Problem with cable modem

[deathtrap3000]

This morning my broadband was working fine. I come home this evening and its not working. Phoned vm and they couldnt fix it and are now sending a technician out. I have narrowed down the problem to the splitter. The tv is working on either of the splitters outputs but the modem will only work if its plugged directly into the connection on the wall.

Can I buy a new splitter (99p) from ebay and just use that? As it will probably arrive before vm come to fix it.

[deathtrap3000]

Does nobody know if those cheap splitters on ebay will work??

[Lord Nikon]

they will, but the problem is more likely to be with the cable feeding your home, or the amp in the street cabinet. The relevant point you make is that without the splitter it works. The splitter reduces the signal strength to the modem, without the splitter you have a more powerful signal and this seems to be the cure.

Are there any additional filters screwed into the modem? they will possibly say 3.5dB Forward Path Attenuator, or be colour coded. If so, try removing one and see if it helps, if not then you are better waiting for the technician who will check and adjust signal levels as necessary.

[calmpitbull]

If the splitter outputs both work for the TV then the problem won't be the splitter.

I think you have a signal issue.

[deathtrap3000]

No other filters on the modem. Ive just screwed it all back in and now its all working again. This is very annoying as its the second time in a week that ive had a technician booked to fix a problem thats fixed itself.

[Lord Nikon]

keep the technician visit, the chances are your signal strength is very low and at the threshold of the power required for the modem. let him check it out regardless.

[calmpitbull]

I agree, don't cancel the visit.

[deathtrap3000]

Thanks for your advice guys. Just hope I dont get charged for wasting the technicians time.

[moaningmags]

The only way you'll get charged is if you're not home.

[Peter_]

Originally Posted by deathtrap3000

Thanks for your advice guys. Just hope I dont get charged for wasting the technicians time.

As you are having issues with your connection the technician will have a fault to sort out, so no time wasted.

[deathtrap3000]

Well the tech came and swapped my ambit 255 modem with a new ambit 256. Said the signal to or from the cab was a bit low and called another tech who came a few mins later to sort the cab. I think everything is ok now assuming that something was wrong in the first place.

[Mick Fisher]

Why not post your signal levels here. There are many who are qualified to give an opinion and advice.

[deathtrap3000]

Hmm that sounds like a good idea. Maybe I should have done that in the first place.

Signal levels before modem moved upstairs.

Downstream
Downstream Lock : Locked
Downstream Channel Id : 27
Downstream Frequency : 298750000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 6952 Ksym/sec
Downstream Interleave Depth : taps12Increment17
Downstream Receive Power Level : -3.1 dBmV
Downstream SNR : 35.1 dB

Upstream
Upstream Lock : Locked
Upstream Channel ID : 4
Upstream Frequency : 45800000 Hz
Upstream Modulation : QPSK
Upstream Symbol Rate : 5120 Ksym/sec
Upstream transmit Power Level : 48.2 dBmV
Upstream Mini-Slot Size : 1


Signal levels after modem change and tech visit.

Downstream
Downstream Lock : Locked
Downstream Channel Id : 0
Downstream Frequency : 586750000 Hz
Downstream Modulation : QAM64
Downstream Symbol Rate : 6952 Ksym/sec
Downstream Interleave Depth : taps12Increment17
Downstream Receive Power Level : -11.1 dBmV
Downstream SNR : 32.0 dB

Upstream
Upstream Lock : Locked
Upstream Channel ID : 2
Upstream Frequency : 25800000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 46.5 dBmV
Upstream Mini-Slot Size : 2

[Welshchris]

hes made it worse LOL!

Downstream power levels majorly to low.

U need to get tjem back

[Ignitionnet]

Any technical type people spotted the oddity in his modem stats yet?