Loads of upload related … Connections look great and tight. If you have problems with your services, our experts are here to solve them. Same symptoms on Teams. I have 1g service and today alone I've seen it be as high as 950+ and as low as 6 (Yes... 6). I am a bot, and this action was performed automatically. Same thing happened to me, thought I was going crazy. Level 1 phone support cycles the modem, says they don't see anything. Watching speeds, they have been completely erratic. Be sure the ISP provisions the modem correctly.Be sure there are no coax cable line splitters in the between the modem and ISP service box. Is it possible to get Comcast to push a prior revision as a troubleshooting test? 16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=dc:ef:09:8c:96:b8;CMTS-MAC=00:01:5c:73:b8:5b;CM-QOS=1.1;CM-VER=3.0; 2016-02-16, 19:58:33: Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=dc:ef:09:8c:96:b8;CMTS-MAC=00:01:5c:73:b8:5b;CM-QOS=1.1;CM-VER=3.0; 2016-02-16, 12:07:18 In game MS appears to be fine most of the time but you can definitely tell something is lagging. Press question mark to learn the rest of the keyboard shortcuts. Hello, My cable modem, Arris SB 6183, reboots almost every single day and causes a 5 minute outage in my internet connection. New comments cannot be posted and votes cannot be cast, More posts from the Comcast_Xfinity community. No other connections. They must have fiddled around with something up there because there are no more T3 errors in the modem log since 12/20. Problem persists. Cookies help us deliver our Services. If you have questions about your services, we're here to answer them. Cable modems should be using RG6 not RG59. I've had this modem and router setup going for a while now. Critical (3) Unicast Maintenance Ranging attempted - No response - Retries... Tue Nov 20 23:40:52 2018 . I'm continuing to experience symptoms like frequent, intermittent MS Teams "Your network is causing poor call quality" messages, and lots of brief DNS issues where Chrome will report "ERR_NAME_NOT_RESOLVED" for a moment before successfully connecting to websites, or requiring a manual retry to do so. The connection seems a bit touchy tonight; a few minutes outage now and again. 21:20:38 16 consecutive T3 timeouts while trying to range on - 4120861 Help please! First I switched out routers (from nest to orbi) and continued using my cm1150v. Other times it's fine for 2-3 days without incident. This post was marked as a discussion by a moderator. I'm at a crossroads where to go from here. Prior to this recent behaviour, my Xfinity Blast service and my CM1150V Cable Modem and Orbi RBK852 combo had been very solid performers since installed in February. I then saw that there were a lot of t3 and some t4 errors. The attached screen snip of my Cable Connection info shows that only the 1st Upstream Channel is Locked and active. The only thing that seems to bring any temp relief is a modem reboot. Our community is your official source on Reddit for help with Xfinity services. Steaming services with horible quality. here are the logs I'm seeing on a regular basis from my cable modem. Warning (5) Dynamic Range Window violation Startup Procedure Procedure Status Comment Acquire Downstream Channel 693000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Security Enabled BPI+ IP Provisioning Mode Honor MDD honorMdd(4) Re: No Ranging Response received - T3 time-out : Firmware issue? Critical (3) Started Unicast Maintenance Ranging - No Response received - ... Tue Nov 20 18:03:57 2018 . Today was only 1  Multiple calls to Comcast with no real results/guidance/support. In the Upstream Bonded Channels section, identify the number of Channels and Type to find verify Upstream Power levels are within the acceptable range for each upstream channel. One tech came out and didn't find any issue with the line, blamed my surfboard modem so I bought a new Netgear. Every 6-7 minutes the xfinity-supplied router log shows: Wed Dec 21 19:41:25 2016 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:41:25 2016 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:41:25 2016 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:41:25 2016 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:41:25 2016 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:41:25 2016 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:41:19 2016 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:41:19 2016 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:41:19 2016 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:34:13 2016 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 2;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:34:13 2016 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:34:13 2016 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:34:12 2016 Critical (3) 16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; Wed Dec 21 19:34:12 2016 Critical (3) Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=58:23:8c:b4:46:d2;CMTS-MAC=00:01:5c:6b:80:57;CM-QOS=1.1;CM-VER=3.0; If I power cycle the router, it won't reconnect for a couple hours. Event Type Code: 7; Chan ID: 2 3 4; CM-STATUS message sent. Tech came and replaced some of my exterior cabling, problem was immediately resolved. Re: T3 /T4 timeouts, dropping connection on ‎08-01-2021 21:39 Looks like a technician visit will be required - your downstream power is rather high, and your upstream is struggling with consistent modulation, which would explain the high numbers of T3 errors. By using our Services or clicking I agree, you agree to our use of cookies. Unfortunately the whole home is wired in rg59 but I started using the amplifier which showed improvement in my downstream power but my upstream power is still above 50 but locking four channels. I have connected my Netgear CM1000 directly at the point of entry. Tech came out for me again and figured out where our pole was. Glad that worked. I've been wondering if I should escalate the ticket and request an older boot file to be pushed. 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