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plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3

[CDV] Battery in my Thomson eMTA not working?

Last night at 2:13 AM, we lost power at my house. While the power came back on in under 10 minutes, I flipped the power strip that my eMTA was plugged into. I did this as I did not want the power going on and off like it sometimes does, and cause more issues.

So, my eMTA was off between 2:13 AM, and 7:29 AM. However, my uncle was up just a bit before 7 AM, and told me that the phones were not working.

This concerns me, as my eMTA has a battery backup. Doing some searches on this forum I came across a few threads that indicate that I should get at least 8 hours out of the battery that is in the device.

Under my calculations, my device was only without power for a little over 5 hours.

Again, power was restored at my house in under 10 minutes, but I did not power back up the modem until I got up this morning.

So, my question is, why did the phones not work? Do I have a bad battery, is there something wrong with my modem? Right now, the phones are working again (as I powered up the device). The light below the word "battery" is blinking green. As far as I can remember (I've only had this modem for just over a month now), it has always blinked green...never been solid.

So, please let me know if I have a bad modem or battery. If anyone needs more information, just ask, and I'll be happy to provide it.

Thanks,

--Brian
--
============================
--Brian Plencner

E-Mail: CoasterBrian72Cancer@gmail.com
Note: Kill Cancer to Reply via e-mail



PeteC2
Got Mouse?
Premium,MVM
join:2002-01-20
Bristol, CT
kudos:6
Reviews:
·Comcast

Brian, I may be wrong...but I don't think that I am. I used to have the Thompson eMTA and I believe that once charged, the battery light should remain a solid green...that it flashes only while it is charging.

As far as how long the battery lasts? That is based on the battery used in your unit. Some are only rated for 4 hours, if I remember right. At any rate, however, backup battery run time is always a bit of a crap shoot, as they say "Your mileage may vary".
--
Deeds, not words



owlyn
Premium,MVM
join:2004-06-05
Newtown, PA
Reviews:
·Comcast
reply to plencnerb

Don't know about the Thomson eMTAs, but on my Arris, if the battery light is blinking green, something is wrong. I needed a new modem when it happened. Also, that is 8 hours of standby time. If the phone gets used, the battery life drops off quickly.

I have my modem plugged into my UPS, so I get a few hours of UPS time before the modem battery has to kick in. I also have a few spare eMTA batteries (I kept the battery from the original modem, as well as the battery they sent me to determine if the first battery was bad.) I rotate the batteries every so often so they all stay charged.



plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3
reply to plencnerb

Thanks for the replies so far.

The phone was not used at all through the night. My Uncle just tried to pick up the phone to see if it was working, and got no dial tone.

I'm going to let it charge most of the day, and keep an eye on the battery light.

At some point then, it sounds like the battery light should switch from blinking to solid.

If it does not switch, would that indicate a bad modem, or just a bad battery?

--Brian



owlyn
Premium,MVM
join:2004-06-05
Newtown, PA

Have no idea. You should look at the Thomson manual, or maybe it will say on the bottom or side of the device.



plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3

1 edit

I went to this page

»www.speedguide.net/routers/techn···ith-1306

and it has all kinds of info about my device.

There is also a link on that page to PDF manual

»medialibrary.technicolor.com/Com···G536.pdf

Which has more info.

However, all it says in both places is "Battery Backup". Does not say how long.

I am guessing that it would say that on the actual battery itself. I may try to look at the battery itself, or if I need to, pull it out and look on it and see what it says.

EDIT:

I did look at the bottom of the unit, and it does not say anything about battery life.

But, I was able to remove the battery. Again, does not say directly on the battery how long it will last. But, I did get the following information off of it.

MITAC Technology Corp.
Cell Orgin: China
Assembled IN: China
BP-LC2200/21-C1 A
8.4V 2200mAh LITHIUM ION BATTERY
MAX CHARGE VOLTAGE: 8.4V

I also want to point out that there is two physical places to put a battery. I'm not sure if it matters which side I use if I only have one battery. It was in the right side, if you are looking at the unit from the back and are able to read everything correctly. Would it make a difference which side I put it in?

And, I also want to point out that when I got this modem from Comcast, I DID NOT get a manual for the modem. All I got was the modem itself, one battery, power cord, and one 5 foot CAT 5 LAN Cable. That was all that was in the box.

I think I need to do some searching and find the manual for this thing online.....

