Very slow upload & high ping all day

[csongor]

Hello, (sorry for not writing in German, I've just started learning the language)
I'm experiencing very slow upload (4mbit instead of 12mbit) and high and inconsistent pings. I'd like to report this as a fault.

The time of the day does not matter, it is slow and incosistent day and night. There are no problems with my download speed, it is usually around 120-130mbit/sec. My connection is wired ethernet directly to the provided cable router/modem.

Modem values:

Output of pinging the next hop after my modem:

Pinging ip5b4077fe.dynamic.kabel-deutschland.de [91.64.119.254] with 32 bytes of data:
Reply from 91.64.119.254: bytes=32 time=26ms TTL=63
Reply from 91.64.119.254: bytes=32 time=80ms TTL=63
Reply from 91.64.119.254: bytes=32 time=37ms TTL=63
Reply from 91.64.119.254: bytes=32 time=28ms TTL=63
Reply from 91.64.119.254: bytes=32 time=62ms TTL=63
Reply from 91.64.119.254: bytes=32 time=24ms TTL=63
Reply from 91.64.119.254: bytes=32 time=57ms TTL=63
Reply from 91.64.119.254: bytes=32 time=35ms TTL=63
Reply from 91.64.119.254: bytes=32 time=48ms TTL=63
Reply from 91.64.119.254: bytes=32 time=49ms TTL=63
Reply from 91.64.119.254: bytes=32 time=28ms TTL=63
Reply from 91.64.119.254: bytes=32 time=100ms TTL=63
Reply from 91.64.119.254: bytes=32 time=50ms TTL=63
Reply from 91.64.119.254: bytes=32 time=47ms TTL=63
Reply from 91.64.119.254: bytes=32 time=33ms TTL=63
Reply from 91.64.119.254: bytes=32 time=90ms TTL=63

Looking forward to your reply.

[Claudia]

Hello csongor,

as you already provided the key facts I'd like to check your connection. I need your name, address and the date of birth of the contractual partner. Please send me this data in a private message and reply again here in this thread.

Kind regards

Claudia

[csongor]

Hello,

Thank you for your help.
I've sent you the requested data in a private message.

[Claudia]

Hello csongor,

sorry, I forgot to ask for your customer number . If you send it in a private message as well I can check your access.

Kind regards,

Claudia

[csongor]

Done.

[Claudia]

Hello csongor,  

thank you, now I've got all the data I need so I could check your access. However, I didn't find anything suspicious, the signal is good and the utilisation is low enough to guarantee the full upload speed each time of the day. Did you check if any device or software might cause a constant usage of the upstreams? You could start by only connecting one device and disable all software.

Kind regards

Claudia

[csongor]

Hello,

Thanks for looking into this.
Now everything seems perfect (I booted up a ubuntu live usb environment and checked the ping and the speeds there). I'll try it in the evening and will report back, maybe this only happens in the evening (between 20:00 and 21:00).

[csongor]

There's one difference though: When I reported the issue, the Upstream Channels used 32QAM modulation, now all four uses 64QAM modulation. Wouldn't the 32QAM modulation indicate some sort of signal fault or upstream channel disturbance?

[Claudia]

Hi csongor,

good thing that the speed got better :). QAM 32  doesn't necessarily mean that you will notice an error. Did the line work well since yesterday?

Kind regards

Claudia

[csongor]

Hi,
The connection has been excellent since I reported the fault. I'll check again on weekend in peak times to see if the connection is still okay.