Awful On Off Connection
 

All day my connection has been flaking out - pages wont load, no Xbox Live, no Twitter!

Had 2 very unproductive calls with Tech Support who after telling me that the Cable modem was fine, decided that it was at fault and is sending me a new one.

Does this onfo from my modem look ok to you guys?

Downstream Lock : Locked
Downstream Channel Id : 7
Downstream Frequency : 330750000 Hz
Downstream Modulation : QAM64
Downstream Symbol Rate : 6952 Ksym/sec
Downstream Interleave Depth : taps12Increment17
Downstream Receive Power Level : 8.2 dBmV
Downstream SNR : 41.2 dB

Upstream Lock : Locked
Upstream Channel ID : 2
Upstream Frequency : 29200000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 47.5 dBmV
Upstream Mini-Slot Size : 2

Re: Awful On Off Connection
 

I could be wrong, but the upstream power level looks a little high.

What kind of modem do you have?

Re: Awful On Off Connection
 

It's an NTL 250 Stuart, thanks for the response!

Re: Awful On Off Connection
 

The power levels are quite normal for a EX-NTL connection and the Upstream is fine.

Re: Awful On Off Connection
 

I'd be a little worried about the downstream power level, also is that Downstream Frequency correct?

Re: Awful On Off Connection
 

Don't mean to steal the lime light but are my modem stats ok?

================================================== =========
Downstream Channel
The data shown in the table below provides information about the signal coming from the network to your cable modem.

Downstream Status
Operational
Channel ID
6
Downstream Frequency
331000000 Hz
Modulation
256QAM
Bit Rate
10240000 bits/sec
Power Level
0.5 dBmV
Signal to Noise Ratio
38.8 dB


Upstream Channel
The data shown in the table below provides information about the signal being transmitted to the network from your cable modem.

Upstream Status
Operational
Channel ID
3
Upstream Frequency
34000000 Hz
Modulation
16QAM
Bit Rate
512000 bits/sec
Power Level
44.5 dBmV
================================================== =======

Re: Awful On Off Connection
 

Both are fine. Chap is on the 4th ex-ntl overlay network downstream channel, power levels are ok for 64QAM EuroDOCSIS and upstream is all good.

http://www.cableforum.co.uk/board/12...al-levels.html

Re: Awful On Off Connection
 

Thanks for the responses guys, does it seem like the new modem will fix the issue? Or should I push for an engineer?

I'm now just using my iPhone. Which isn't ideal!

Re: Awful On Off Connection
 

Downstream fine and frequency is an NTL one.

---------- Post added at 22:32 ---------- Previous post was at 22:31 ----------

Power levels are fine for an EX-Telewest 10Mb connection.

Re: Awful On Off Connection
 

Well, an engineer came out this morning- switched my modem 3 times, replaced the cable to the modem, added an attenuator and came to the conclusion that something "wasn't right" and that it should be working...

He called someone up and was told that due to the 50mb upgrades in the area were making connections go tits up, then the modem sprang back to life.

Happy that it had "fixed itself" he left. The connection was fine for about 10 minutes and its been spotty ever since!

What a joke!

Re: Awful On Off Connection
 

Been having similar issues. Forgive my ignorance ( new to all this tech stuff, making my grey hair even greyer!) but how do I access these modem logs etc please? Have an ambit 256

Thank you

Re: Awful On Off Connection
 

Open a browser and in the address bar put or click the link > http://192.168.100.1/ the password and username are both root if required.

What I want you to post is the Downstream power levels including the SNR and the Upstream power levels for me thanks.

DO NOT POST YOUR MAC ADDRESS OR SERIAL NUMBER

Re: Awful On Off Connection
 

Thank you Moldova. Detail as requested.

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 4
Upstream Frequency : 29200000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 49.0 dBmV
Upstream Mini-Slot Size : 2


Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 6
Downstream Frequency : 586750000 Hz
Downstream Modulation : QAM64
Downstream Symbol Rate : 6952 Ksym/sec
Downstream Interleave Depth : taps12Increment17
Downstream Receive Power Level : 2.2 dBmV
Downstream SNR : 37.8 dB

Have had one pc connected directly to modem since yesterday with no problem. Just beginning to wonder if it's a flaky modem (netgear wgr614) and/or cable?

Going to leave this pc connected for another couple of days abd then replace with other pc to see what happens.

Thanks you once again.

Re: Awful On Off Connection
 

All power levels are fine for an EX-NTL connection and could well be an issue with the router.

You can get replacement ethernet cables from ASDA for £2.98 and most Pound shops for a £1 and even from Screwfix cheaply as well.

Re: Awful On Off Connection
 

Thank you. May I ask you a couple of further questions pls.

I'm guessing that the upstream transit Power Level and downstream SNR indicate signal strength. Below what levels would I expect a ' weak ' connection/signal?

If when I lose connection the sync & ready lights remain permanently on does this actually imply I have a good signal or could it even be a weak one. Would this imply a fault my side of the modem?

Though my wife's pc is connected directly to the modem at the moment, internet connection apparently kept dropping out this afternoon with sync & Rdy lights on. During this period I happened to be trying to telephone home but kept getting ring tone no reply. I'm beginning to wonder if an intermittent cable fault exists between the cab and my house, primarily alongside a car hard standing. When the cable was laid in the good old days of NTL and contractors no ducting was used and the cable just runs beneath a couple f inches of concrete. Would this seem a possibility to your goodself and hence my questions re weak signal losing connection but still enabling sync & ready lights on the modem.

Your advice is much appreciated and grateful for your thoughts.

Thank you

PS.

What might these event log entries mean please:
Time Not Established Time Not Established Information (7) Locked on the downstream. Waiting for UCDs...
Time Not Established Time Not Established Information (7) Downstream lock ok
Time Not Established Time Not Established Information (7) Sync Start
Time Not Established Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out

Thank you.