I recently changed internet service providers to AT&T for my DSL connection at home. When I ordered the new service they told me that my Siemens SpeedStream 4100 would work perfectly fine and I did not need to purchase a new modem. I have since discovered that AT&T used to (and possibly still does) send those modems to new customers who do need a modem, so there is little reason to believe that the modem would be problematic. Unfortunately, however, I have been utterly unable to access the configuration page for the modem to make the necessary changes to make it work.
I have searched around and found a few different IP Addresses to try as the access address for the configuration page, but none of them have worked. I have also reset the modem (several times) and still cannot get access. Additionally, the IP Address, Subnet Mask, and Default Gateway that I get when I allow my connection to obtain those settings automatically from the modem (reported via ipconfig) are different from what the user manual says they should be, and they have come up as three different settings; two different ones on my XP laptop, and a third on my girlfriend's vista laptop. Furthermore, attempting to use ipconfig /release followed by ipconfig /renew on either system will return an error from ipconfig /renew that says that the DHCP server could not be contacted.
Now I have borrowed a different DSL modem to allow me to use the internet and do some research into the problem, and that works great, but if possible I really need to get the SpeedStream to work.
I can see a couple of possible problems that could cause this apparent communication difficulty between my computer and my modem. First, it could be that the modem is shot. That would annoy me greatly because it was working perfectly with two prior service providers (though I never had to reconfigure it, so I never tried to access the internal configuration page), then it stopped working only when we made the ISP switch, but since I apparently can't contact the DHCP server on the modem, I think this is most likely. Resetting the modem should have returned it to factory defaults, but the typical IP addresses used for factory defaults don't seem to work, and it makes me wonder if my previous provider forced an invalid firmware update to prevent people from using their modem after switching to another provider. And second, the modem's default settings are unusual compared to other modems of the same model, though I can't think of why that would be the case.
And, of course, I'm no expert, so there could be a number of other possibilities that I'm simply not thinking of.
What I would like from people here is any/all of the following:
1. A USA technical support number for Siemens DSL modems, or at least an email address. I tried looking up that information on the usa.siemens.com website but couldn't find anything other than a general/directory number and a similarly general email address. I could use those, but I would prefer a number specific for tech support.
2. Some suggestions about how to find out what IP Address, Subnet Mask, and Default Gateway settings are most likely to work to allow me to access the modem's configuration page.
3. Some means to force a firmware update/change on the modem.
4. A great place to buy an inexpensive replacement modem that will work (something easily configurable to PPPoE and/or Bridge mode).
Thanks for any help you can give,