Hi,
I've been having connectivty to the internet drop 4-5 times a day, for about 30 seconds or so each time on all devices wired and wireless (and WIFI stays connected, just lost of internet connectivity), so I'm pretty sure it's a problem between the xfinity gateway and the street/internet. It's a XB3.
I finally got around to logging in to the gateway, and hit the "system logs take a minute to gather and then don't show anything" problem I've seen multiple posts about, so that's not helpful.
I looked at the power levels, and saw:
Upstream | Channel Bonding Value |
| Index | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| Lock Status | Locked | Locked | Locked | Locked | Not Locked | Not Locked | Not Locked | Not Locked | |
| Frequency | 17.30 MHz | 23.70 MHz | 30.10 MHz | 36.50 MHz | | | | | |
| Symbol Rate | 5120 KSym/s | 5120 KSym/s | 5120 KSym/s | 5120 KSym/s | | | | | |
| Power Level | 43.00 dBmV | 43.00 dBmV | 43.00 dBmV | 43.00 dBmV | | | | | |
| Modulation | 64 QAM | 64 QAM | 64 QAM | 64 QAM | | | | | |
| Channel Type | DOCSIS2.0 (ATDMA) | DOCSIS2.0 (ATDMA) | DOCSIS2.0 (ATDMA) | DOCSIS2.0 (ATDMA) | | | | | |
Downstream was:
Downstream | Channel Bonding Value |
| Index | 1 | 2 | 3 | 4 | 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 |
| 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 | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked |
| Frequency | 603.00 MHz | 555.00 MHz | 561.00 MHz | 567.00 MHz | 573.00 MHz | 579.00 MHz | 585.00 MHz | 591.00 MHz | 597.00 MHz | 609.00 MHz | 615.00 MHz | 621.00 MHz | 627.00 MHz | 633.00 MHz | 639.00 MHz | 645.00 MHz | 651.00 MHz | 657.00 MHz | 663.00 MHz | 669.00 MHz | 675.00 MHz | 681.00 MHz | 687.00 MHz | 693.00 MHz | | | | | | | | |
| SNR | 40.37 dB | 40.37 dB | 38.98 dB | 40.37 dB | 40.37 dB | 40.37 dB | 40.37 dB | 40.37 dB | 38.98 dB | 38.98 dB | 40.37 dB | 40.37 dB | 38.98 dB | 38.98 dB | 38.98 dB | 38.98 dB | 40.37 dB | 40.37 dB | 38.98 dB | 38.61 dB | 38.98 dB | 38.98 dB | 38.98 dB | 38.61 dB | | | | | | | | |
| Power Level | 1.90 dBmV | 1.50 dBmV | 1.70 dBmV | 1.90 dBmV | 1.70 dBmV | 1.90 dBmV | 2.00 dBmV | 1.80 dBmV | 1.70 dBmV | 1.60 dBmV | 1.60 dBmV | 1.40 dBmV | 1.50 dBmV | 1.70 dBmV | 1.60 dBmV | 1.50 dBmV | 1.60 dBmV | 1.20 dBmV | 1.30 dBmV | 1.40 dBmV | 1.20 dBmV | 1.40 dBmV | 1.10 dBmV | 0.40 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 | | | | | | | | |
I called comcast and the system told me it wouldn't let me speak to someone until I reset the gateway, which it would do via sending a signal. I said yes.
After it came back online, the signal values seem to be missing for index 2-7, and index 8 looks like it's on the hairy edge of being in range. (if Power level < -6, then SNR should be 33 or greater) :
Downstream | Channel Bonding Value |
| Index | 1 | 2 | 3 | 4 | 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 |
| Lock Status | Locked | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Locked | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked | Not Locked |
| Frequency | 555.00 MHz | 459.00 MHz | 465.00 MHz | 471.00 MHz | 477.00 MHz | 483.00 MHz | 489.00 MHz | 495.00 MHz | 501.00 MHz | 507.00 MHz | 513.00 MHz | 519.00 MHz | 525.00 MHz | 531.00 MHz | 537.00 MHz | 543.00 MHz | 549.00 MHz | 561.00 MHz | 567.00 MHz | 573.00 MHz | 579.00 MHz | 585.00 MHz | 591.00 MHz | 597.00 MHz | | | | | | | | |
| SNR | 40.37 dB | ---- | ---- | ---- | ---- | ---- | ---- | 33.38 dB | 38.61 dB | 38.98 dB | 40.37 dB | 40.37 dB | 38.98 dB | 40.37 dB | 40.37 dB | 38.98 dB | 40.37 dB | 38.98 dB | 40.37 dB | 40.95 dB | 40.37 dB | 40.37 dB | 40.95 dB | 38.98 dB | | | | | | | | |
| Power Level | 1.50 dBmV | ---- | ---- | ---- | ---- | ---- | ---- | -8.00 dBmV | -1.30 dBmV | 0.20 dBmV | 0.90 dBmV | 1.10 dBmV | 1.30 dBmV | 1.50 dBmV | 1.60 dBmV | 1.40 dBmV | 1.50 dBmV | 1.70 dBmV | 1.90 dBmV | 1.80 dBmV | 1.90 dBmV | 2.00 dBmV | 1.90 dBmV | 1.80 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 | | | | | | | | |
Called back in and spoke to a rep, and before I could show the weird values above (i.e. missing values from index 2-7), she mentioned how the XB3 is really old and I should get it swapped out for a XB7. I'm more than happy to do so, but my question to folks here is: do the problems I'm describing sound like something that might still exist (i.e. a problem with the wiring from the street to the modem) that won't be solved via the new gateway? Or does it look like it could be a failing gateway?
I haven't reset power on it since the reset that occurred 2 hours ago or so, but looking at the power levels now, they still show "----" from index 2-7 when I refresh the screen, even though some of the other values change slightly.
