Hi - I have a 500 Mpbs plan and generally get good speeds but face unstable internet throughout the day with drops and vast reductions in speeds for a couple minutes at a time. I have a Netgear CM1150V. Here is the report on the connection from the modem below. Any advice?
Frequency start Value |
This field below allows you to modify the frequency the cable modem start with its scan during initialization and registration. Enter the new start frequency and restart the cable modem for it to take effect. |
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|
Startup Procedure |
Procedure |
Status |
Comment |
Acquire Downstream Channel |
603000000 Hz |
Locked |
Connectivity State |
OK |
Operational |
Boot State |
OK |
Operational |
Security |
Enabled |
BPI+ |
IP Provisioning Mode |
Honor MDD |
honorMdd(4) |
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|
Downstream Bonded Channels |
Channel |
Lock Status |
Modulation |
Channel ID |
Frequency |
Power |
SNR |
Correctables |
Uncorrectables |
1 |
Locked |
QAM256 |
32 |
603000000 Hz |
-5.2 dBmV |
38.4 dB |
5050134 |
1495290 |
2 |
Locked |
QAM256 |
17 |
513000000 Hz |
-2.9 dBmV |
39.9 dB |
364 |
296 |
3 |
Locked |
QAM256 |
18 |
519000000 Hz |
-3.1 dBmV |
39.9 dB |
385 |
278 |
4 |
Locked |
QAM256 |
19 |
525000000 Hz |
-3 dBmV |
39.9 dB |
290 |
72 |
5 |
Locked |
QAM256 |
20 |
531000000 Hz |
-3.2 dBmV |
39.8 dB |
291 |
39 |
6 |
Locked |
QAM256 |
21 |
537000000 Hz |
-2.9 dBmV |
39.8 dB |
397 |
91 |
7 |
Locked |
QAM256 |
22 |
543000000 Hz |
-3 dBmV |
39.7 dB |
545 |
162 |
8 |
Locked |
QAM256 |
23 |
549000000 Hz |
-3.2 dBmV |
39.7 dB |
472 |
187 |
9 |
Locked |
QAM256 |
24 |
555000000 Hz |
-2.9 dBmV |
39.6 dB |
475 |
212 |
10 |
Locked |
QAM256 |
25 |
561000000 Hz |
-3.1 dBmV |
39.5 dB |
439 |
48 |
11 |
Locked |
QAM256 |
26 |
567000000 Hz |
-3 dBmV |
39.5 dB |
485 |
42 |
12 |
Locked |
QAM256 |
27 |
573000000 Hz |
-3 dBmV |
39.5 dB |
636 |
38 |
13 |
Locked |
QAM256 |
28 |
579000000 Hz |
-3.4 dBmV |
39.3 dB |
663 |
39 |
14 |
Locked |
QAM256 |
29 |
585000000 Hz |
-3.6 dBmV |
39.2 dB |
725 |
37 |
15 |
Locked |
QAM256 |
30 |
591000000 Hz |
-4.3 dBmV |
39 dB |
649 |
37 |
16 |
Locked |
QAM256 |
31 |
597000000 Hz |
-5 dBmV |
38.8 dB |
651 |
44 |
17 |
Locked |
QAM256 |
33 |
609000000 Hz |
-5.3 dBmV |
38.4 dB |
968 |
46 |
18 |
Locked |
QAM256 |
34 |
615000000 Hz |
-4.4 dBmV |
38.8 dB |
972 |
39 |
19 |
Locked |
QAM256 |
35 |
621000000 Hz |
-3.9 dBmV |
38.9 dB |
844 |
33 |
20 |
Locked |
QAM256 |
36 |
627000000 Hz |
-3.6 dBmV |
38.9 dB |
847 |
37 |
21 |
Locked |
QAM256 |
37 |
633000000 Hz |
-3 dBmV |
39 dB |
850 |
42 |
22 |
Locked |
QAM256 |
38 |
639000000 Hz |
-3.1 dBmV |
39 dB |
757 |
37 |
23 |
Locked |
QAM256 |
39 |
645000000 Hz |
-2.8 dBmV |
39 dB |
570 |
41 |
24 |
Locked |
QAM256 |
40 |
651000000 Hz |
-3.4 dBmV |
38.8 dB |