--Brian



Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
kudos:9

If you are curious, just unplug the modem, see if the CDV still works & then time how long before the battery is depleted.



plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3

said by Johkal:

If you are curious, just unplug the modem, see if the CDV still works & then time how long before the battery is depleted.

Well, that was what I did last night, when the power went out! I turned off the power strip that the modem was plugged into around 2:30 AM. However, at some point before 7 am, my uncle said the phone did not work.

However, before I make any guesses on the time, I want to make sure things are working right. As far as I can remember this past month, the battery light has always blinked on the modem. So, it appears that I may have some kind of issue.

I did not find the manual yet, but in looking at a Cisco D3 modem with a battery backup, it said it could take up to 24 hours for the battery to be fully charged. That would sound like a standard time frame for these kind of batteries.

Since today is Sunday, their local office is not open. Even if I call and talk to someone, they won't be able to send someone out till tomorrow anyway. So, what I'll do is wait till tomorrow, and see if the battery light is still blinking or not. If its not, then I can do a test to see if the phone works when I unplug it (and if I want, time how long the battery lasts). If however after 24 hours, the light is still blinking, I think it is then safe to assume I have some kind of problem (either bad battery, or bad unit), and I'll be getting in touch with Comcast at that time to either replace the unit itself, or the battery.

Of course, if the battery light does stop blinking, and when I unplug it, the phone does not work, then I have another issue, which would also then make me involve comcast as well.

--Brian
--
============================
--Brian Plencner

E-Mail: CoasterBrian72Cancer@gmail.com
Note: Kill Cancer to Reply via e-mail


Johkal
Cool Cat
Premium,MVM
join:2002-11-13
Happy Valley
kudos:9

said by plencnerb:

said by Johkal:

If you are curious, just unplug the modem, see if the CDV still works & then time how long before the battery is depleted.

Well, that was what I did last night, when the power went out! I turned off the power strip that the modem was plugged into around 2:30 AM. However, at some point before 7 am, my uncle said the phone did not work.

Just a suggestion since you had no exact time when the battery was depleted.
--
In God we trust; all others bring data!



plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3

I agree, its a great suggestion. I will look into that once I know things are working.

As far as that goes, I'm just going to wait till tomorrow and see if the battery light is still blinking (right now, it still is). I'll report back tomorrow with what I find out.

Thanks again for all the info!

--Brian
--
============================
--Brian Plencner

E-Mail: CoasterBrian72Cancer@gmail.com
Note: Kill Cancer to Reply via e-mail



PeteC2
Got Mouse?
Premium,MVM
join:2002-01-20
Bristol, CT
kudos:6
Reviews:
·Comcast
reply to plencnerb

said by plencnerb:

I did not find the manual yet, but in looking at a Cisco D3 modem with a battery backup, it said it could take up to 24 hours for the battery to be fully charged. That would sound like a standard time frame for these kind of batteries.

Apples and oranges. Different eMTAs use different batteries and charge times as well as length of backup can vary greatly.

Even within a given model, there are different strength batteries available.

As you notices, the Thompson (RCA) eMTA can take up to 2 batteries for increased down-time, whereas the Arris TM722G eMTA that I have now has one battery compartment but at least 3 different strength batteries available.

I recall my Thompson eMTA only taking a few hours to fully charge the battery, but then it may have had a partial charge when I installed it, whereas your battery was probably fully discharged.
--
Deeds, not words


plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3

1 edit
reply to plencnerb

Well, its just short of 24 hours (cable modem is reporting an uptime of 0 days 23h:39m:32s), and the battery light is still blinking.

I believe it is safe to assume that something is wrong. While I have not tried to unplug the modem yet, I'll do that in a few minutes to verify that the phones in my house don't work. Knowing that the battery light is still blinking, I have a strong feeling that they won't work once the modem is unplugged.

Before I call Comcast, should I try to figure out if its just a bad battery, or a bad modem? Is it worth that trouble, or should I just go for the modem? I'm renting it, so its not like I'm out any money or anything. But, I would hate to swap out the modem if its just a bad battery. OTOH, if it is a bad modem (and the battery is fine), swapping the battery is not going to do any good either. Its kind of like the whole who came first thing(chicken or the egg).

I'm going to go power off the modem, and I'll report back with my results. Again, I have a strong feeling what they will be, but I want to test just to make sure.

