ContributionsMost RecentMost LikesSolutionsRe: Critical Signal Errors SB6141 Modem Unfortunately after a week, this error came back. I installed a new modem/router combo and its getting this error: Sat Aug 17 12:32:04 2019 Critical (3) Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC I'm pretty sure there's something wrong with the outside wires at this point, I mean, two modems, one brand new, and the same error. I'll be calling in for support from this point. Re: Critical Signal Errors SB6141 Modem Chris and Allen, thank you for the email support on this issue following my post. The problem was not a 100Mbps router, but instead the wiring outside of the house. Solution: Cleaned and deoxidized coxial connections outside of house (With DeOxit D100L). Re: Critical Signal Errors SB6141 Modem Also had these two errors in the log: 3-Critical R03.0 Ranging Request Retries exhausted 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted Critical Signal Errors SB6141 Modem Signal is dropping intermittently, several times per hour. I cleaned and de-oxidized my coaxial cable at the modem which seemed to reduce the frequency of the failures. Need to know if this is something I can fix or if this is something Cox needs to address? Please Help Downstream Signal Info: Channel ID 11 9 10 12 13 14 15 16 Frequency 843000000 Hz 831000000 Hz 837000000 Hz 849000000 Hz 855000000 Hz 861000000 Hz 867000000 Hz 873000000 Hz Signal to Noise Ratio 37 dB 37 dB 37 dB 37 dB 37 dB 38 dB 38 dB 37 dB Downstream Modulation QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 Power Level The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading 5 dBmV 5 dBmV 5 dBmV 5 dBmV 5 dBmV 5 dBmV 5 dBmV 5 dBmV Downstream Signal Info: Channel ID 3 4 2 1 Frequency 30300000 Hz 36700000 Hz 23900000 Hz 17400000 Hz Ranging Service ID 1477 1477 1477 1477 Symbol Rate 5.120 Msym/sec 5.120 Msym/sec 5.120 Msym/sec 5.120 Msym/sec Power Level 42 dBmV 43 dBmV 41 dBmV 39 dBmV Upstream Modulation [3] 16QAM [3] 64QAM [3] 16QAM [3] 64QAM [3] 16QAM [3] 64QAM [3] 16QAM [3] 64QAM Ranging Status Success Success Success Success Modem Info: Model Name: SB6141 Vendor Name: ARRIS Group, Inc. Firmware Name: SB_KOMODO-1.0.7.0-SCM00-NOSH Boot Version: PSPU-Boot(25CLK) 1.0.12.18m3 Hardware Version: 7.0 Errors: 3-Critical R07.0 Unicast Ranging Received Abort Response - initializing MAC 3-Critical R02.0 No Ranging Response received - T3 time-out 3-Critical R07.0 Unicast Ranging Received Abort Response - initializing MAC