Question about Arris SURFboard SB5120 Modem

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Email cannot send email on any computer with this modem - seems to have blocked address - can recieve and all other functions work? I have tried both macs and pcs - not luck???

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Re: email

How are you trying to send email? Through an email client or web based email?

Posted on Jul 27, 2007

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Receive light blinking

First make sure your router is working (can you ping it?)
Open the modem's web page at and check the Status. Also look at the Signal-to-Noise ratio. Check the logs for obvious errors.
Do NOT change any settings if you don't know what your doing!
If you have exchanged the modem, comcast has to know the new MAC address or your modem will not authenticate.

Either post your findings here or call comcast again - there might be an issue with the connection to the outside, since you are (hopefully) getting an IP address on your computer and the modem is powering on.
Question always is: is this your modem or did you lease it from Comcast? If it's theirs, they have to fix it, if it's yours you can call and tell them that internally everything is working.

Let me know if you need more help.

Aug 15, 2013 | Arris SURFboard® SB5101 Cable Modem

1 Answer

Computer can't aquire ip address

try restarting the modem by pressing the reset button with a pen. if that fails you will need to have that modem replaced.

Sounds like there is a problem with the modem itself, where it can assign multiple IP's

Feb 26, 2010 | Modems

1 Answer

I'm trying to hook up my modem through my router. My last router had an ip address of its own which I used to tell it to work through the router. Does the sb4220?

You may want to have the modem working with your system first and hook up your router after wards.
Disconnect your router and modem.
Reboot your system.
Run your hard wire direct to your SB4220 from computer net card.
Allow to load whatever drivers necessary.
On your computer type ipconfig /all This will show you all your information.
Try the internet and see if it works. If you know the ip of your carrier, Type ping ????? ie: Ping
If you recv. a timeout you still have problems.
If you succeed, you are their.

If not, type ipconfig /renew This will reset your ip and configurations.
Now, hook up your router and you should be their.

Oct 08, 2009 | Arris SURFboard SB4220 Modem

1 Answer

The link light on my Comcast modem keeps flashing. I am having a hard time connecting my computer to the internet.I cannot access service from the hibernate mode. Most of the time the internet explorer...

Comcast is full of crappy there internet connection is horrible they are lying to everybody take it back like I'm doing I have never had such horrible connection my cell phone from ATT internet has never not once connected but for some reason my Comcast never connects

Jul 05, 2009 | Modems

1 Answer

V-Tech Connect Email Postbox Companion (COMPANION)

I don't think this machine is still supported. My mother also wants me to "resurrect" hers, but the original Internet service provider -- Unbound Communications (a subsidiary of Vtech) -- does not appear to still be in business. If this company was hard coded into the set up program it may not be usable today.

Jun 27, 2009 | Vtech E-Mail PostBox Express Portable...

2 Answers

Trying to install router for wireless

If that's hooked to comcast you can only have one computer hooked up to it, and no modems as they block mac address. If you are a Comcast customer there is a workaround. Turn on your wife's wireless if she hasit, if not get her a wireless card USB is easiest. Turn on sharing on that wireless card and you will be able to access the internet through your wifes computer, and not run afoul of your Comcast agreement. Or request an upgrade to a wireless router from Comcast but your rent goes from $3.00 per month to $10.00!


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Need program for sb4200 modem how to put new program in to modem

I can sympathize with the problems you are having with Comcast.  I have had similar ones to yours at my house not too long ago.  Have you called Comcast and had them enable the MAC address of the modem?  If not, give them a call, and they can have you up and running in about 5 minutes.  Depending on the modem, the MAC address will be on a label on the bottom or back of the modem.  Make sure that you have it correctly written, have your Comcast account number, and call them.  If they tell you that you need an appointment, tell them you want it escalated to a tech.  With that address and your account, once you are enabled by Comcast, you should be in business.
Hope this helps you out!

Jan 08, 2009 | Arris SURFboard SB4200 Modem

1 Answer

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I had a cue cart for probably 20 years or more and I think it was the finest charcoal grill ever made. Cant believe that you can't buy them anymore. I sold it in a garage sale after my wife died in 2000. I had the same problem with the grates under the charcoal and was able to find similar ones that fit that were made for a different manufacturer. However that was some time ago as you can imagine. I would like to maybe get a local mfg. to build one but I can't remember how the mechanism worked that lifted the fire grate up and to the inside of the grill. Would it be possible for you to take a picture of that front door in the open position and send it to me. My email address is

Apr 10, 2008 | Modems

1 Answer

Can not connect web cam and view outside of home network

Try to see your modem config and send the data.

Jan 06, 2008 | Arris SURFboard SBG900 (49402201900) Modem

10 Answers

Siemens Speedstream 4200 Driver

OK, we are all not dumb. the question is where are the drivers. Just go to for both the drivers for XP & VISTA, or get everything ells you want from

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