We have a CODA-4582U modem in bridge mode with Gigabit Internet service. For the past few weeks we have been seeing reduced download speeds, higher latency and dropped packets. When I look at the modem signals I think I know why. The signals look quite bad (see below). The modem was recently upgraded to firmware 7.2.4.1.4b15 though I don't know if that is a factor.
We tried calling Rogers support but they were not helpful. It seems their agents no longer check modem signals (or even know what that is).
How can I get this resolved?
Thanks,
John
DOCSIS WAN
This menu displays both upstream and downstream signal parameters
DOCSIS Overview
| Network Access |
Permitted |
| IP Address |
|
| Subnet Mask |
|
| Gateway IP Address |
|
| DHCP Lease Time |
😧6 H: 23 M: 43 S: 42 |
Downstream Overview
| Port ID |
Frequency (Hz) |
Modulation |
Signal strength (dBmV) |
Channel ID |
Signal noise ratio (dB) |
Bytes |
Correcteds |
Uncorrectables |
| 1 |
591000000 |
QAM256 |
-4.900 |
7 |
37.636 |
165459050 |
0 |
0 |
| 2 |
597000000 |
QAM256 |
-6.099 |
8 |
36.386 |
16106682 |
0 |
0 |
| 3 |
603000000 |
QAM256 |
-9.599 |
9 |
36.609 |
16548923 |
0 |
0 |
| 4 |
609000000 |
QAM256 |
-10.099 |
10 |
35.779 |
15832008 |
0 |
0 |
| 5 |
849000000 |
QAM256 |
-19.299 |
2 |
28.498 |
21392305 |
0 |
0 |
| 6 |
|
QAM256 |
false |
0 |
false |
0 |
0 |
0 |
| 7 |
|
QAM256 |
false |
0 |
false |
0 |
0 |
0 |
| 8 |
579000000 |
QAM256 |
-5.799 |
5 |
37.355 |
16807216 |
0 |
0 |
| 9 |
585000000 |
QAM256 |
-4.900 |
6 |
37.636 |
16883466 |
0 |
0 |
| 10 |
279000000 |
QAM256 |
-2.500 |
1 |
37.636 |
17508506 |
0 |
0 |
| 11 |
615000000 |
QAM256 |
-8.700 |
11 |
36.609 |
15916696 |
0 |
0 |
| 12 |
621000000 |
QAM256 |
-9.599 |
12 |
35.083 |
15459851 |
0 |
0 |
| 13 |
633000000 |
QAM256 |
-6.299 |
13 |
37.636 |
16442112 |
0 |
0 |
| 14 |
639000000 |
QAM256 |
-8.200 |
14 |
36.609 |
16662471 |
0 |
0 |
| 15 |
645000000 |
QAM256 |
-7.900 |
15 |
35.779 |
15561075 |
0 |
0 |
| 16 |
651000000 |
QAM256 |
-11.099 |
16 |
35.083 |
16519823 |
0 |
0 |
| 17 |
657000000 |
QAM256 |
-11.400 |
17 |
34.483 |
15811492 |
0 |
0 |
| 18 |
663000000 |
QAM256 |
-10.799 |
18 |
35.595 |
15975442 |
0 |
0 |
| 19 |
669000000 |
QAM256 |
-13.000 |
19 |
33.486 |
15862780 |
0 |
0 |
| 20 |
675000000 |
QAM256 |
-11.400 |
20 |
34.925 |
15918882 |
0 |
0 |
| 21 |
681000000 |
QAM256 |
-11.099 |
21 |
35.083 |
16447232 |
0 |
0 |
| 22 |
687000000 |
QAM256 |
-10.900 |
22 |
34.925 |
15865161 |
0 |
0 |
| 23 |
693000000 |
QAM256 |
-8.500 |
23 |
36.609 |
15594342 |
0 |
0 |
| 24 |
699000000 |
QAM256 |
-7.000 |
24 |
37.636 |
15964303 |
0 |
0 |
| 25 |
705000000 |
QAM256 |
-11.200 |
25 |
34.345 |
16188317 |
0 |
0 |
| 26 |
711000000 |
QAM256 |
-13.799 |
26 |
33.062 |
16357617 |
0 |
0 |
| 27 |
717000000 |
QAM256 |
-10.299 |
27 |
35.779 |
16636671 |
0 |
0 |
| 28 |
723000000 |
QAM256 |
-10.400 |
28 |
35.595 |
19384613 |
0 |
0 |
| 29 |
825000000 |
QAM256 |
-19.500 |
29 |
28.498 |
20291140 |
0 |
0 |
| 30 |
831000000 |
QAM256 |
-17.299 |
30 |
30.420 |
20327834 |
0 |
0 |
| 31 |
837000000 |
QAM256 |
-19.099 |
31 |
28.790 |
21348735 |
0 |
0 |
| 32 |
|
QAM256 |
false |
0 |
false |
0 |
0 |
0 |
| Reset FEC Counters |
OFDM Downstream Overview
| Receiver |
FFT type |
Subcarr 0 Frequency(MHz) |
PLC locked |
NCP locked |
MDC1 locked |
PLC Location |
Occupied BW(MHz) |
Subcarriers |
PLC power(dBmv) |
| 0 |
NA |
NA |
NO |
NO |
NO |
NA |
0 ~ 0 |
NA |
NA |
| 1 |
4K |
275600000 |
YES |
YES |
YES |
1544 |
283 ~ 472.95 |
3736 |
-0.299999 |
Upstream Overview
| Port ID |
Frequency (Hz) |
Modulation |
Signal strength (dBmV) |
Channel ID |
Bandwidth |
| 1 |
32300000 |
64QAM |
39.020 |
7 |
6400000 |
| 2 |
38700000 |
64QAM |
39.020 |
8 |
6400000 |
| 3 |
21100000 |
64QAM |
36.010 |
5 |
3200000 |
| 4 |
25900000 |
64QAM |
37.770 |
6 |
6400000 |
OFDMA Overview
| Channel Index |
State |
lin Digital Att |
Digital Att |
BW (sc's*fft) |
Report Power |
Report Power1_6 |
FFT Size |
| 0 |
DISABLED |
0.0000 |
0.0000 |
0.0000 |
0.0000 |
0.0000 |
2K |
| 1 |
DISABLED |
0.0000 |
0.0000 |
0.0000 |
0.0000 |
0.0000 |
2K |
*** Edited Labels ***
