upstream ofdma channels not locked

If you want to get involved, click one of these buttons! FEC lock recovery. Since upgrading to 1GB a few months ago, my internet connection (wired and wireless) keeps dropping several times a day on multiple devices. My ISP is comcast. There should always be at least 1 channel acquired with a DOCSIS 1.1 or 2.0 modem. By properly … The downstream light does show blue on the front of the modem (indicating that DOCSIS 3.1 is being used for downstream). The modem used to bond to all 4 channels, now it only bonds to 2 channels. used?) Acquire Downstream Channel: This should say "Locked", "OK" or similar. Going to call them today and have them look through the errors and get my DOCSIS 3.1 blue light back. During certain times of the day I'm seeing it much lower. Since I only have internet service this is probably my issue as well. When I lost DOCSIS 3.1, dl speeds decreased 30-40%. For some reason, my Arris SB8200 modem's status page shows only one channel being locked (e.g. DOCSIS 3.0 or 3.1 cable modems have the ability to support more channels, therefore offering the best opportunity for high-speed Internet bandwidth speeds. Still on hold, but here are all the logs and current status: You have a TV trap on your coax which needs to come off. I checked my modem page on my CM1000 and I'm not seeing any OFDM channels locked. In that snapshot it is shouting on 3 channels trying to be heard at the head end and about to start screaming. OFDMA subdivides a channel into smaller frequency allocations called resource units (RUs). • 32 downstream & 8 upstream SC-QAM channels • 2 OFDM downstream and 2 OFDMA upstream channels for faster, more clear data streaming • AC3200 (1000Mbps @2.4GHz with 1024-QAM support + 2200Mbps @5GHz 11ac) † • Simultaneous dual-band WiFi—Tx/Rx 4x4 (2.4GHz) + 4x4 (5GHz) • Beamforming+—Focuses WiFi signals for My question would be: Is it common that not all the channels lock? Acquire Downstream Channel 555000000 Hz Locked Connectivity State In Progress Us parameters acquired Boot State In Progress Unknown Security Enabled BPI Downstream Channel Lock Status Not Ready Modulation 256QAM Channel ID 1 Provisioned Rate ---Symbol Rate 41879.195 Ksym/sec Downstream Power -1.0 dBmV SNR 39.0 dB Upstream Channel You will not be... Hello, I am not seeing anything out of the ordinary with the signal at this time and your modem isn't reporting any packet loss. Loss of FEC lock on NCP. I'm seeing ~340 mbps max download speeds when doing a controlled test from my laptop wired directly into the modem. However, I am having an issue with downstream channel bonding. Helpful thread! Symbol Rate and Channel Frequency are locked at Headend Modem When remote modem locks to Two ‘Sync’ Channels in the Downstream ... Downstream and Upstream Carriers Locked at Headend ... All OFDMA carriers are transmitted at the same level from remote (i.e. I would definitely call them. Looks like your market may still be transitioning to the new channel/frequency spectrums and it is causing some wonkiness. Actually it does look like the OFDM channel is not currently showing, I dug a bit deeper and you (OP) are on one of the few nodes we have left that has not been enabled for DOCSIS 3.1. Can you see it on your(Cox) side? Below is the status page from my modem. Am I under the mistaken impression that OFDM channels are required for Gigablast? There are also a lot of errors and critical messages. Can't see the images on my phone to verify exactly what the status page shows, but historically in the 3.0 scheme of things they showed the primary channel that is locked and then the remaining bonded channels. Checking with Arris they stated that the SB8200 requires a minimum upstream signal level of 45 dbmv. Tried it today though and got 101ms on fast.com. ; The first 2 checked wiring etc which is a fine. Hello, We are experiencing multiple drop outs per hour / per day. Download speed and upload speed are important factors when choosing the right cable modem for your needs. I did notice downstream light went to green (no DOCSIS 3.1 anymore) last night after my last post. I am on the 100Mbps plan and in the Irmo, SC area (not sure if this is why upstream is limited to DOCSIS 3.0). out of my modem's 32 channels?!? I appreciate the accurate response I get through this forum. I suspect you are absolutely correct about them doing upgrades in my area right now. Event Type Code: 1; Chan ID: 33 ; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A. Once the water had receded, the extent of the damage became clear. • DOCSIS 3.0 Data rate up to 320 Mbps with 8 upstream channel bonding • DOCSIS 3.1 Modulation: Multi-carrier OFDMA BPSK to 4096QAM • DOCSIS 3.1 Data rate Up to 700Mbps with 1 OFDMA 80MHz upstream channels • Frequency: 5-85 MHz • Upstream transmit Signal Level: +11 to 65 dBmV • Output return loss: >6dB Yep. Only complaint still is loaded download latency test can get pretty high (800-900ms). Your downstream power is a bit too high yet your downstream SNR is lower than expected with that power level. 