I have been having connection issues with my internet and have had technicain out on 4/9/2020 and they said no issue detected. The replaced the ends of the cables and tested the signal. They also installed a "filter" which has a ground he said and removed the grounding block that was there. No splitters are in play as I only have internet. Before the tech came out I was getting t3 and t4 timeouts in my modem log. I cleared my event log and I am already getting these again and having issues.
I have also battled this for sometime I am on my second new modem coming from a motorola sb6183, purchased a netgear modem and returned and now I am using a MB7621. It is such a huge pain to call cupport and get the run around and then to have a tech come out and say there is not a problem.
| Fri Apr 10 20:19:44 2020 |
Critical (3) |
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC
|
| Fri Apr 10 20:19:44 2020 |
Critical (3) |
Unicast Maintenance Ranging attempted - No response - Retries exhausted
|
| Fri Apr 10 20:19:44 2020 |
Critical (3) |
16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC |
| Sat Apr 11 00:16:42 2020 |
Critical (3) |
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC |
| Downstream Bonded Channels |
|
|
|
|
| Channel |
Lock Status |
Modulation |
Channel ID |
Freq. (MHz) |
Pwr (dBmV) |
SNR (dB) |
Corrected |
Uncorrected |
| 1 |
Locked |
QAM256 |
9 |
531.0 |
8.7 |
40.1 |
146 |
95 |
| 2 |
Locked |
QAM256 |
33 |
459.0 |
7.1 |
40.0 |
175 |
111 |
| 3 |
Locked |
QAM256 |
34 |
465.0 |
7.1 |
40.0 |
176 |
131 |
| 4 |
Locked |
QAM256 |
35 |
471.0 |
7.1 |
40.0 |
212 |
94 |
| 5 |
Locked |
QAM256 |
36 |
477.0 |
6.9 |
39.9 |
219 |
136 |
| 6 |
Locked |
QAM256 |
1 |
483.0 |
6.9 |
40.0 |
179 |
159 |
| 7 |
Locked |
QAM256 |
2 |
489.0 |
7.1 |
40.0 |
168 |
191 |
| 8 |
Locked |
QAM256 |
3 |
495.0 |
7.4 |
39.4 |
186 |
75 |
| 9 |
Locked |
QAM256 |
4 |
501.0 |
7.6 |
39.1 |
203 |
81 |
| 10 |
Locked |
QAM256 |
5 |
507.0 |
7.9 |
35.4 |
196 |
75 |
| 11 |
Locked |
QAM256 |
6 |
513.0 |
8.1 |
39.0 |
125 |
74 |
| 12 |
Locked |
QAM256 |
7 |
519.0 |
8.3 |
40.0 |
116 |
109 |
| 13 |
Locked |
QAM256 |
8 |
525.0 |
8.7 |
40.1 |
134 |
155 |
| 14 |
Locked |
QAM256 |
10 |
537.0 |
8.8 |
40.1 |
117 |
113 |
| 15 |
Locked |
QAM256 |
11 |
543.0 |
8.8 |
40.0 |
146 |
87 |
| 16 |
Locked |
QAM256 |
12 |
549.0 |
8.7 |
40.0 |
105 |
108 |
| 17 |
Locked |
QAM256 |
13 |
555.0 |
9.2 |
41.5 |
116 |
155 |
| 18 |
Locked |
QAM256 |
14 |
561.0 |
9.1 |
41.5 |
98 |
151 |
| 19 |
Locked |
QAM256 |
15 |
567.0 |
9.3 |
41.5 |
78 |
154 |
| 20 |
Locked |
QAM256 |
16 |
573.0 |
9.4 |
41.0 |
66 |
146 |
| 21 |
Locked |
QAM256 |
17 |
579.0 |
9.5 |
41.3 |
88 |
148 |
| 22 |
Locked |
QAM256 |
18 |
585.0 |
9.5 |
40.8 |
76 |
149 |
| 23 |
Locked |
QAM256 |
19 |
591.0 |
9.8 |
41.2 |
76 |
141 |
| 24 |
Locked |
QAM256 |
20 |
597.0 |
10.0 |
41.1 |
89 |
151 |
| Total |
|
|
|
|
|
|
3290 |
2989 |
|
|
|
| Channel |
Lock Status |
Channel Type |
Channel ID |
Symb. Rate (Ksym/sec) |
Freq. (MHz) |
Pwr (dBmV) |
| 1 |
Locked |
ATDMA |
3 |
5120 |
23.0 |
46.0 |
| 2 |
Locked |
ATDMA |
1 |
5120 |
35.8 |
48.8 |
| 3 |
Locked |
ATDMA |
2 |
5120 |
29.4 |
48.0 |
| 4 |
Not Locked |
Unknown |
0 |
0 |
0 |
0.0 |
| 5 |
Not Locked |
Unknown |
0 |
0 |
0 |
0.0 |
| 6 |
Not Locked |
Unknown |
0 |
0 |
0 |
0.0 |
| 7 |
Not Locked |
Unknown |
0 |
0 |
0 |
0.0 |
| 8 |
Not Locked |
Unknown |
0 |
0 |
0 |
0.0 |
|
csun513
Regular Visitor
•
5 Messages
5 years ago
Do Xfinity employees read this forum? I am still having issue and just had another t4 timeout and completeley dropped my internet while I was working. I am also only connecting to once channel on the upload side.
0
0
EG
Expert
•
111.5K Messages
5 years ago
The upstream power is approaching the high end of being in spec but it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, and latency problems.
If there is nothing that can be done to improve the connection / obtain more wiggle room, you have no choice but to get the techs involved again until it is fixed properly.
Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home.
Good luck with it !
.
0
0
csun513
Regular Visitor
•
5 Messages
5 years ago
0