Intermittent no broadband (upstream not locked)

[Mike RB]

Hi,

I have posted a question asking if anyone else in the RG6 area of Reading has been having broadband problems. I am guessing by the lack of replies that no one else is having problems.

Again today, I lost broadband and the light flashed on the Samsung TV STB.

Now, the broadband is now back as is the light steady on the cable box.

My levels are as follows on the modem:

Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : 1.0 dBmV
Downstream SNR : 39.8 dB
Upstream transmit Power Level : 54.0 dBmV

I did notice that if I remove the splitter and connect the modem directly to the wall then it works fine. I do have another splitter and this produced the same results...

So, I am now thinking that I am on the threshold of losing my service due to cable modem levels and the splitter pushes it over the edge. Does this sound plausible?

It's working now, but it seems to go down for hours at a time every other day. Anything I can try before I book an engineer?

Many thanks.

[Toto]

Originally Posted by Mike RB

Hi,

I have posted a question asking if anyone else in the RG6 area of Reading has been having broadband problems. I am guessing by the lack of replies that no one else is having problems.

Again today, I lost broadband and the light flashed on the Samsung TV STB.

Now, the broadband is now back as is the light steady on the cable box.

My levels are as follows on the modem:

Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : 1.0 dBmV
Downstream SNR : 39.8 dB
Upstream transmit Power Level : 54.0 dBmV

I did notice that if I remove the splitter and connect the modem directly to the wall then it works fine. I do have another splitter and this produced the same results...

So, I am now thinking that I am on the threshold of losing my service due to cable modem levels and the splitter pushes it over the edge. Does this sound plausible?

It's working now, but it seems to go down for hours at a time every other day. Anything I can try before I book an engineer?

Many thanks.

I'd get the engineer in if I were you, you seem to have diagnosed the problem at the splitter, let them work out how to fix it.

[Mick Fisher]

Originally Posted by Mike RB

I did notice that if I remove the splitter and connect the modem directly to the wall then it works fine. I do have another splitter and this produced the same results...

That sounds uncannilly like the problem I had. It took a good few months to fix as it always seemed to right itself in time for the engineer's visit, and of course he was shrugging his shoulders and out of the door within 5 minutes . Eventually it stayed broke and I got a good engineer, one who actually had a tool box when he called .
He went straight to the splitter on the cable and removed it. Then replaced the splitter in the wall box and connected the BB and DTV direct to the wall box. My upstream level went from 61 to 48 directly and I have had NO problems at all since . The install is now much neater as well. 10/10 to that engineer .

Originally Posted by Mike RB

So, I am now thinking that I am on the threshold of losing my service due to cable modem levels and the splitter pushes it over the edge. Does this sound plausible?

Probably just the splitter is faulty.

Originally Posted by Mike RB

It's working now, but it seems to go down for hours at a time every other day. Anything I can try before I book an engineer?

Many thanks.

Substitute your spare splitter and see if it resolves the issue. Also see if your upstream level falls a bit with the substitute splitter in use.