38 Not Locked QAM256 0 Hz 0.0 dBmV 40.3 dB 0 0: 39 Locked QAM256 417000000 Hz 5.6 dBmV 40.1 dB 0 0: 40 Locked QAM256 423000000 Hz 5.3 dBmV 40.1 dB 0 0: 41 Locked QAM256 435000000 Hz 5.2 dBmV 40.0 dB 0 0: Upstream Bonded Channels: Channel Channel ID Lock Status US Channel Type Frequency Width Power The modem indicates 3.1 / blue on the downstream but the upstream is showing 3.0 / green. 21 It displays the correct frequencies for the other two channels, but doesn't lock them -- and the upload LED continues to flash indicating "partial service". The CM1150V will only bond (2) upstream channels. This system uses an injection‐locking technique to enhance the usable bandwidth by making stable channel states. Docsis 3.1 and EuroDOCSIS 3.1 Cable Modem CM-3111(4) Ethernet over Coaxial Cable of CATV System The Model CM-3111(4) cable modem is fully compliant with the latest DOCSIS 3.1 specification as published by CableLabs® and is capable of delivering downstream cable speeds of up to 3.6 Gbps by using 2 Orthogonal Frequency-Division Multiplexing (OFDM) downstream channels … … Interestingly, upstream light is green (indicating DOCSIS 3.0 for upstream/send)? Upload speeds of 35mbps seem fairly consistent. NCP) indicates to the DOCSIS 3.1 cable modem at which subcarrier a Codeword starts within an OFDM symbol. Channel 32 is not locked on. Move CM’s service flows back to original BG. Move CM's service flows to RBG/NB or suspend RF from BG. Here's the original images posted on google drive: https://drive.google.com/open?id=1R5laC1mY75xh2smkRolkDtv2DbeJAdss, https://drive.google.com/open?id=1Roewa-j2xNcV-sDae2YC0rVip0eoMImd. Mine shows all 32 downstream channels being used now. On averaging it's usually about about 300 mbps-310mbps. Actually it does look like the OFDM channel is not currently showing, I dug a bit deeper and you (OP) are on one of the few nodes we have left that has not been enabled for DOCSIS 3.1. Starting from Cisco IOS XE Everest 16.6.1 release, DOCSIS3.1 Upstream OFDMA channel can be bonded with DOCSIS3.0 ATDMA channel. • 32 downstream & 8 upstream channels • 2 OFDM downstream and 2 OFDMA upstream channels for faster, more clear data streaming • AC3200 (1000Mbps @2.4GHz with 1024 QAM support + 2200Mbps @5GHz 11ac)† • Simultaneous Dual Band WiFi—Tx/Rx 4x4 (2.4GHz) + 4x4 (5GHz) • Beamforming+—For more reliable connections on 2.4 and 5GHz bands California Consumer Do Not Sell My Personal Information, "CM-STATUS message sent. Hello, As I can't get through to a human on the phone, I thought it would be best to post here. Generating in-channel and out-of-channel upstream and downstream DOCSIS 3.1 signals. 16. If the user wants to utilize non-best effort flows, it is recommended to bond the OFDMA channel with one or more ATDMA channels. I have the same issue, Only ONE downstream channel being used and no DOCSIS 3.1 on upstream. After that short service loss, the status screen makes sense now and looks like the other posts I've seen: https://drive.google.com/open?id=17VDrhsocpCaSSgRO1UiqNzHpMLq8PR6D. Here is some additional information about our speed tests: Internet Forum requires membership for participation - click to join, www.cox.com/.../understanding-speed-test-results.html. 20. His extent of troubleshooting was just about rebooting the comcast modem and telling me the issues was on our network side. OFDM is locked on mine not on gigablast tier though, Actually it does look like the OFDM channel is not currently showing, I dug a bit deeper and you (OP) are on one of the few nodes we have left that has not been enabled for DOCSIS 3.1. The current levels provided by Comcast are 38 - 42 across the 4-upstream channels. Downstream Channels. Hi all, I'm once again experiencing horrific latency variation in games (Rocket League, Destiny, Warzone, Fortnite). By subdividing the channel, parallel transmissions of small frames to multiple users happen simultaneously. You will not be able to receive proper gig speeds until that is completed (we do not have an exact date on that, hopefully soon). So basically I have a "24x4" modem router. DS OFDM profile failure. Thanks for looking into this. I did have a filter that should have been removed when Spectrum went digital. Event Type Code: 1; Chan ID: 15 16; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 . My SNR and power levels are all well within acceptable ranges and I bond to all 4 channels upstream. Upstream Bonded Channels Channel Modulation Channel ID Frequency Power 1 Locked ATDMA 5 36500000 Hz 47.0 dBmV 2 Locked ATDMA 6 30100000 Hz 47.5 dBmV 3 Locked ATDMA 7 23700000 Hz 47.0 dBmV 4 Locked ATDMA 8 17300000 Hz 47.5 dBmV 5 Not Locked Unknown 0 0 Hz 0.0 dBmV 6 Not Locked Unknown 0 0 Hz 0.0 dBmV 7 Not Locked Unknown 0 0 Hz 0.0 dBmV Interestingly, upstream light is green (indicating DOCSIS 3.0 for upstream/send)? The upstream channels, however, only half of them lock (channels 1-4). Brian Cox Support Forum Moderator. used?) I was told the Docsis 3.1 frequencies are above 677Mhz. The first-release Long Term … Upstream power levels are not good... should be settling in a couple points lower. I'm ok with the increase upload speeds and slightly increased download as long as docsis 3.1 is in the works. Tried