Upload speeds drop - even during quiet hours

[fffttt111]

Hi

I'm experiencing a some issues with my upload speeds. Even during quiet hours it can drop under 50mbs.
Modem mode, connected to my own router over 2.5gbps. I've noticed my upstream modulation is QAM 32. Could this be an indication of a problem?

+3db booster on modem, tried without but made it worse.

https://www.thinkbroadband.com/broadband/monitoring/quality/share/378879c7b69f4cd9031bd5e299647b06f424a17d

Downstream bonded channels

Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID

1	331000000	2.8	41	QAM 256	25
2	179000000	3.6	42	QAM 256	6
3	187000000	3.5	42	QAM 256	7
4	195000000	3.6	42	QAM 256	8
5	203000000	3.6	42	QAM 256	9
6	211000000	3.8	42	QAM 256	10
7	219000000	3.9	42	QAM 256	11
8	227000000	3.8	42	QAM 256	12
9	235000000	3.8	42	QAM 256	13
10	243000000	3.7	42	QAM 256	14
11	251000000	3.6	42	QAM 256	15
12	259000000	3.5	42	QAM 256	16
13	267000000	3.3	42	QAM 256	17
14	275000000	3.1	42	QAM 256	18
15	283000000	3.1	41	QAM 256	19
16	291000000	3.2	41	QAM 256	20
17	299000000	3.2	41	QAM 256	21
18	307000000	3.2	41	QAM 256	22
19	315000000	3.1	41	QAM 256	23
20	323000000	3	41	QAM 256	24
21	339000000	2.9	41	QAM 256	26
22	347000000	2.8	41	QAM 256	27
23	355000000	2.7	41	QAM 256	28
24	363000000	3	41	QAM 256	29
25	371000000	3.1	41	QAM 256	30
26	379000000	3.4	41	QAM 256	31
27	387000000	3.3	41	QAM 256	32
28	491000000	2.5	41	QAM 256	33
29	499000000	2.3	41	QAM 256	34
30	507000000	1.9	41	QAM 256	35
31	515000000	1.9	41	QAM 256	36

Downstream bonded channels

Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors

1	Locked	41	0	0
2	Locked	42	0	0
3	Locked	42	0	0
4	Locked	42	0	0
5	Locked	42	0	0
6	Locked	42	0	0
7	Locked	42	0	0
8	Locked	42	0	0
9	Locked	42	0	0
10	Locked	42	0	0
11	Locked	42	0	0
12	Locked	42	0	0
13	Locked	42	0	0
14	Locked	42	1	0
15	Locked	41	0	0
16	Locked	41	0	0
17	Locked	41	0	0
18	Locked	41	0	0
19	Locked	41	0	0
20	Locked	41	0	0
21	Locked	41	0	0
22	Locked	41	0	0
23	Locked	41	0	0
24	Locked	41	0	0
25	Locked	41	0	0
26	Locked	41	0	0
27	Locked	41	0	0
28	Locked	41	0	0
29	Locked	41	1	0
30	Locked	41	1	0
31	Locked	41	4	0

Upstream bonded channels

Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID

0	49600000	52	5120	QAM 32	1
1	43100000	51.5	5120	QAM 32	2
2	36600000	51.3	5120	QAM 32	3
3	30100000	50.8	5120	QAM 32	4
4	23600000	50.3	5120	QAM 32	5

Upstream bonded channels

Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts

0	ATDMA	0	0	0	0
1	ATDMA	0	0	0	0
2	ATDMA	0	0	0	0
3	ATDMA	0	0	0	0
4	ATDMA	0	0	0	0

Time Priority Description

18-06-2023 01:05:54	notice	REGISTRATION COMPLETE - Waiting for Operational status
18-06-2023 01:05:45	notice	DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-06-2023 01:05:41	notice	TLV-11 - unrecognized OID;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-06-2023 01:05:39	warning	DHCP WARNING - Non-critical field invalid in response ;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-06-2023 01:05:37	notice	Honoring MDD; IP provisioning mode = IPv4
18-06-2023 01:05:18	critical	SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=**:**:**:**:**:**;CMTS-MAC=**:**:**:**:**:**;CM-QOS=1.1;CM-VER=3.1;
18-06-2023 01:05:01	critical	Cable Modem reboot from UI

[Lee_R]

Hi @fffttt111 thanks for posting and welcome to our community.

Sorry to hear that you're having issues with your upload speeds. And sorry for any inconvenience this may be causing you. As you've already tried the hub without a 3rd party hub (in router mode) and this has made no improvement, we've checked our systems from here.  We need to arrange to send a technician. I am going to send you a private message. Please keep an eye on your inbox in the top right of your screen.

Regards

Lee_R