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mmm · 15-06-2004, 21:20

I'm sure I have a similar issue (with a Terayon), but have limped along without having to call out an engineer since the problem I had straight after installation.

I bet it is the upstream which is an issue, the engineers that come out only seem to know how to check the downstream - by plugging in a signal strength meter on the common downstream frequency. Tech support can look at the upstream remotely or you can with DOCSDIAG, and yes this wonders around due to weather/ temperature etc. Basically if the line is poor/ noisy the modem has to shout louder to get heard at the UBR. As the up and down are significantly differrent frequency ranges poor connections/ noise ingress can be very differrent.

I have to run with a very high downstream (+15) to keep the upstream below +50, and the supplied 6dB attenuator has mysteriously gone missing! Big step changes happen when ntl have 'resegmented' my area which has happened twice, before the second time the upstream fell to about +40.

I've also even suggested to ntl that my modem is having to connect to the wrong UBR (because they have my postcode wrong), but hey this has only be going on for 3 years and this is ntl we are talking about!

15-06-2004, 21:20	#7
mmm Inactive Join Date: Jun 2003 Posts: 513	Re: Signal to modem I'm sure I have a similar issue (with a Terayon), but have limped along without having to call out an engineer since the problem I had straight after installation. I bet it is the upstream which is an issue, the engineers that come out only seem to know how to check the downstream - by plugging in a signal strength meter on the common downstream frequency. Tech support can look at the upstream remotely or you can with DOCSDIAG, and yes this wonders around due to weather/ temperature etc. Basically if the line is poor/ noisy the modem has to shout louder to get heard at the UBR. As the up and down are significantly differrent frequency ranges poor connections/ noise ingress can be very differrent. I have to run with a very high downstream (+15) to keep the upstream below +50, and the supplied 6dB attenuator has mysteriously gone missing! Big step changes happen when ntl have 'resegmented' my area which has happened twice, before the second time the upstream fell to about +40. I've also even suggested to ntl that my modem is having to connect to the wrong UBR (because they have my postcode wrong), but hey this has only be going on for 3 years and this is ntl we are talking about!