Participant

Upstream light blinking on Technicolor TC4310

Anyone know what a slow-blinking upstream light means on a TC4310? Mine always seems to be blinking for the last few days. I am getting my contracted speed, so no cause to complain. I am just curious.

 

Also is there a username/password for this modem? I assume there's an event log that would answer the question, but I have not been able to find a login for it.

 

Mike

33 REPLIES 33
Expert

Re: Upstream light blinking on Technicolor TC4310

copy and paste your modems signal level and error log pages, do not reset the modem first.

 what color are the LED's?

 

Participant

Re: Upstream light blinking on Technicolor TC4310

How does one obtain that information on a leased TC4310? I go to 192.168.100.1 and get a login and password page. Google is not forthcoming with the password.

Participant

Re: Upstream light blinking on Technicolor TC4310

Never mind last post. For anyone who needs it, the login for a TC4310 is user [blank] password admin

As far as I can tell that is not online, I just found it.

 

LEDs are all green.

 

Startup Procedure
ProcedureStatusComment
Acquire Downstream Channel Locked
Connectivity StateOKOperational
Boot StateOKOperational
Configuration FileOK 
SecurityEnabledBPI+

 

Downstream Channel
ChannelLock StatusModulationChannel IDSymbol RateFrequencyPowerSNR
1LockedQAM25615360537705000000 Hz9.4 dBmV42.1 dB
2LockedQAM256165360537615000000 Hz10.2 dBmV43.0 dB
3LockedQAM256155360537621000000 Hz10.2 dBmV43.0 dB
4LockedQAM256145360537627000000 Hz10.1 dBmV42.9 dB
5LockedQAM256135360537633000000 Hz10.3 dBmV43.0 dB
6LockedQAM256125360537639000000 Hz10.2 dBmV42.7 dB
7LockedQAM256115360537645000000 Hz10.1 dBmV42.9 dB
8LockedQAM256105360537651000000 Hz9.8 dBmV42.6 dB
9LockedQAM25695360537657000000 Hz9.7 dBmV42.5 dB
10LockedQAM25685360537663000000 Hz9.5 dBmV42.4 dB
11LockedQAM25675360537669000000 Hz9.3 dBmV42.1 dB
12LockedQAM25665360537675000000 Hz9.6 dBmV41.3 dB
13LockedQAM25655360537681000000 Hz9.7 dBmV42.3 dB
14LockedQAM25645360537687000000 Hz9.6 dBmV42.2 dB
15LockedQAM25635360537693000000 Hz9.3 dBmV42.0 dB
16LockedQAM25625360537699000000 Hz9.2 dBmV42.0 dB

 

Upstream Channel (Partial Service)
ChannelLock StatusModulationChannel IDSymbol RateFrequencyPower
1LockedQAM64435120 Ksym/sec30600000 Hz51.0 dBmV
2LockedQAM16412560 Ksym/sec18500000 Hz51.5 dBmV
3LockedQAM64425120 Ksym/sec23300000 Hz51.0 dBmV
4LockedQAM16442560 Ksym/sec37000000 Hz52.2 dBmV

 

 

Although you cannot tell from this copy/paste, the 2 and 3 channels are grayed out. So it looks like the modem is only using two of its four channels.

 

The cable installer placed a 3db attenuator in line with the modem. Just reading some of the signal level advice on the forum, the downstream looks pretty high (which is probably why the attenuator was put on?) but the modem is having difficulty making itself heard on the upstream. Is that correct? So if I pull the attenuator off, it would have an easier time transmitting but a harder time receiving?

 

Event log:

Time  Priority  Description 
 Wed Mar 30 20:12:16 2016   Critical (3)  Received Response to Broadcast Maintenance Request, But no Un... 
 Wed Mar 30 18:42:59 2016   Error (4)  Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=e0:88:... 
 Wed Mar 30 18:42:59 2016   Error (4)  Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=e0:88:... 
 Thu Mar 31 02:42:45 2016   Notice (6)  Overriding MDD IP initialization parameters; IP provisioning ... 
 Thu Mar 31 02:42:42 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Thu Mar 31 02:42:35 2016   Error (4)  Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=e0:88:... 
 Thu Mar 31 02:42:35 2016   Error (4)  Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=e0:88:... 
 Time Not Established  Warning (5)  DHCP WARNING - Non-critical field invalid in response ;CM-MAC... 
 Time Not Established  Notice (6)  Honoring MDD; IP provisioning mode = IPv4 
 Tue Mar 29 18:25:30 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Tue Mar 29 07:11:05 2016   Critical (3)  16 consecutive T3 timeouts while trying to range on upstream ... 
 Tue Mar 29 07:11:05 2016   Critical (3)  Unicast Maintenance Ranging attempted - No response - Retries... 
 Tue Mar 29 07:11:05 2016   Critical (3)  Started Unicast Maintenance Ranging - No Response received - ... 
 Mon Mar 28 07:26:41 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Mon Mar 28 05:23:13 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Sun Mar 27 18:48:09 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Sun Mar 27 18:38:57 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Sun Mar 27 10:31:40 2016   Critical (3)  Received Response to Broadcast Maintenance Request, But no Un... 
 Sun Mar 27 18:29:55 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Sun Mar 27 03:52:34 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Sun Mar 27 03:28:14 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Time Not Established  Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Sat Mar 26 21:31:24 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Sat Mar 26 21:28:59 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Time Not Established  Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Sat Mar 26 13:28:16 2016   Critical (3)  Resetting the cable modem due to docsDevResetNow 
 Sat Mar 26 21:18:07 2016   Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Time Not Established  Critical (3)  No Ranging Response received - T3 time-out;CM-MAC=e0:88:5d:c1... 
 Time Not Established  Critical (3)  SYNC Timing Synchronization failure - Failed to acquire FEC f... 
 Time Not Established  Critical (3)  SYNC Timing Synchronization failure - Failed to acquire QAM/Q... 
 Time Not Established  Critical (3)  Resetting the cable modem due to docsDevResetNow 
Expert

