View Full Version : Modem Lockup
BowChika
31-07-2007, 12:54
Hi folks, Since the upgrade from 10mb to 20mb, my modem locks up frequently and is only re-set by switching it off and on again. The Modem is a Motorola SB5101E. Anyone else have this problem?
How old is the modem and has it got sufficient air space around it?
modem is (well certainly should be) capable on the 20meg service
check the config page 192.168.100.1
most likely a dodgy power level, wrong frequency
if you're not sure of results post them here, and if all okay check again when connection drops.
also check if the light change at all when conn drops
and finally, if ur using a router, might be worth dc'in it for a while and seein if the same thing happens, thats if all okay on config page.
BowChika
31-07-2007, 17:25
Modem Is only a couple of Months old
Config Data:
Frequency Plan European PAL I/B/G
Upstream Channel ID 2
Frequency 331000000
Downstream
Signal To Noise Ratio 42.4 dB
Power Level 14.4 dBmV
Upstream
Channel ID 2
Frequency 22200000 Hz
Power 52.0 dBmV
No Router.
I am however using TCP Optimizer from SpeedGuide.net. Worked fine with 10meg. Reset to 20meg when we were upgraded and then the problems started. It seems obvious I know But the thing is why does it fail once and a while? If TCP Optimizer set an incorrect TCP connection for 20Mb why would'nt it fail immediatley? Another thing without Optimizer or on windows default settings I'm lucky if I get a 2mb download.
aye tcp optimizer should be ok cause am using that!
and your downstream power is a little high it shouldnt go above 12 but it can work that high because there not set values
try getting the info when the cm freezes
best thing to do is wait til ur connection drops
(dont reboot the modem!!)
go to the config page
if that power level is showing roughly the same level phone tech support
tell them about the issues uv been having
and what that power level is showing as
having done that they should automatically offer to book u a tech to resolve the issue :tu:
BowChika
01-08-2007, 17:17
Well thats just it. I cannot access the config page when the modem locks up. Anyone know where the config file is located?
try a static ip when it locks up
start, run, ncpa.cpl
right clock on local area connections, select properties, select internet protocol and then properties
and put in 192.168.100.11 with subnet mask of 255.255.255.0
yeah, that actually a good point that should get u in.
if not and it keeps happening, call tech support anyway
the power level is too high, and its most likely that causing the issue
check the power level just b4 u cal through to make sure its the same
and so they can see what teh issue is.
with the power level high u shud get call credited as well
power level is high but av seen it that high before and its worked, but yeah call tech support you will get credit back and probly a tech sent out, most agents as soon as the seen power over 12 or under -12 they book a tech with really doing much
yeah, thats true
but there isnt a lot we can do
other than check the other levels on the modem
Possibly ur Network Card thats locking up ... if theres no change to the light seq.. and when it locks up u have no access to the config page it could actually be a multiple of things... but if u cant ping the modem "192.168.100.1" when it happens .. it could possibly be ur Network card thats locking up...
it sounds like a modem thats lossing its freq... but ur freq is 331000000 even after a reboot the modem wouldnt auto reset to 331000000 itd stay on the wrong freq.
modem looks fine
yeah the power level is high.. its at 14.. acceptable levels -12 to +12 however i have saw modems sitting solid @ 16 / 18 / ETC
evilmonkey
03-08-2007, 10:38
you need the downstream power level altering from the cabinet it cant be attenuated the old fashioned way as this would raise the upstream level past tolerance. Get a tech booked.
could be a good point from LaineY
while i still think u shud get a tech to change that power level
it is possible to ahve the connection running solid on that if slow
but the connection isnt as it should be if its 14 on the modem
may well be worth ur while getting the nic checked out
Nedkelly
03-08-2007, 11:52
I would call as the downsream is to high at 12 .Does the upstream level get higher durinng the day ? .:)
emm nedkelly if you work for vm then you should know its fine at 12 it can work higher than 12 because there not set levels!
evilmonkey
03-08-2007, 13:28
emm nedkelly if you work for vm then you should know its fine at 12 it can work higher than 12 because there not set levels!
Nedkelly is correct once it starts going over 12 a small variance can cause the cabinet amplifier to reset the cmts to bring it back within tolerance. the modems will only function upto 15 DBmv anyway.
no, if you look back u will see a post from LaineY which does mention high ds powers keeping the modem online, and while it can cause problems, these arent crucial to stay in range tho it is the range where connection def won't cause problems.
i believe LaineY did at one point have ds power of 23 and got connected, tho speed was slow.
though i would recommend a tech as u will see from my earlier posts that ds power level doesnt gaurentee that is what is causing the problem.
could well be the nic as suggested previuosly again and with light not altering at all makes it less likely to b modem as high ds probs would usually coz rcve to flash.
emm nedkelly if you work for vm then you should know its fine at 12 it can work higher than 12 because there not set levels!
The Set Levels are -12 to +12 <Verified by 2nd Line a Million times.. aswell as me throwing a wobbly due to the confusion of it all>
"HOWEVER" the cable modem will RUN higher in some cases..
For EG my downstream powerlevel was 15 for 10 years,.. and my connection was fairly solid..
Scotland can tend to take higher powerlevels over the network than england can... you tend to run into issues with customers in england with power levels over 13
yeah there not set they can work at high values its better in the -12 - 12 range but
evilmonkey
03-08-2007, 13:43
yeah there not set they can work at high values its better in the -12 - 12 range but
Its nothing to do with being a set value. Its the RF limitations in place on the amps and the modems.
yeah there not set they can work at high values its better in the -12 - 12 range but
VMtech u trying to steal my thunder.. FFS i jst SAID THAT!
and what annoys me even more is .. UR SITTING BEHIND ME!!!
and we jst had a 10 min argument with regards to this!
now for god sake get the guy a tech.. but if theres no issues and the engineer wastes his time.. he will be charged £75
Topic Closed?
lol so lainey its fun to argument
there is an issue
power level out of expected region
cant b charged. that issue has to be address.
whether or not it is causing the issue, it should b lowered to within expected zone
topic closed? :p:
there is an issue
power level out of expected region
cant b charged. that issue has to be address.
whether or not it is causing the issue, it should b lowered to within expected zone
topic closed? :p:
Totally Aggree m8...
and yeah.. u have closed the topic :P id tech it if it was a customer i had on the phone..
(K)
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