time, with a filter and check to see if the router has lost sync after each device is plugged back in until you are able to identify the problem device, filter or jack-point.

for 2.
Follow the directions exactly as above and if no problem devices, filters or jack-points are found, then ISOLATE your router again and call your ISP provider and request firstly a "port reset" for your DSL port, this should be achieved within a 24Hr period, some are able to do this within 20min of your call, if sync will still not come up it is time for the ISP or service provider to send out a technician to verify the issue is not at the port, cabinet or exchange, this may take some providers up to 5 days to achieve.

Some last thoughts,
Dont rule out the possibilty of the Phone cable used for the router has failed (test the cable on a working home phone to verify it is still working)
or you may have bought an extension cable for your router, the length of Ph cable between your router and the jack-point can be no longer than 5meters before DSL signal fade can start to occur, the router will work at its best with a 15cm-30cm Phone cable, the 1meter cable usually supplied is fine.
Also, do check the jackpoints that you are NOT using at this premis (rare occasions have found me resolving sync issues because the vaccum cleaner has taken out one of your unused jack-points under the bed, in the spare room or the neighbours visiting toddler has tried to plug in a jam sandwhich or even a small plastic toy of some sort into an unused jackpoint)
If you are able, do check that your router can get sync and connect Ok at an address where DSL signal and Sync is currently known to be working.
If you have just moved to this address and your property is over 40-50Yrs old, you may want to check with the phone line provider to see if "line insulators" have ever been installed previously to resolve line noise issues, ageing line insulators will corrupt your DSL signal especially on the high humidity days.
I realise this must seem quite broad and intensive, this testing is intended to rule out any possibility of the issue being internal to your address (as we all know TELCO technicians are all too eager to hit you with unexpected maintenance charges if the issue is found to be internal to your property, as opposed to external)

Hope this gets you closer to identifying the source of your DSL sync issues, if you are like the many DSL subscribers out there, you cant stand to be without your high speed internet for more than two minutes either.

Happy hunting.

Nov 14, 2008 | Modems

1 Answer

X6 won't pick up DSL

hopefully you haev installed the software first on yoy computer>
turn off the computer. connect the phone line one end to the ethernet port on your computer and the other end to one of the LAN port on the x6.
power up the (power cube shipped with the X6), the Pwr and the WLAN should come on and become steady, the LINK light should blink,
turn on you computer, connect a new phone line between ADSL port and the wall jack, the LINK light should become steady.

please rate the answer if it solved your porblem.
thank you

Sep 09, 2008 | Zoom X6 (5590) DSL Modem (55900003)

1 Answer

New computer running slow

if you are using dial up, you shud not have a modem.. modem is just for DSL connection
if you have a modem probably you are using a DSL connection

dial up - connection using a phone line with internet connection; cannot use fone while on internet

DSL/modem- connection using a modem plugged in with computer and fone line; able to use fone even when on internet.

Jul 10, 2008 | Siemens SpeedStream Modem (4100) (SS4100)

2 Answers

2Wire-3700 dsl red light blinking after a thunderstorm


If you are att customer, you will be charged $60 only if there is problem inside your premises, otherwise they wont charge you.

Is there any phone connected with your DSL line? if so is it working? if its not working, contact customer support and tell them its not working

If the phone is working, you have to check the connections between the phone line to the modem. As the DSL light is blinking red, its the problem with line and not the modem.

Take care

Jun 07, 2008 | 2wire (1000-000057-000) Modem

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