Re: Upstream light blinking on Technicolor TC4310

Installer tech was WRONG!

This needs to go to a competent tech and then upgraded to the bucket truck guys.. You have way too much downstream signal and the upstream with the attenuator is at max, 2 channels are not bonding , the US is flashing and you're getting loads of errors

 Describe exatly what's between the outside grounding block and the modem?

Is there an amplifier or splitter somewhere?

 Is this a new instal?

 Is this an apartment building?

 Do you have TWC cable TV?

 

 

Participant

Re: Upstream light blinking on Technicolor TC4310

Amplifier or splitter, no.

New install, yes, February.

Apartment, yes.

TV, no.

 

Installer showed up, I pointed out where I wanted to put the modem. Tech traced the outlet to the box downstairs, which is a rats' nest of wires (and possibly actual rats, from the look of it.) He connected up one cable downstairs. I think he put on some type of filter; I assume that's to prevent me watching TV? Then came back, replaced the connector behind the wall plate, attached the modem and immediately got a signal. He called in, said the signal levels were too high, and put on a 3db attenuator right next to the modem. End of install.

 

At the time the lights were steady. I had a customer-owned modem for a while (another fun story over in the IPv6 forum) and at first I had four channels upstream. It always had transmit power in the 50s on all channels. Then it started dropping to one channel upstream. I got the leased modem back due to the IPv6 issue, and it has always had a blinking US. Sometime while I had my customer-owned modem, the signal quality must have got just a little bit worse.

 

Funny enough, the Internet service feels fine. Speed tests exceed the rated speed, my SSH sessions don't lag, and I was playing with streaming video yesterday without any problems. The modem is doing a good job of hiding the fact that it can barely transmit.

 

I just hope it doesn't degrade some more and stop working. I live and work on the Internet, and my backup is metered LTE wireless. Using that for very long would get expensive.

 

Update: as of this morning, I only have one upstream channel.

4LockedQAM16442560 Ksym/sec37000000 Hz52.2 dBmV

 

Now what?

Expert

Re: Upstream light blinking on Technicolor TC4310

Take and post a couple pictures of the rats nest. It may give me some ideas but I'll bet they have the wrong type amplifier there.

 

This may be related to the IPv6 issues since the connection is not solid.

 Adding the attenuator forced your modems to tx at full power upstream and 2 channels don't have enough level any more, the 3rd is on the edge.

 Any upstream tx above +50.0 dBmv is an issue at +52 a major problem

Participant

Re: Upstream light blinking on Technicolor TC4310

The box has a cover on it. I just got a look when he had it open. Is it time to just contact customer service? I just rebooted and had a long delay before it synced. Now showing:

Upstream Channel
ChannelLock StatusModulationChannel IDSymbol RateFrequencyPower
1LockedQAM64435120 Ksym/sec30600000 Hz57.0 dBmV
2Not LockedUnknown00 Ksym/sec 0.0 dBmV
3Not LockedUnknown00 Ksym/sec 0.0 dBmV
4Not LockedUnknown00 Ksym/sec 0.0 dBmV
Expert

Re: Upstream light blinking on Technicolor TC4310

Get TWC back out, +57 is a serious problem. Modem gave up on bonding and has resorted to a last dich effort to stay connected by diverting all upstream power to one channel

It is also rumored that Ipv6 requires 2 bonded channels, one for ipv4 and the second for IPv6.

 

 printout the level pages you posted here for the tech and tell him it needs to be escallated to the amplifier crew if he doesn't find something obvious. ( home techs not allowed to touch trunk amplifiers)

 There is a serious imballance between your up and downstream levels, something is wrong with the 5-45 mHz reverse path

 Get a photo of the box with cables and a second of where the cable from the building connects to the pole tap/ splitter if it's overhead

 

Participant

Re: Upstream light blinking on Technicolor TC4310

I am on with chat support. The first support rep sent a reconfiguration signal and had me power cycle. It briefly went to four channels and powers in the 40s. Then went back to two channels and high power - I'm assuming the error rate was too high. Now on with second rep from work.

 

Between this and the IPv6 problem, I must be flagged as a problem customer in their system by now!

 

Update: tech on chat is insisting I need a new modem. I copied your last post to him, and told him that a SB6183 had the same problem. He doesn't believe me and keeps saying I need a new modem.

 

Tech on chat, who said he was level 3, was unable to do anything except tell me to get a new modem. He said this one is obsolete, even though I just got it from the store. I sent him your last post and that did not help. Right now I have two channels and the service is stable. I don't think there is much else I can do unless it fails.