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user_ng3cd5
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2 Messages

Monday, March 10th, 2025 8:30 PM

T3 Timeouts Frequent

We've had a rock solid modem connection with Xfinity since taking their service 3 years ago. I use a user-owned Netgear CM700 which has operated problem free. Lately, we've been getting transient T3 Timeouts, sometimes 2–3 times per day, sometimes none. A copy of our log since February 08, 2025 is attached to this message. We need some help in finding out if it's our issue (splitter, connectivity, modem, etc.) or an Xfinity issue downstream. Please assist.

Modem Log:

Feb 08 2025 06:34:16 Critical (3) No Ranging Response received - T3 time-out
Feb 08 2025 06:34:16 Critical (3) No Ranging Response received - T3 time-out
Feb 08 2025 06:35:37 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Feb 08 2025 07:49:33 Critical (3) No Ranging Response received - T3 time-out
Feb 18 2025 06:47:33 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Feb 18 2025 07:54:45 Critical (3) No Ranging Response received - T3 time-out
Feb 19 2025 11:42:58 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Feb 19 2025 12:24:25 Critical (3) No Ranging Response received - T3 time-out
Feb 19 2025 14:45:41 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Feb 19 2025 15:22:13 Critical (3) No Ranging Response received - T3 time-out
Feb 22 2025 09:27:24 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Feb 22 2025 11:46:20 Critical (3) No Ranging Response received - T3 time-out
Feb 27 2025 02:02:39 Warning (5) Lost MDD Timeout
Feb 27 2025 02:25:17 Critical (3) No Ranging Response received - T3 time-out
Mar 06 2025 08:59:11 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 06 2025 09:06:44 Critical (3) No Ranging Response received - T3 time-out
Mar 06 2025 22:12:28 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 06 2025 23:01:38 Critical (3) No Ranging Response received - T3 time-out
Mar 07 2025 11:43:25 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 07 2025 11:45:08 Critical (3) No Ranging Response received - T3 time-out
Mar 07 2025 21:12:36 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 07 2025 21:29:17 Critical (3) No Ranging Response received - T3 time-out
Mar 07 2025 23:01:38 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 08 2025 00:19:48 Critical (3) No Ranging Response received - T3 time-out
Mar 08 2025 10:44:39 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 08 2025 11:48:09 Critical (3) No Ranging Response received - T3 time-out
Mar 08 2025 13:55:00 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 08 2025 15:41:16 Critical (3) No Ranging Response received - T3 time-out
Mar 08 2025 15:55:42 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 08 2025 16:09:37 Critical (3) No Ranging Response received - T3 time-out
Mar 08 2025 20:12:46 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 08 2025 20:18:56 Critical (3) No Ranging Response received - T3 time-out
Mar 09 2025 22:35:40 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 09 2025 23:58:10 Critical (3) No Ranging Response received - T3 time-out
Mar 10 2025 00:27:48 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 10 2025 00:30:41 Critical (3) No Ranging Response received - T3 time-out
Mar 10 2025 10:54:58 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 10 2025 10:55:04 Critical (3) No Ranging Response received - T3 time-out
Mar 10 2025 10:57:37 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1
Mar 10 2025 11:04:57 Critical (3) No Ranging Response received - T3 time-out
Mar 10 2025 14:09:41 Warning (5) MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1

Question

 • 

Updated 

1 month ago

25

3

0

EG

Expert

 • 

109.7K Messages

1 month ago

Are you actually having connection drops, or are you just focusing on the error log entries ?

2

0

user_ng3cd5

2 Messages

I am having connection drops. I'm wondering if it has to do with the MoCa adapters I've added to my home network? I wanted a mixed network, MoCa and WiFi so our PCs could be on Ethernet to provide a more solid signal than WiFi provided. Could the adapters be causing the T3 errors?

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1 month ago

0

XfinityJorge

Official Employee

 • 

2.1K Messages

 

user_ng3cd5 Thank you so much for using our Forums to contact our Xfinity Support Team. We are here happy to work together to make sure your service is working as it should and to help with the connection drops. To get started can you share your name and address with us over DM so we can jump right into this.
Here's the detailed steps to direct message us: 
• Click "Sign In" if necessary 
• Click the "Direct Message" icon (upper right corner of this page) 
• Click the "New message" (pencil and paper) icon 
• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list 
• Type your message in the text area near the bottom of the window 
• Press Enter to send your message
 

 

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We ask that you post publicly so people with similar questions may benefit from the conversation.
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1 month ago

0

EG

Expert

 • 

109.7K Messages

1 month ago

For a test, does a PC connected directly to the CM 700 cable modem (no routers or MoCA adapters in the mix) with an ethernet cable have connection drops ?

0

0

EG

Expert

 • 

109.7K Messages

1 month ago

@user_ng3cd5 

Have you had a chance to try that test ?

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