Question about Siemens SpeedStream Modem (4100) (SS4100)

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Blinking light on the DSL modem.

Most recently I found that when I turn my Speedstream 4100 DSL modem, the power light and the ethernet light come on steady but the DSL light blinks constantly between green and red. I checked the connnections both on the device as well as on the filter and all appeared well. I called the tech support and after running a check on their lines, they advised me that my modem was bad. It was running fine for the longest time and then all of a sudden it stopped. I decided to power down and then power up again. It worked fine for 2 minutes then the DSL light started blinking again and I lost connection to the internet. I tried that a few more times but to no success. Do I really need a new modem or can it be something else?

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Re: Blinking light on the DSL modem.

Unfortunately it sounds like the modem may need to be replaced. I had the same issue. Even after doing a complete shutdown, resetting all the cables, restarting the modem and then the computer, it still did not work. After you get the modem replaced, I would suggest you get a spare, possibably from e-bay, so if this happens again, you will not be without DSL Service.

Posted on Dec 29, 2007

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I have a Speedstream 4100. When turning on the modem, it goes through the initial tests (lights,etc.), then the only lights that come on are the power light and the DSL light (steady green). The ethernet...

Your computer is not communicating with the router and modem it needs to reset to factory specs then reboot the computer,modem then router in that order.If this does not work contact your dsl provider for info as to your ip address ,gateway and reset with the provider.

Mar 21, 2010 | Siemens SpeedStream Modem (4100) (SS4100)

1 Answer

Siemens; SpeedStream 4100 B Modem,will not connect to DSLinternet

usually the DSL would turn on if DSL connection is established. if you already replaced the modem. then your old modem might already be bad.

Feb 14, 2010 | Siemens SpeedStream Modem (4100) (SS4100)

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My external Siemens Speedstream 4100 external

take it to the store to have them look it over they will give you advise on what you should do and where to take it

Feb 10, 2010 | Siemens SpeedStream Modem (4100) (SS4100)

1 Answer


Does the DSL light come on at all when the modem is powered up?? If not, then it looks like the modem is bad.

When the modem is first powered on, all of the lights should come on and then go off after a few seconds. The power light should then begin to blink while the modem does a self test. Once that is done, the DSL light should come on and begin to flash red. If it senses a DSL connection, it will change to flash green until it has established a DSL connection. If it does not detect a DSL connection, it will continue to flash red. If the light does not flash at all or if the power light continues to flash after a minute or so, then the modem is most likely bad.

Let me know if you need more help. :)

Jan 12, 2010 | Siemens SpeedStream Modem (4100) (SS4100)

1 Answer

Constantly blinking Activity light

Well, you are very correct with the activity light blinking and the increased blinking except the fact that modem will encounter a problem in future...
The 5 different lights on your modem namely Power, Ethernet, DSL, Internet and Activity have their own indications and explanations.
1. The Activity Light indicates the amount of activity that is takin place on the computer on the Internet though the activity might blink even when you are not browsing. This can be explained by stating that the computer constantly keep sending signals  about it being connected to the internet and any other acknowledgements..

So, you've got nothing worry about unless the Power or the Ethernet or the DSL or the Internet light Blinks....
Cause they are the resultants of a fried modem(check for the adapter), faulty LAN connections, interrupted Dsl line and the account verification failure indications respectively.....

Dec 18, 2008 | Siemens SpeedStream Modem (4100) (SS4100)

1 Answer


Technical Specifications AAL and ATM Support
VCI 0-65535 address range
VPI 0-255 address range
AAL5 support
IEEE 802.1.d Transparent Learning Bridge (dynamic learning of up to 255 addresses)
Spanning Tree support
FCC Part 15, Class B
CE certification
DSL interface: RJ-11 or RJ-45 (Europe)
Ethernet interface: RJ-45
USB Type B interface (5200, 5500 series)
Diagnostic LEDs
Power, DSL, Activity, Ethernet status; USB status (5200, 5500 series)
Intuitive, Web-based GUI management access
SNMP support
Comprehensive hardware diagnostics
Media Interface
RJ-11 or RJ-45 (European) DSL WAN connection
10/100Base-T RJ-45 Ethernet LAN connection
USB Type B LAN connection (5200, 5500 series)
12V power supply included, 700ma max. 5400/5500 - 12 VDC, 1000ma max.

DHCP server/DHCP client
Network Address Port Translation (NAPT)
Network Address Translation (NAT)
Packet filtering
RFC 2364 Point-to-Point Protocol over ATM PVCs (PPPoA)
RFC 2516 Point-to-Point Protocol over Ethernet (PPPoE)
RFC 2684 (formerly 1483) Bridged Ethernet and routed encapsulation Routing
Standards Compliance
IEEE 802.3
USB 1.1 T1.413 issue 2 G.992.1 (G.DMT) G.992.2 (G.Lite)

Oct 15, 2008 | Siemens SpeedStream Modem (4100) (SS4100)

2 Answers

4100 flashing ethernet light

If the internet light is not on that indicates a prob with your ISP, call them up and arrange a service call. I had a similar prob a few weeks ago and they had to replace the drop to the house from the telephone pole.

Sep 02, 2008 | Siemens SpeedStream Modem (4100) (SS4100)

4 Answers

Speedstream 4100 modem

can be a deffective modem.. they had replaced mine only 5 times..

Dec 29, 2007 | Siemens SpeedStream Modem (4100) (SS4100)

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