Had a scheduled appointment on 10/6/2018 but no one ever showed up. This fixed the issue for a good couple of months. I have researched the forums and see this is not uncommon. Hi There - my internet is very intermittent over the last few days. 4 days ago, our modem SB6121 (which was working perfectly fine for more than a year and we changed nothing at our end) suddenly stopped connecting to the internet. Certain time of day, this occurs on my modem. Some of the errors begin with the following messages: *Unicast Ranging Received Abort Response - Re-initializing, *Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out, *No Ranging Response received - T3 time-out, *SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing, Also, this is the info on the "Cable Connection" tab: http://imgur.com/a/U0aVk. Public Statistics. We can help with: technical issues, general service questions, upgrades & downgrades, new accounts & transfers, disconnect requests, credit requests and more. ... Unicast Ranging Received Abort Response Connectivity. Press J to jump to the feed. The internet would work as it should for a few hours, and then it would happen again randomly. Why is this happening and how do I fix this? Logs are filled with T3 timeouts and none of the people that I talk to seemed to understand that there is an issue. Might help narrow down the cause. I went out and bought a new Linksys one the next day. Or post them here so someone can look at them. Please does anybody have a solution. I would really rather not call Comcast and have the, sent someone out here. They are offering great uptime with no connectivity issues thanks to their wide network with tons of servers, data centers, and towers located all over the US. I've had to disconnect the coax about 5 times in the past two days. Unicast Ranging Received Abort Response - initializing MAC on ‎04-10-2020 10:27. It's been a good 4 or 5 months with no issues with the internet, at all. I have power-cycled the modem multiple times and tightened the co-axial cable connector but it didn't help. That is, until recently. Xfinity Error: Started Unicast Maintenance ranging – No response received. Date Registered ‎03-18-2019 02:46 PM: Date Last Visited ‎09-30-2019 01:48 PM: I hope that's not the case here. This indicates that today Xfinity can solve most of the customer’s issues better than before … Click this link to send me a modmail message verifying your full name, address, and the phone number associated with your services and we can go from there. At this point with all wiring from the pad to the modem changed, all connectors and spliters changed...Comcast has to admit a problem on the other side of the pad, no?Our mayor sent an email and Senator Linda R. Greenstein's aide Scott has contacted us twice to let us know she … 20000700 Unicast Ranging Received Abort Response - Re-initializing MAC 20000500 Started Unicast Maintenance Ranging - No Response received - T3 time-out Sun Sep 15 18:13:05 2013 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC Sun Sep 15 18:12:43 2013 Critical (3) No Ranging Response received - … The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. I'd check your signal levels. Wed Apr 29 12:47:01 2020 : Critical (3) Received Response to Broadcast … Hi, My internet cuts out periodically and it is very irritating. Looks like you're using new Reddit on an old browser. Firmware version: https://imgur.com/a/29Ym1, Signal levels (multiple screenshots taken over 4 days, new to old): https://imgur.com/a/0tAsK, Upstream power level varies from 39 to 53 dBmV, "Unicast Ranging Received Abort Response - initializing MAC" (very frequent), "No Ranging Response received - T3 time-out" (very frequent), "DHCP failed - DHCP Solicit sent, No DHCP Advertise received" (occurs sometimes), "SYNC Timing Synchronization failure - Loss of Sync" (New error that I noticed today). ... Unicast Ranging Received Abort Response. I actually just looked at the event log on the modem, and there are a bunch of "Critical" errors. I have a CM500-100NAS modem and an Orbi router with satellite. Comcast Business. Performed a search and similar topics were marked resolved, so I'm starting a new one. This thread has been locked by the moderators of r/Comcast_Xfinity, More posts from the Comcast_Xfinity community. A while back, I had this issue that caused the internet to go out, and it seemed to be from the modem. All forum topics; Previous Topic; Next Topic; 1 REPLY 1. Unicast Ranging Received Abort Response - initializing MAC . This became a huge issue since our household is pretty dependent on the internet (For school work, VoIP, and streaming of various movies/music). XFINITY; SMALL BUSINESS; ENTERPRISE; Comcast Business. Comcast recommended that I purchase a new modem, which I did (CM500). ... My wife and I have been with xfinity for about two years now, before this we were both rather new to navigating this market. Restarting the router didn't do anything, and neither did restarting the modem. Should you experience further issues, please create a new post. 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