Columbus, OH -- standard internet 15mbps -- apartment complex -- Last week I was unable to connect internet. Since I had an old docsis 2 motorola modem, TWC replaced it with technicolor TC4310. Replacing the modem didn't resolve the issue, therefore a technician came and worked on apartment's cable box and checked my line. Now I can access internet but even speed test results are fine, connection seems not stable as before (slower page loading and much more freezing with video calls and watching live streams).
Modem connection status page shows 12 of 16 downstream channels are locked and I am wondering if this is normal (please see below for modem status logs). Should all 16 downstream channels be locked? I did some research on internet but still I am not sure if signal levels are fine.
|Standard Specification Compliant||DOCSIS 3.0|
|Acquire Downstream Channel||Locked|
|Channel||Lock Status||Modulation||Channel ID||Symbol Rate||Frequency||Power||SNR|
|1||Locked||QAM256||2||5360537||621000000 Hz||-1.0 dBmV||40.2 dB|
|2||Locked||QAM256||1||5360537||615000000 Hz||-0.8 dBmV||39.4 dB|
|3||Locked||QAM256||3||5360537||627000000 Hz||-1.2 dBmV||40.2 dB|
|4||Locked||QAM256||4||5360537||633000000 Hz||-1.2 dBmV||40.2 dB|
|5||Locked||QAM256||5||5360537||639000000 Hz||-1.6 dBmV||40.1 dB|
|6||Locked||QAM256||6||5360537||645000000 Hz||-1.3 dBmV||40.2 dB|
|7||Locked||QAM256||7||5360537||651000000 Hz||-1.6 dBmV||40.0 dB|
|8||Locked||QAM256||8||5360537||657000000 Hz||-2.7 dBmV||39.9 dB|
|9||Locked||QAM256||9||5360537||663000000 Hz||-2.7 dBmV||39.7 dB|
|10||Locked||QAM256||10||5360537||669000000 Hz||-3.0 dBmV||39.7 dB|
|11||Locked||QAM256||11||5360537||675000000 Hz||-3.8 dBmV||35.8 dB|
|12||Locked||QAM256||12||5360537||681000000 Hz||-3.5 dBmV||38.0 dB|
|13||Not Locked||Unknown||0||Unknown||0.0 dBmV||0.0 dB|
|14||Not Locked||Unknown||0||Unknown||0.0 dBmV||0.0 dB|
|15||Not Locked||Unknown||0||Unknown||0.0 dBmV||0.0 dB|
|16||Not Locked||Unknown||0||Unknown||0.0 dBmV||0.0 dB|
|Channel||Lock Status||Modulation||Channel ID||Symbol Rate||Frequency||Power|
|1||Locked||QAM16||91||5120 Ksym/sec||30600000 Hz||28.8 dBmV|
|2||Locked||QAM16||89||2560 Ksym/sec||19400000 Hz||28.0 dBmV|
|3||Locked||QAM16||90||5120 Ksym/sec||24200000 Hz||28.5 dBmV|
|4||Locked||QAM16||92||2560 Ksym/sec||37000000 Hz||28.3 dBmV|
|Mon Sep 05 00:57:30 2016||Critical (3)||Started Unicast Maintenance Ranging - No Response received - ...|
|Time Not Established||Error (4)||Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=70:5a:...|
|Time Not Established||Error (4)||Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=70:5a:...|
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just because you have an 8,16,24 or 32 ch modem doesn't mean there's that many QAM modem channels on the system.
Ohio had 4 then went to 8 and presently 12. In many areas, However the loading is light and 12 channels is plenty. I do see there are 7 more channels, 4 of which are sitting idle and ready to be activated, however the 7 are all in the 4G LTE band and ingress is a major issue as Ohio's infrastructure is 30+ years old (40 here) and needs to be replaced.
Your upstream levels are a little off(a bout 10 dB lower than optimal) but that may be new amplifiers out on the street, nothing to worry about. Eventually the bucket truck crew will get around to ballancing the levels better. It's not affecting the channels downstream.
Our old 40 year old crap up here runs upstream in the +45 to +50 dBmv range and there's no room to add more than a 2 way splitter and keep the upstream in range and levelled...
(supposedly done to reduce upstream noise) but the amps are so old that they don't have active reverse, return, or upstream amps.