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Formwork

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Very slow speeds

I recently bought an Arris  SB6138 Modem and replaced my old modem.  I'm not sure what speeds I was getting on the old one, but the new one fluctuates wildly between 17 Mbps and (rarely) 120 Mbps.  This occurs whether I connect (wired) through my wireless router or directly into the new modem (completely disconnecting the router).  

I'm paying for the 150/10 service, and I already called Cox and gave them the MAC and S/N for the modem, so that step has been done.  Any thoughts on why my speed isn't correct?

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Tecknowhelp

Valued Contributor II

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2.8K Messages

Can you post your signal levels from 192.168.100.1?

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Formwork

New Contributor

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4 Messages

I'm not sure if this is what you are looking for, but here are the bonded channels.  If this isn't the correct info, I apologize.  Either way, I'll have to continue the trouble-shooting after work today.  I didn't think I'd get this quick of a response!

Downstream Bonded Channels
Channel Lock Status Modulation Channel ID Frequency Power SNR Corrected Uncorrectables
1 Locked QAM256 54 975000000 Hz -1.1 dBmV 39.3 dB 0 0
2 Locked QAM256 9 849000000 Hz -0.9 dBmV 39.6 dB 0 0
3 Locked QAM256 10 855000000 Hz -0.3 dBmV 39.7 dB 0 0
4 Locked QAM256 11 861000000 Hz -0.3 dBmV 39.2 dB 0 0
5 Locked QAM256 12 867000000 Hz -0.7 dBmV 39.6 dB 0 0
6 Locked QAM256 13 873000000 Hz -1.0 dBmV 39.6 dB 0 0
7 Locked QAM256 14 879000000 Hz -1.0 dBmV 39.5 dB 0 0
8 Locked QAM256 15 885000000 Hz -0.8 dBmV 39.6 dB 0 0
9 Locked QAM256 16 891000000 Hz -1.1 dBmV 39.5 dB 0 0
10 Locked QAM256 49 945000000 Hz -1.0 dBmV 39.4 dB 0 0
11 Locked QAM256 50 951000000 Hz -1.2 dBmV 39.3 dB 0 0
12 Locked QAM256 51 957000000 Hz -1.2 dBmV 39.4 dB 0 0
13 Locked QAM256 52 963000000 Hz -1.3 dBmV 39.4 dB 0 0
14 Locked QAM256 53 969000000 Hz -1.0 dBmV 39.5 dB 0 0
15 Locked QAM256 55 981000000 Hz -1.7 dBmV 39.2 dB 0 0
16 Locked QAM256 56 987000000 Hz -2.1 dBmV 38.9 dB 259 0

Upstream Bonded Channels
Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power
1 Locked ATDMA 4 5120 Ksym/sec 36300000 Hz 39.9 dBmV
2 Locked TDMA and ATDMA 1 2560 Ksym/sec 18400000 Hz 36.9 dBmV
3 Locked ATDMA 2 5120 Ksym/sec 23300000 Hz 37.4 dBmV
4 Locked ATDMA 3 5120 Ksym/sec 29800000 Hz 38.4 dBmV

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Tecknowhelp

Valued Contributor II

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2.8K Messages

Signal levels look good. One thing to check is see what your signal levels are before and during the slow downs. 

Also, what is the connection rate between modem and PC? You can find out by right clicking on your local area connection and clicking on status.

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Formwork

New Contributor

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4 Messages

I can check that this evening.  However, is there anything that would cause the speeds to change so wildly?  Last night I was getting 40 Mbps, but did have it spike (on two speed tests) up to 120 Mbps.  This morning I was at 17.  I was running speed tests every few minutes for more than an hour last night, and there was no consistency at all.

Oh, and thanks for your help on this.  Very much appreciated.

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DerrickW

Valued Contributor

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1.2K Messages

@Formwork

Do you have a wireless router involved in your internet setup?  Have you tested the speeds directly connected to the router and/or the cable modem? We can check the signal levels from our end as well.  Please send an email to cox.help@cox.com with the account information.  

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Formwork

New Contributor

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I have a wireless router, but I've been testing the speeds with my desktop plugged directly into the modem and it's still very slow.  I've sent an email to the address you list, so hopefully someone is able to help.

Thanks,

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DerrickW

Valued Contributor

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1.2K Messages

Thanks, I will check for the email now. 

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