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Ongoing Internet Outage (T3 Timeouts)
Hello,
I've been experiencing T3 timeouts on my modem/internet for about the past year or so. About 8 months ago I replaced the modem and router but the issue persisted. Then a few months ago I scheduled a technician visit. The technician stated nothing was wrong. A week ago I replaced the coax cable from the wall to my modem which seemed to fix the issue for a few days but the T3 timeouts are now reoccurring. I'm using an Arris Surfboard S33 modem and ASUS RT-AX58U AX3000 router.
For what it's worth, we've had Xfinity internet service for years now with no issues. Until about a year ago these T3 timeouts started occurring very frequently everyday. Some days worse than others.
From my modem's event log.
Please let me know if there is any other info I can provide to help.
| 5/2/2022 04:30:16 |
3 | Successful LAN WebGUI login from x.x.x.x on 22/02/05 at 4:30 AM. |
| 1/1/1970 00:00:18 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:22 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 5/2/2022 04:52:03 |
3 | Successful LAN WebGUI login from x.x.x.x on 22/02/05 at 4:52 AM. |
| 1/1/1970 00:00:17 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:22 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 5/2/2022 05:03:01 |
3 | Successful LAN WebGUI login from x.x.x.x on 22/02/05 at 5:03 AM. |
| 1/1/1970 00:00:19 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:22 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:19 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:23 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:19 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:24 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:19 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:22 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:18 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:25 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:19 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 5/2/2022 13:32:53 |
3 | Successful LAN WebGUI login from x.x.x.x on 22/02/05 at 1:32 PM. |
| 1/1/1970 00:00:19 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:23 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 5/2/2022 14:15:29 |
3 | Successful LAN WebGUI login from x.x.x.x on 22/02/05 at 2:15 PM. |
| 1/1/1970 00:00:23 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:29 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 5/2/2022 14:51:59 |
3 | Successful LAN WebGUI login from x.x.x.x on 22/02/05 at 2:51 PM. |
| 5/2/2022 15:09:56 |
3 | Successful LAN WebGUI login from x.x.x.x on 22/02/05 at 3:09 PM. |
| 1/1/1970 00:00:18 |
3 | SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:23 |
3 | No Ranging Response received - T3 time-out;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 1/1/1970 00:00:30 |
6 | Honoring MDD; IP provisioning mode = IPv6 |
| 5/2/2022 15:50:44 |
6 | DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 5/2/2022 15:50:58 |
6 | CM-STATUS message sent. Event Type Code: 5; Chan ID: 48; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=x:x:x:x:x:x;CMTS-MAC=x:x:x:x:x:x;CM-QOS=1.1;CM-VER=3.1; |
| 5/2/2022 15:52:47 |
3 | Successful LAN WebGUI login from x.x.x.x on 22/02/05 at 3:52 PM. |
CCElizabeth
Problem Solver
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908 Messages
3 years ago
Hello @user_2aabd2! Thank you for taking some time to create this post and bring your issue to our Xfinity Community Forum! I am sorry to hear about the ongoing service trouble. You are in the right place for help. Thank you for providing your signa levels and the steps you've taken to try and resolve this so far.
Please send me a private message with your first and last name, as well as complete service address to "Xfinity Support". To do so, click on the chat icon located at the top right of this forums page.
I look forward to working with you soon!
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EG
Expert
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110.2K Messages
3 years ago
@user_2aabd2 @XfinityElizabethA
Please circle back here and post any possible solutions for the issue here in the open forums so that all readers here may benefit from the exchange / info. This is in keeping with the spirit for which these public help forums were originally intended. Thank you.
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