--Brian

EDIT:

I unplugged the modem, and when I did that, all the phones in the house quit working. All the lights on the cable modem went out. I would take a guess that if things worked the way they should have, my phones would have worked (at least for a few minutes), and I would also think the battery light on the modem would be on.

So, this confirms I have a problem. Again, I don't know if its just a bad battery, or the modem itself. I also don't know if that is something I should even worry about, and if I should just call Comcast and have them swap out the modem.

This brings up a new question...if I do swap out the modem, should I try to get from Comcast a D3 eMTA? Knowing the one I have is only a D2, would it be a wise idea to get a D3 one that will run better on the network, not to mention have support for IPv6 when it is available in my area? Or, should I just stick with the same modem, and worry about that later?

--Brian



EG
The wings of love
Premium
join:2006-11-18
Union, NJ
kudos:9

FWIW, they may or may not give you a D3 capable eMTA unless you subscribe to one of their D3 speedtiers such as Blast or Extreme. YMMV.



gar187er
I do this for a living

join:2006-06-24
Dover, DE
kudos:4
reply to plencnerb

be aware that the power supplies on the street for the main line more then likely will not last 8 hours....depending on amp draw their batteries can/should last a few hours...
--
I'm better than you!



plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3
reply to plencnerb

Ok, I have good news, and I have bad news.

First, the good news. I went down to my local Comcast office, and told them what was wrong. They had no issues and swapped my modem out.

The new one I have is an Arris Model: TM402P/110.

I removed my router (which, is a home built firewall running SmoothWall Express on a Dell with 1 GB of RAM), and plugged my desktop into the cable modem directly. Went through the steps to perform the online activation, and life was good. My computer connected to the internet fine, web sites open, etc, etc.

Now, the bad news. I powered everything off, and hooked up my SmothWall box. Powered up the modem, powered up my SmoothWall box (it booted up without issues or errors), and then powered up my desktop.

Now, while Smoothwall DID pull an IP from Comcast on the red network(24.x.x.x), and my desktop did pull a local IP from Smoothwall (192.168.0.x) on the green network, I was not able to surf the web. The page that comes up is the "activation page" like I had to go through the first time when I was connected directly to the Cable Modem.

So, I go through the steps again, and it aborts the process, saying I am trying to configure a new device (my SmoothWall box) with an old device (my Arris cable modem).

HOWEVER

If I power everything off, and connect my old Netgear RP-114 web router from 1999 with a 10 MB WAN PORT......everything works fine!

So, my question is: What is the issue with my SmoothWall firewall that Comcast does not like? If I need to start a new thread to answer that, I can. Or, if we can just work that issue here, that works too.

--Brian
--
============================
--Brian Plencner

E-Mail: CoasterBrian72Cancer@gmail.com
Note: Kill Cancer to Reply via e-mail



plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3

1 edit
reply to plencnerb

I don't know why this fixed it, but I re-installed Smoothwall, and it now works!

The only thing I can I think of is that somewhere in the Smoothwall configuration, it had "saved" something with my old modem, and a re-install fixed it.

I'm now connected from my desktop, to an 8 port netgear 100 MB switch, then to my Smoothwall box, and finally to the Arris D2 eMTA cable modem.

If anyone has any thoughts as to why I needed to re-install, let me know. Otherwise, I believe everything is working the way it should.

Oh! I do want to point out that this modem did come with a battery already installed, and from what I can tell, it works the way it is suppose to. During all of this, I did unplug the modem (thinking that would reset it), but it did not..everything stayed on, and then it powered off, except to keep the phone line active. To reset the modem, I have to press the little button on the back with a screwdriver or other small item.

EDIT

One final question. Is there a modem status page on this Arris Modem? I've tried the default 192.168.100.1, and nothing comes up. I know that there is nothing there that I can change, but I figured there should be some kind of status page to look at signal levels, logs, etc, etc. So, if someone could please let me know what the ip is? Thanks!

--Brian



owlyn
Premium,MVM
join:2004-06-05
Newtown, PA

That modem status page should work, but guess what. Mine used to work, but it isn't right now. I have an Arris TM602G.



plencnerb
Premium
join:2000-09-25
Carpentersville, IL
kudos:3

Interesting. Do you think Comcast did something to turn it off?

--Brian



owlyn
Premium,MVM
join:2004-06-05
Newtown, PA
Reviews:
·Comcast

said by plencnerb:

Interesting. Do you think Comcast did something to turn it off?

--Brian

That's what I'm thinking...