I doubt you have a modem failure. I've
never had a modem fail, and very few do - rather they are usually
replaced because 1) someone missed a level issue somewhere, 2)
they were blew out with lightning, or 3) you wanted a docsis 3.x
modem for better speed.
You probably have some coax teetering on the verge of being crap
somewhere, like a central conductor sucking out, and just barely
left conducting. Hot in the day, cold at night, think about what
that does to metals, ie expansion/contraction, work hardening
metals. Some just snap in the insulation. AZ is rough on coax
with extreme heat as east-coast extreme cold is.
I still say you have a bad connection between the modem and your
ped (outside). Take the modem and a laptop to your external box
if you can, remove any splitters direct to the line, power it, and
check your levels on the internal page there. If they don't
improve, the issue is from the ped to your house, not inside. Or
call cox and have them check your levels as you do, you might need
"advanced" support to do that as the first-level folk are barely
sentient these days to speak full sentences.
Last time was the aforementioned missing/undocumented splice in my
coax outside at the neighbor house became an issue, cox told me to
replace my modem after checking at my house by a contractor.
Begrudgingly I did, got a new docsis3.0 at the time, and same
shite, random drops and 30% packetloss after an hour. That's when
I got an escalation, and a cox field tech supe came to my house
ready to tell them to start trenching my street to replace it (my
ped is across the street, yay). He checked at the outside, and
found levels to be terrible still, and literally had to dig up my
yard and my neighbor's to find the missing joint. Replaced the
ends, new joint connector, and my connection was rock solid again.
Anything spotty like that is a physical issue in coax, I will put
money on it. Been dealing with cable modems since working at
@Home in 90's.
Getting a 3.0 modem has advantages too - the 2.0 channel space was
legacy from old analog days, working around old crap and left to
die, and the 3.0 channel space is net-new, though any new modems
are such and use that these days. Newer 3.1 units use the 24/8
downstream/upstream channels for better throughput (newer tech
uses channel bonding to span physical links for more bandwidth),
which is being deployed to give gig-capability, downstream at
least (max upstream is ~245mbit/s).
-mb
On 02/27/2015 09:14 PM, Mark Phillips wrote:
I'm back....
My internet went out again tonight. I think my
Motorola Surfboard SB6141 may have been damaged by the input
signal being too high. The current signal level are the same as
when the Cox guy left, so I assume they are still in the green
as far as Cox is concerned.
The modem is exhibiting what appears to be heat
related failures. When the modem stops working, I can ping
servers on the local network, but not Google. When I power off,
wait 30, and power on, I can ping Google. However, I get time
values around 477 ms. If I leave the door to the modem cabinet
open and wait a few hours, the ping times slowly drop to around
the normal 19 to 21 ms. I pretty much get the same server
responding all the time...lax02s21-in-f14-1e100.net.
Do you think I should get a new cable modem like a
sb6183?
Mark
On Feb 25, 2015 1:44 PM, "Mark Phillips"
<mark@phillipsmarketing.biz>
wrote:
A short recap on the problem....
I signed up for the Cox home cable plant support
option - $7/month. Cox came out yesterday and the
technician said the signal as too strong, and he
removed an amplifier from the circuit and now the
modem is not dropping the signal. The new signal
strength is 2-3 dBmV. My average ping time to google.com also dropped by 2 ms!
He did not change any cables. He did replace some old
splitters in the attic for the TVs, and the signal
strength there improved, too.
So, for once, Cox came through.....I think!
Thanks for all the advice!
Mark
On Sat, Feb 21, 2015 at 12:32 PM,
Mark Phillips <
mark@phillipsmarketing.biz>
wrote:
Thanks again for all the input. I will check out
the Cox service plan for $7.00/month and see if they
can get it fixed!
Mark
On Sat, Feb 21, 2015 at
10:52 AM, Eric Oyen <
eric.oyen@gmail.com>
wrote:
I have the internal
wiring insurance offered by Cox. SO far, its
been worth the additional $6 a month. The
phone lines in this house (which are covered)
are about 50 years old. we will need to get
them replace soon (my ham radio keeps coming
in on the phone). We had all the cable redone
in the house about 10 years ago, and even have
a single dedicated line out to the pedestal
for the cable modem. So far, that one line is
noise free and the cable modem (a motorola
make) has been chugging along happily for
about 7 years.
anyway, thats my story and I am sticking to
it. :)
-eric
On Feb 21, 2015, at 9:18 AM, Michael
Butash wrote:
> As long as it's not RG-58 (stuff
satellite usually installs), it's probably
ok. Cox will only install RG-8 these
days, so check what you have,
>
> My coax is going on 15-20 years old,
and I've never had an issue with it. This
isn't usually the issue
>
> Another thing that goes bad are
splitters. Mine has crapped out a few
times over the years too. Since I never
watch tv, and haven't had cable tv since
the 90's, I just removed all the splitters
and use a 1-to-1 joint from the external
to my modem.
