Internet outage at the same time.

In case it matters to the modem performance, we have Triple Play but do not own a land line phone so the phone jack and line has never been used/accessed/plugged into anything.

I have the same T25 and experiance a similer outage exery 7 to 11 days. Have had Comcast to house, all levels are fine. See post: https://forums.xfinity.com/t5/Your-Home-Network/Every-11-days-lost-Internet-connection/td-p/3333854

 This is so fustrating COMCAST FIX YOUR PROVISIONING!!

Also see: https://forums.xfinity.com/t5/Your-Home-Network/Internet-Connection-Lost-Arris-T25-Modem-frozen/td-p/3358138#

Joining the fray here, I replied to this post here:  https://forums.xfinity.com/t5/Your-Home-Network/Re-SIP-DNS-Query-Failure-Periodic-loss-of-Internet-Manual/m-p/3374048/highlight/false#M334872

Having a very very similar issue, only mine is every 4/5 days.  This last time connection lasted a day and 1/2 before I needed a manual reboot.  Mine usually fails around 6AM Central time - not sure why mine is Central either?  I'm in the Eastern time zone.

So many calls to tech support, swapped my CM1150V for this T25, and for 5 days it seemed like that was the fix.  Now I'm having to power cycle my devices AGAIN.  

Would be great if a tech who didn't ask "what's the service address"  "could you confirm the last 4 digitrs of the account holder's SSN" would come here and offer some help.

Here's my most recent batch of the exact same errors: 

An update and "thus far":

• Multiple (and by that I mean at least a dozen) chat and phone interactions with customer service personnel.
• 2 tech visits in 2 days.  One tech found nothing wrong.  The other actually tested the signal strength inside and discussed the issue at length with me.
  • Prevailing suggestion: try a different modem.
  • Tech #2 also removed the filter at the back of my modem and installed a new one outside that he said was "the right one".
• Tech #2 was prompted by a second call to customer service which resulted in the promising diagnosis of "you didn't get fiber run to the house when you got new service?".  However it turned out upon tech arrival that fiber isn't in my area so that obviously wasn't the problem.
• Since Tech #2, the problem still occurs with the modem stopping functionality, not every night, but always between 12 midnight and 12:30.  With a restart of the modem being the only thing that brings things back.
• Since Tech #2, while it seems like the problem occurs less, my download speed has been no higher than ~550Mbps -- per Xfinity's speed test and Ookla, tested at 9AM, 1PM, and 12 midnight Eastern -- which is just over 1/2 the advertised speed of the plan.

My next move: obtain another modem and see if this problem persists.  Since Xfinity's modem auto-restarts at 2-4AM, that hardly fixes the problem of an interruption overnight other than automating the restart.  So, that leaves the Netgear CM1150V as the candidate.  Promisingly, it does NOT use an Intel Puma 7 chipset like the T25 which seems to have some indication around the net that it may suffer the issues with Puma 6, if not as glaringly.  We shall see.

Note to those who would like to try this: look for extended holiday return times for products.  That gives you an extra couple months (often into mid-January) to return things if there's no improvement.

I will update with any info.

my internet does that also around 4PM EST I think Xfinity can't handle too many people connecting at the same time, but they will not admit it

Update: Installed the Netgear CM1150V tonight.

Speeds are slightly up (mid-500s to low 700s on Ookala) but about the same or maybe slightly lower on Xfinity's speed test.

Very interestingly, the CM1150V reports the same signal strengths that the Xfinity tech showed me on his hand-held reader (connected to the same cable that goes to my modem) whereas the T25 was always reporting low.  The signals reported are what the Arris techs claim that Comcast needs to be supplying.

Just an update from me.

I had the Arris T25 as well.. Same problem as y'all.. Just about nightly reset at 1am. Had to power cycle my modem every 3-4 days. Error logs were always active, and uncorrectable errors piled up.

Installed the Netgear modem about 4 days ago, and it has been solid. No errors, not even any uncorrectable errors reported. Eveything just stays up as it should.

1 Week update:

Zero down time.

2 Correctables, zero Uncorrectables.

Event log is still empty.

It could be my imagination, but compared to the T25, things are more responsive/smooth.

I am incredibly annoyed at Comcast for having even listed the T25 as an option. Unless they sureptitiously changed something in my service (doubt it), the T25, while techincally "working" on their network, is arguably slower, definitely more error prone, and routinely locks up.  However given that Comcast would undoubtedly prefer me to pay them $15/month, I can't say I'm surprised they didn't bother vetting the T25 properly.

Now what to do with a T25?

8-month-old dead thread now being closed.