1 Message
Gigabit Speed drops to 400mbps upload stays consistent at 120mbps XB8 modem
Hi over the last couple days I have noticed speed tests drop from 700mbps to 350mbps by the end of the test. When I first got service it was stable at 1000mbps to sometimes 1200mbps. In the last week I have noticed slight interruptions in service that have been enough for me to run a speed test. I have tried a few troubleshooting steps such a resetting the modem to factory settings and moving it to another location in the house. Moving it to another room helped for a bit before experience the same issues. I have a 10Gbps PCIe card and a Wifi 6E phone so there isn't much limitation there. The only thing I could think of is my roommate moved out and cancelled his service, I then signed up under my name he had Gigabit Extra (1200mbps) 250 up. Could this be interference from the old account? It was closed at the end beginning of October. My downstream and upstream seem to be normal to me Downstream is 9.2 dBmV Upstream is 47.0 dBmV. Thanks
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Downstream
|
Channel Bonding Value | ||||||||||||||||||||||||||||||||
| Channel ID |
20
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
32
|
33
|
34
|
35
|
36
|
37
|
38
|
39
|
40
|
41
|
42
|
43
|
44
|
193
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lock Status |
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
Locked
|
| Frequency |
555 MHz
|
513 MHz
|
519 MHz
|
525 MHz
|
531 MHz
|
537 MHz
|
543 MHz
|
549 MHz
|
561 MHz
|
567 MHz
|
573 MHz
|
579 MHz
|
585 MHz
|
591 MHz
|
597 MHz
|
603 MHz
|
609 MHz
|
615 MHz
|
621 MHz
|
627 MHz
|
633 MHz
|
639 MHz
|
645 MHz
|
651 MHz
|
657 MHz
|
663 MHz
|
669 MHz
|
675 MHz
|
681 MHz
|
687 MHz
|
693 MHz
|
699 MHz
|
957000000
|
| SNR |
44.5 dB
|
44.7 dB
|
44.7 dB
|
44.6 dB
|
44.4 dB
|
44.7 dB
|
44.7 dB
|
44.5 dB
|
44.3 dB
|
44.3 dB
|
44.4 dB
|
44.3 dB
|
44.4 dB
|
44.2 dB
|
44.3 dB
|
44.3 dB
|
44.2 dB
|
44.4 dB
|
44.3 dB
|
44.3 dB
|
44.2 dB
|
44.2 dB
|
44.4 dB
|
44.5 dB
|
44.3 dB
|
44.5 dB
|
44.4 dB
|
44.3 dB
|
44.5 dB
|
44.4 dB
|
44.4 dB
|
44.3 dB
|
42.6 dB
|
| Power Level |
9.2 dBmV
|
9.4 dBmV
|
9.2 dBmV
|
9.4 dBmV
|
9.1 dBmV
|
9.4 dBmV
|
9.5 dBmV
|
9.3 dBmV
|
9.2 dBmV
|
9.4 dBmV
|
9.3 dBmV
|
9.1 dBmV
|
9.4 dBmV
|
9.4 dBmV
|
9.5 dBmV
|
9.3 dBmV
|
9.4 dBmV
|
9.4 dBmV
|
9.4 dBmV
|
9.4 dBmV
|
9.3 dBmV
|
9.3 dBmV
|
9.6 dBmV
|
9.8 dBmV
|
9.6 dBmV
|
9.6 dBmV
|
9.8 dBmV
|
9.9 dBmV
|
9.8 dBmV
|
9.7 dBmV
|
9.7 dBmV
|
9.8 dBmV
|
6.1 dBmV
|
| Modulation |
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
256 QAM
|
OFDM
|
|
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XfinityJamesC
Official Employee
•
2.1K Messages
1 year ago
Greetings, @user_c2y2ea! I hope your week has been treating you well. Thanks so much for taking a moment out of your busy day to leave a post on our community forum. I'm sorry to hear you're having issues with your connection, but you have definitely come to the right place for assistance.
I don't think you would necessarily be seeing interference from a previous account, but if you just installed a new modem at a location that was previously testing fine, there could be a provisioning issue with the new modem, especially if your area was recently experiencing service interruptions.
If you could send our team a direct message with your full name, the name listed on the account (if different), and the service address associated with your account, I'd be more than happy to look into this for you.
To send a Direct Message, please click on the “Direct Message” icon in the top-right corner of the screen, next to the bell icon, click the "New message" (pencil and paper) icon, then type or select "Xfinity Support". Type your message in the text area near the bottom of the window and press Enter to send your message and initiate a live session.
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