>
> Have cox replace your external line,
they should do that for free, and start
there.
>
> What others will do/have done is get
the "coverage" package from cox per month,
another 6-8 bucks, have them fix/replace
your inside lines, and cancel the
service. Janky., but I was told that by a
cox field tech. :)
>
> -mb
>
>
> On 02/20/2015 11:41 PM, Mark Phillips
wrote:
>> Thanks for the info! Do you know
any reasonable cable installers who could
replaces the coax in my house? It is over
ten years old, and probably the problem.
The cable to the dmz is just a year old,
and at the opposite end of the house from
the cable modem. I have also been having
some issues with the tvs in the house, so
time to replaces all of it.
>>
>> Mark
>>
>> On Feb 20, 2015 9:35 PM, "Zany
Yan" <sirlight@cox.net>
wrote:
>> Mark,
>>
>> I used to have a LOT of problems
with my Cox connection. It was working
then it would start recycle the modem like
every 2 mins for a long while. My signal
was CRAP!!!!!
>>
>> Finally, it totally quit all
together. Couldn't even connect. Finally,
a Cox technical person came over. Looked
at my cable from the DMZ box on the side
of the house to inside with a meter and it
was VERY bad.
>>
>> Ended up totally replacing the
cable from the DMZ box all the way to the
cable modem.
>>
>> Once that was done, my connection
came back.
>>
>> You want to call COX Internet
technical support line, don't call the
help line. Make sure you keep telling them
that the connection has been dropping like
crazy.
>>
>> Jon
>>
>> On 02/20/2015 08:06 PM, Mark
Phillips wrote:
>> I have a 1-3 year old Motorola
Surfboard SB6141 and Cox. The modem and
>> my LAN are up 24/7. Recently, I
have been loosing my connection to the
>> Internet. My local LAN is up (I
can ping/ssh other computers on the LAN)
>> but I get and error message of
"Can't resolve host" when I try to ping
>> google. A quick power off, wait
30 seconds, power on of the modem fixes
>> the problem. These outages are
happening more frequently - daily for the
>> last two days. The lights on the
front of the modem are not different
>> between running normally and
unable to access the Internet.
>>
>> The downstream signal to noise is
37 - 38 dB @ 14 dBmV. The upstream
>> power level is 41 - 45 dBmV.
>>
>> I am seeing this in the logs for
the modem on a regular basis after the
>> reboots
>>
>> MIMO Event MIMO: Stored MIMO=-1
post cfg file
>>
MIMO=-1;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
>>
>> TLV-11 - unrecognized
>>
OID;CM-MAC=xx:xx:xx:xx:xx:xx;CMTS-MAC=xx:xx:xx:xx:xx:xx;CM-QOS=1.1;CM-VER=3.0;
>>
>> Do I need to buy a new modem? Is
there anything Cox can do?
>>
>> Thanks,
>>
>> Mark
>>
>>
>>
>>
---------------------------------------------------
>> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org
>> To subscribe, unsubscribe, or to
change your mail settings:
>> http://lists.phxlinux.org/mailman/listinfo/plug-discuss
>>
>>
---------------------------------------------------
>> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org
>> To subscribe, unsubscribe, or to
change your mail settings:
>> http://lists.phxlinux.org/mailman/listinfo/plug-discuss
>>
>>
>>
---------------------------------------------------
>> PLUG-discuss mailing list -
>> PLUG-discuss@lists.phxlinux.org
>>
>> To subscribe, unsubscribe, or to
change your mail settings:
>>
>> http://lists.phxlinux.org/mailman/listinfo/plug-discuss
>
>
---------------------------------------------------
> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org
> To subscribe, unsubscribe, or to
change your mail settings:
> http://lists.phxlinux.org/mailman/listinfo/plug-discuss
---------------------------------------------------
PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org
To subscribe, unsubscribe, or to change
your mail settings:
http://lists.phxlinux.org/mailman/listinfo/plug-discuss
---------------------------------------------------
PLUG-discuss mailing list -
PLUG-discuss@lists.phxlinux.org
To subscribe, unsubscribe, or to change your mail settings:
http://lists.phxlinux.org/mailman/listinfo/plug-discuss
---------------------------------------------------
PLUG-discuss mailing list -
PLUG-discuss@lists.phxlinux.org
To subscribe, unsubscribe, or to change your mail settings:
http://lists.phxlinux.org/mailman/listinfo/plug-discuss 
(text/html)