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Multiple Connectivity Issues - T3 timeouts daily

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Multiple Connectivity Issues - T3 timeouts daily

I keep loosing connectivity daily with one of my upstream channels freaking out and loosing its handshake with the CMTS. I spoke with chat support and all they did was say everything looked ok and tried to sell me extra services that I had to say no to 5 times. Can someone help please. Channel 5 usually goes up to 49.5 dBmV and thats when I loose connectivity.

 

TimePriorityDescription
Wed Aug 12 07:02:18 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 07:01:32 2020Notice (6)CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: �; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 07:01:27 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 07:01:27 2020Notice (6)CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: �; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 07:01:26 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 07:01:22 2020Notice (6)CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: �; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 07:01:21 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 07:01:19 2020Warning (5)Unicast DSID PSN startup error
Wed Aug 12 07:01:18 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 07:00:39 2020Warning (5)Dynamic Range Window violation
Wed Aug 12 07:00:39 2020Warning (5)RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 07:00:28 2020Notice (6)TLV-11 - unrecognized OID;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:58:00 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:53:15 2020Warning (5)Dynamic Range Window violation
Wed Aug 12 06:53:15 2020Warning (5)RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:53:04 2020Notice (6)TLV-11 - unrecognized OID;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:48:02 2020Notice (6)CM-STATUS message sent. Event Type Code: 3; Chan ID: N/A; DSID: ; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:48:00 2020Warning (5)Unicast DSID PSN startup error
Wed Aug 12 06:47:44 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:47:04 2020Warning (5)Dynamic Range Window violation
Wed Aug 12 06:47:04 2020Warning (5)RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:46:54 2020Notice (6)TLV-11 - unrecognized OID;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Time Not EstablishedNotice (6)Honoring MDD; IP provisioning mode = IPv6
Time Not EstablishedCritical (3)SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:30 2020Critical (3)16 consecutive T3 timeouts while trying to range on upstream channel 0;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:30 2020Critical (3)Ranging Request Retries exhausted;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:30 2020Critical (3)No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:24 2020Notice (6)CM-STATUS message sent. Event Type Code: 7; Chan ID: 1 2; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:18 2020Critical (3)No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:14 2020Notice (6)CM-STATUS message sent. Event Type Code: 7; Chan ID: 1 2; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:13 2020Critical (3)No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:08 2020Critical (3)16 consecutive T3 timeouts while trying to range on upstream channel 1;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:08 2020Critical (3)Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:08 2020Critical (3)Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:06 2020Critical (3)No Ranging Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;
Wed Aug 12 06:39:04 2020Critical (3)

Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=08:36:c9:3d:2c:e0;CMTS-MAC=0c:11:67:02:34:ee;CM-QOS=1.1;CM-VER=3.1;

 

 

Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel669000000 HzLocked
Connectivity StateOKOperational
Boot StateOKOperational
SecurityEnabledBPI+
IP Provisioning ModeHonor MDDhonorMdd(4)
 
Downstream Bonded Channels
ChannelLock StatusModulationChannel IDFrequencyPowerSNRCorrectablesUncorrectables
1LockedQAM25637669000000 Hz7.2 dBmV40.8 dB00
2LockedQAM2569501000000 Hz6 dBmV40.6 dB00
3LockedQAM25610507000000 Hz6.1 dBmV40.6 dB00
4LockedQAM25611513000000 Hz6.3 dBmV40.6 dB00
5LockedQAM25612519000000 Hz6.3 dBmV40.6 dB00
6LockedQAM25613525000000 Hz6.5 dBmV40.7 dB00
7LockedQAM25614531000000 Hz6.4 dBmV40.7 dB00
8LockedQAM25615537000000 Hz6.3 dBmV40.6 dB00
9LockedQAM25616543000000 Hz6.3 dBmV40.6 dB00
10LockedQAM25617549000000 Hz6.2 dBmV40.6 dB00
11LockedQAM25618555000000 Hz6.3 dBmV40.6 dB00
12LockedQAM25619561000000 Hz6.6 dBmV40.7 dB00
13LockedQAM25620567000000 Hz6.7 dBmV40.7 dB00
14LockedQAM25621573000000 Hz6.9 dBmV40.7 dB00
15LockedQAM25622579000000 Hz6.9 dBmV40.7 dB00
16LockedQAM25623585000000 Hz6.9 dBmV40.7 dB00
17LockedQAM25624591000000 Hz6.8 dBmV40.6 dB00
18LockedQAM25625597000000 Hz6.9 dBmV40.7 dB00
19LockedQAM25626603000000 Hz6.9 dBmV40.7 dB00
20LockedQAM25627609000000 Hz6.8 dBmV40.7 dB00
21LockedQAM25628615000000 Hz6.8 dBmV40.6 dB00
22LockedQAM25629621000000 Hz6.9 dBmV40.7 dB00
23LockedQAM25630627000000 Hz7.1 dBmV40.8 dB00
24LockedQAM25631633000000 Hz7.2 dBmV40.8 dB00
25LockedQAM25632639000000 Hz7.2 dBmV40.8 dB00
26LockedQAM25633645000000 Hz7.2 dBmV40.7 dB00
27LockedQAM25634651000000 Hz7.3 dBmV40.8 dB00
28LockedQAM25635657000000 Hz7.2 dBmV40.8 dB00
29LockedQAM25636663000000 Hz7.3 dBmV40.8 dB00
30LockedQAM25638675000000 Hz7.2 dBmV40.5 dB00
31LockedQAM25639681000000 Hz7.2 dBmV40.9 dB00
32LockedQAM25640687000000 Hz7.3 dBmV40.8 dB00
 
Upstream Bonded Channels
ChannelLock StatusUS Channel TypeChannel IDSymbol RateFrequencyPower
1LockedATDMA15120 Ksym/sec16400000 Hz44.5 dBmV
2LockedATDMA25120 Ksym/sec22800000 Hz44.5 dBmV
3LockedATDMA35120 Ksym/sec29200000 Hz44.5 dBmV
4LockedATDMA45120 Ksym/sec35600000 Hz44 dBmV
5LockedATDMA51280 Ksym/sec40400000 Hz44.5 dBmV
6Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
7Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
8Not LockedUnknown00 Ksym/sec0 Hz0.0 dBmV
 
Downstream OFDM Channels
ChannelLock
Status
Modulation /
Profile ID
Channel
ID
FrequencyPowerSNR /
MER
Active Subcarrier
Number Range
Unerrored
Codewords
Correctable
Codewords
Uncorrectable
Codewords
1Locked0159722000000 Hz7.9 dBmV40.9 dB1246 ~ 28491741120510
2Not Locked000 Hz0 dBmV0.0 dB0 ~ 4095000
 
Upstream OFDMA Channels
ChannelLock StatusModulation / Profile IDChannel IDFrequencyPower
1Not Locked000 Hz0 dBmV
2Not Locked000 Hz0 dBmV
 
Extended Upstream Transmit Power
Enable Extended Upstream Transmit Power
 
Current System Time:Wed Aug 12 07:09:27 2020
System Up Time:00:09:43

 

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Expert

Re: Multiple Connectivity Issues - T3 timeouts daily

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

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 check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.



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