Large & Fast downloads kills connection

Hi, i've been having a problem for the last month or so. If i fire up a large download at high speed, the connection will die after some time. For instance, downloading the new call of duty which is 100GB at 200MBps will sometimes kill it. I have a Unifi Dream Machine router, connected at 2.5gbs to the CGM4981COM modem in bridge mode. My service is 2000/240. During the outage, i'm still able to login and access my router so i don't believe that's the problem. Xfinity has already swappped out my modem but the problem persists. Below are my modem channels.

Channel ID	4	1	2	3	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	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	447 MHz	429 MHz	435 MHz	441 MHz	453 MHz	459 MHz	465 MHz	471 MHz	477 MHz	483 MHz	489 MHz	495 MHz	501 MHz	507 MHz	513 MHz	519 MHz	525 MHz	531 MHz	537 MHz	543 MHz	549 MHz	555 MHz	561 MHz	567 MHz	573 MHz	579 MHz	585 MHz	591 MHz	597 MHz	603 MHz	609 MHz	615 MHz	957000000
SNR	44.9 dB	45.2 dB	45.1 dB	44.9 dB	44.9 dB	44.9 dB	44.7 dB	44.5 dB	44.6 dB	44.5 dB	44.4 dB	44.3 dB	44.2 dB	44.1 dB	44.0 dB	44.2 dB	44.0 dB	44.0 dB	44.0 dB	44.0 dB	43.8 dB	44.0 dB	43.8 dB	43.7 dB	43.7 dB	43.8 dB	43.8 dB	44.0 dB	43.7 dB	43.9 dB	43.6 dB	43.6 dB	36.7 dB
Power Level	1.3 dBmV	1.6 dBmV	1.4 dBmV	1.3 dBmV	1.0 dBmV	1.0 dBmV	0.8 dBmV	0.7 dBmV	0.7 dBmV	0.5 dBmV	0.4 dBmV	0.2 dBmV	0.0 dBmV	0.2 dBmV	0.2 dBmV	0.2 dBmV	0.2 dBmV	0.2 dBmV	0.1 dBmV	0.1 dBmV	0.2 dBmV	0.1 dBmV	0.2 dBmV	0.2 dBmV	0.2 dBmV	0.3 dBmV	0.1 dBmV	0.1 dBmV	0.2 dBmV	0.2 dBmV	0.4 dBmV	0.6 dBmV	-10.9 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

Channel ID	17	18	19	20	43
Lock Status	Locked	Locked	Locked	Locked	Locked
Frequency	16 MHz	22 MHz	29 MHz	35 MHz	36 MHz
Symbol Rate	5120	5120	5120	5120	0
Power Level	45.0 dBmV	45.5 dBmV	45.8 dBmV	45.8 dBmV	39.7 dBmV
Modulation	QAM	QAM	QAM	QAM	OFDMA
Channel Type	ATDMA	ATDMA	ATDMA	ATDMA	TDMA

Channel ID	4	1	2	3	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	193
Unerrored Codewords	281964151	2644214516	2644222749	2644227352	2644233622	2644236917	2644243433	2644245773	2644253438	2644257758	2644263397	2644268865	2644273305	2644284345	2644288506	2644295905	2644300247	2644306851	2644310760	2644316547	2644321160	2644327426	2644334374	2644340426	2644345651	2644352229	2644356944	2644361600	2644367268	2644372763	2644372935	2644375194	281964151
Correctable Codewords	201604361	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	201604361
Uncorrectable Codewords	8729	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	8729

Responses

Accepted Solution

wmtracy

Visitor

•

5 Messages

1 year ago

No tech came out, i picked up and dropped off the modem myself. I just changed the only splitter in my setup and while i may have better signal, the connection died this morning.

Channel ID	4	1	2	3	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	32	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	447 MHz	429 MHz	435 MHz	441 MHz	453 MHz	459 MHz	465 MHz	471 MHz	477 MHz	483 MHz	489 MHz	495 MHz	501 MHz	507 MHz	513 MHz	519 MHz	525 MHz	531 MHz	537 MHz	543 MHz	549 MHz	555 MHz	561 MHz	567 MHz	573 MHz	579 MHz	585 MHz	591 MHz	597 MHz	603 MHz	609 MHz	615 MHz	957000000
SNR	44.8 dB	45.1 dB	45.0 dB	44.9 dB	44.6 dB	44.5 dB	44.3 dB	44.4 dB	44.4 dB	44.3 dB	44.4 dB	44.4 dB	44.1 dB	44.0 dB	43.9 dB	44.0 dB	44.0 dB	43.9 dB	43.8 dB	43.8 dB	43.8 dB	43.9 dB	43.8 dB	43.8 dB	43.8 dB	43.7 dB	43.9 dB	43.8 dB	43.8 dB	43.8 dB	43.8 dB	43.6 dB	37.5 dB
Power Level	4.9 dBmV	5.3 dBmV	5.2 dBmV	5.0 dBmV	4.5 dBmV	4.5 dBmV	4.3 dBmV	4.2 dBmV	4.2 dBmV	4.1 dBmV	4.1 dBmV	4.0 dBmV	3.7 dBmV	3.6 dBmV	3.4 dBmV	3.4 dBmV	3.4 dBmV	3.3 dBmV	3.4 dBmV	3.4 dBmV	3.4 dBmV	3.7 dBmV	3.6 dBmV	3.6 dBmV	3.5 dBmV	3.5 dBmV	3.6 dBmV	3.7 dBmV	3.5 dBmV	3.6 dBmV	3.4 dBmV	3.3 dBmV	-6.8 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

1

0

XfinityEmilyB

Official Employee

•

2K Messages

@wmtracy Thank you for keeping us posted. Have you tried bypassing the router and hardwiring directly to the modem via ethernet? Are you still having issues while downloading large files?

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer. tick

1 year ago

0

XfinityEva

Official Employee

•

1.6K Messages

1 year ago

@wmtracy Thank you for visiting our Xfinity Community Forums and providing the details of your set-up and results. When we swapped the modem, did we have a chance to go out there and check on the wiring/cable/splitters?

0

wmtracy

Visitor

•

5 Messages

1 year ago

@XfinityEmilyB i tried this last night and it appears the connection is good! must be a problem with the router. Thank you.

1

XfinityAngie

Official Employee

•

1.8K Messages

wmtracy, Thanks for letting us know.

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Please, mark a reply as the Accepted Answer. tick

1 year ago

0

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wmtracy

Large & Fast downloads kills connection

wmtracy

XfinityEmilyB

XfinityEva

wmtracy

XfinityAngie

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