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CrispyK

@comcast.net

[Signals] T3 and T4 Timeouts

Hello all,

Out of nowhere, my comcast SMCD3GNV modem with firmware 3.0.4.0.6_T2 started to generate these errors. My download went from 15 Mbps to ~.5-1.5 Mbps with many timeouts and drops. I did not change anything on my end at all so I am wondering what could cause this. I know that my signals are off kilter so I will post those as well. I do not have the time tonight to research what to do other than "call comcast". Let me know what I might be able to do on my end.

Lost MDD Timeout;CM-MAC=b8:9b:c9:b1:0b:80;CMTS-MAC=00:01:5c:22:bd:42;CM-QOS=1.1;CM-VER=3.0; 2012/08/29 23:05:23 warning

No Ranging Response received - T3 time-out;CM-MAC=b8:9b:c9:b1:0b:80;CMTS-MAC=00:01:5c:22:bd:42;CM-QOS=1.1;CM-VER=3.0; 2012/08/29 23:05:05 critical

Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b8:9b:c9:b1:0b:80;CMTS-MAC=00:01:5c:22:bd:42;CM-QOS=1.1;CM-VER=3.0; 2012/08/29 23:05:01 critical

Downstream
Frequency 656.998 MHz
SNR 26.656 dB
Power -20.369 dBmV
Modulation 256 QAM

Upstream
Frequency 36.400 MHz 29.500 MHz 24.200 MHz
Symbol Rate 5120 KSym/sec 5120 KSym/sec 2560 KSym/sec
Power Level 51.0000 dBmV 48.2500 dBmV 49.2500 dBmV
Modulation 64QAM 64QAM 16QAM



EG
The wings of love
Premium
join:2006-11-18
Union, NJ
kudos:9

The downstream signal stats are horrible and the upstream power is borderline to being out of spec. Are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured ?

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two way splitter connected directly off of the drop from the street/pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then putting them back together again, then perhaps it's best to book a tech visit to investigate and correct.