06-16-2012 12:05:27 AM
Solid Green! Okay, fellow At&t 3G Microcell users with problems, these forums helped me out, so here is my story. Hopefully it can help someone else. – I got my 3GMC second hand, and for weeks I have been working daily to try to get it activated and working properly. Problem 1: hooked up using option A= solid power, Ethernet, and gps lights & RED blinking 3G light. Solution: Previous owner had not logged in or called At&t to “disconnect the device from the network” and so it didn’t recognize the gps location as being where the activated user was in the world. That owner finally disconnected it, and the blinking red 3G light turned blinking green. I thought, great, now I can activate it online and it’ll just work. Wrong! Problem 2: a never ending blinking green 3G light. I scoured the forums, had multiple customer care calls, and tried multiple setups and router settings. Solution: Unbelievably, I think that the ultimate solution was the power cord itself. I don’t know if the one given to me was the original, but reading one post somewhere from someone about getting the power cords mixed up after trying to get his 3GMC working again after a power outage was enlightening. He mentioned that a tech told him that the femtocells are very sensitive to the power supply! The 3GMC sticker calls for a power supply of 12v, 0.8a. The manual says it needs 12v, 1.25a. My power cord was 12v, 0.5a! I found a power supply cord for a different device rated at 12v, 1a, so I tried it. For good measure I logged into my account and disconnected the unit. Then I re-registered it minutes later. BOOM! In 30 minutes, I had a SOLID 3G light for the first time! I think that it just wasn’t getting enough juice! Overall, I tried many options and I had to learn many things. I suggest taking a look at the power supply first and then these options to try to get your unit working: turn on auto DCHP setting on in your router, set MTU to auto in the router, IPSec pass-through enabled in your router, port forwarding in the router using the ports listed in the manual, disable Upnp setting in the router, check that Ethernet cables are through and not crossover type, power cycle 3GMC, router, modem multiple times, finally make sure the 3GMC can get a gps lock during activation by putting it by a window. My equipment: Linksys CM100 cable modem-Linksys WRT54G2 router-3GMC. Good Luck to us all, as I can only hope mine keeps working properly.
07-21-2012 08:47:10 PM
Signed up for ATT forums just to say thanks! Been working on this for a little while now and your resolution was my resolution!
Kudos (I know you didn't originate the idea, but I found your posting first)!
07-23-2012 06:05:57 AM
as far as reading the device, the half-circle or "Open C" in the middle will open toward the polarity that is represented. so if it reads
+ C -
the polarity is negative.
- C +
the polarity is positive.
04-26-2013 04:32:25 PM
04-27-2013 08:58:44 AM
07-23-2013 06:04:42 AM
Thank you for your post! A new power cord worked for me too! It took about 12 hours, but it worked!!! Power cord on ebay was much cheaper than upgrading the DSL, (which is what ATT tech support advised) or purchasing a new Microcell! I also did the hard reset (press and hold resest button for 30 seconds) as I had seen mentioned on these boards also. Thanks again for posting!
07-23-2013 08:37:18 AM
I'm glad it worked. It would be helpful if you marked this post as an Accepted Solution so others may be able to find it by using Search. A Kudo would also be nice. Any other issues, just post and we'll see what we can do.
08-03-2013 02:02:39 PM
I have been working on a MicroCell Informational Document for Technical, Operational, and Troubleshooting Issues (tentative title) for the last year or so. I plan on posting it in the next couple of weeks as soon as I can get some info confirmed and have it reviewed. Hopefully it will be helpful to all when understanding how the MicroCell works and why it doesn't at times. Along with some useful troubleshooting methods culled from the last 3 years or so of postings, communications, etc. Stay tuned.,