767 |
42 |
25 |
Locked |
QAM256 |
41 |
657000000 Hz |
-3.9 dBmV |
38.7 dB |
694 |
42 |
26 |
Locked |
QAM256 |
42 |
663000000 Hz |
-3.6 dBmV |
38.7 dB |
878 |
43 |
27 |
Locked |
QAM256 |
43 |
669000000 Hz |
-4 dBmV |
38.5 dB |
959 |
119 |
28 |
Locked |
QAM256 |
44 |
675000000 Hz |
-3.8 dBmV |
38.2 dB |
1056 |
163 |
29 |
Locked |
QAM256 |
45 |
681000000 Hz |
-3.8 dBmV |
38.5 dB |
908 |
156 |
30 |
Locked |
QAM256 |
46 |
687000000 Hz |
-4.1 dBmV |
38.4 dB |
970 |
115 |
31 |
Locked |
QAM256 |
47 |
693000000 Hz |
-3.6 dBmV |
38.6 dB |
830 |
124 |
32 |
Not Locked |
Unknown |
0 |
0 Hz |
0.0 dBmV |
0.0 dB |
0 |
0 |
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Upstream Bonded Channels |
Channel |
Lock Status |
US Channel Type |
Channel ID |
Symbol Rate |
Frequency |
Power |
1 |
Locked |
ATDMA |
1 |
5120 Ksym/sec |
19300000 Hz |
48.3 dBmV |
2 |
Locked |
ATDMA |
2 |
5120 Ksym/sec |
25700000 Hz |
48.5 dBmV |
3 |
Locked |
ATDMA |
3 |
5120 Ksym/sec |
32300000 Hz |
48.5 dBmV |
4 |
Locked |
ATDMA |
4 |
5120 Ksym/sec |
38700000 Hz |
48.5 dBmV |
5 |
Not Locked |
Unknown |
0 |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
6 |
Not Locked |
Unknown |
0 |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
7 |
Not Locked |
Unknown |
0 |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
8 |
Not Locked |
Unknown |
0 |
0 Ksym/sec |
0 Hz |
0.0 dBmV |
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|
Downstream OFDM Channels |
Channel |
Lock Status |
Modulation / Profile ID |
Channel ID |
Frequency |
Power |
SNR / MER |
Active Subcarrier Number Range |
Unerrored Codewords |
Correctable Codewords |
Uncorrectable Codewords |
1 |
Locked |
0 ,1 ,2 ,3 |
48 |
850000000 Hz |
-7.4 dBmV |
35.8 dB |
1348 ~ 2747 |
4740107085 |
4266588082 |
18561 |
2 |
Not Locked |
0 |
0 |
0 Hz |
0 dBmV |
0.0 dB |
0 ~ 4095 |
0 |
0 |
0 |
|
|
Upstream OFDMA Channels |
Channel |
Lock Status |
Modulation / Profile ID |
Channel ID |
Frequency |
Power |
1 |
Not Locked |
0 |
0 |
0 Hz |
0 dBmV |
2 |
Not Locked |
0 |
0 |
0 Hz |
0 dBmV |
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EG
Expert
•
103.5K Messages
4 years ago
The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. The downstream power is a bit on the weak side as well. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.
In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test
If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed, and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.
0
0
APGoel
Regular Visitor
•
3 Messages
4 years ago
removed the splitter and directly connected the line to the modem. These are my numbers below. will this be more stable? The splitter was installed a couple years ago by XFinity. Not a cheap radioshack model.
Status
Profile ID
ID
MER
Number Range
Codewords
Codewords
Codewords
0
0