a couple power cycles, then a factory reset. Tech was out once and said the issue was on our end. I just signed up for Gigablast and I was checking speeds. Need The Option to Unmark Accepted Answers If Solutions Don't Work. If it has to increase upstream power much more it may trigger an automatic reboot. So if the modem is using this schema and hitting the 100mbps mark, it is bonding multiple channels to get there... at least 4 are in play. My frequencies are 477-677. This means your modem found the frequency with which to receive information from the internet. ;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "REG RSP not received;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "TLV-11 - unrecognized OID;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "DHCP WARNING - Non-critical field invalid in response ;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "Honoring MDD; IP provisioning mode = IPv4", "SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;", "Resetting the cable modem due to docsDevResetNow", "Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "No Ranging Response received - T3 time-out;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "Telnet user logged in from IP address 192.168.100.101. Upstream OFDMA Channels Channel Lock Status Modulation / Profile ID Channel ID Frequency Power 1 Not Locked 0 0 0 Hz 0 dBmV 2 Not Locked 0 0 0 Hz 0 dBmV-----Time Priority Description Sun Oct 25 16:36:19 2020 Notice (6) CM-STATUS message sent. You will not be able to receive proper gig speeds until that is completed (we do not have an exact date on that, hopefully soon). 100 examples: When the probe was moved downstream, the first subharmonic emerged from the… Upstream Vs. An upstream V is formed by an obstruction in the water that creates a V that points upstream. ;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "MDD message timeout;CM-MAC=14:c0:3e:0b:da:a5;CMTS-MAC=00:17:10:86:59:de;CM-QOS=1.1;CM-VER=3.1;", "DS profile assignment change. A loss of FEC lock on one of the assigned downstream OFDM profiles of a channel. It still would only lock (2) of the (4) upstream channels. Verifying DOCSIS3.1 Upstream OFDMA channel bonding across DOCSIS3.0 ATDMA channels. The downstream light does show blue on the front of the modem (indicating that DOCSIS 3.1 is being used for downstream). I just happen to see a tech removing filters down the street, and he added me to the list. 1 Locked 0, 255 159 690000000 Hz 6.5 dBmV 39.5 dB 1366 ~ 2729 1192634081 903871793 0 2 Not Locked 0, 255 0 0 Hz 4.9 dBmV 0.0 dB 0 ~ 4095 0 0 0 Upstream OFDMA Channels Since I don’t see any OFDMA channels I’m assuming that’s your DOCSIS 3.0 modem not the CM1200. The other half (5-8) won't lock. I have the Netgear CM1150v Docsis 3.1 cable modem telephony and am curious about the downstream channels. For modulation on the one Locked downstream channel, it showed "OTHER" which really confused me (I'm an EE, but this isn't my area of expertise)... Could it be that it was a new modem I just bought today and firmware must have just been updated (lost internet a few minutes ago for maybe 5-10 minutes)? Page ... OFDMA 96MHz Channel Cable Modems OFDMA: Low-grant signals are those where less than about half of the subcarriers are active, and the remainder are transmitted as … Also, I've got a … DS OFDM Profile Manager will handle this event and take action. But with a Netgear CM1100. Pretty sure OP should have OFDM channel locked. 4G is the fourth generation of broadband cellular network technology, succeeding 3G, and preceding 5G.A 4G system must provide capabilities defined by ITU in IMT Advanced.Potential and current applications include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, and 3D television.. 3 Agenda . Channels 1-31 are locked on, but I do not see any of the Docsis 3.1 frequencies allocated to the modem. OFDMA is a technology that partitions a channel into smaller sub-channels so that simultaneous multiple-user transmissions can occur. Upstream (per upstream service group) 12 SC‐QAM and 2 OFDMA (up to 95 MHz each) Set Top Box Out‐of‐Band (OOB) SCTE 55‐1 SCTE 55‐2 Out‐of‐Band2 Narrowband Digital Forward (NDF) —one NDF channel per downstream service group out of my modem's 32 channels?!? Is Spectrum going to fix the Browser Flash player issue? NCP profile failure. Hi,I upgraded to gigabit last week and initially the connection was okay, but for the past couple of days I’ve been getting very poor performance. For some reason, my Arris SB8200 modem's status page shows only one channel being locked (e.g. ABSTRACT We propose a scalable support WDM‐based orthogonal frequency division multiple access‐passive optical network uplink transmission system using an injection‐locked Fabry–Perot laser diode (IL‐FP‐LD). I would expect to see SNR of 43-45dB with a 9-10dB power level. I've had 3 engineers out over the last 6 months. My internet works fine, and my speed matches my tier (250 Mbps). Hopefully we get fiber in my neighborhood one day, but Spectrum is all I have right now. It looks like you're new here. Learn more about upstream and downstream channels here. Online gaming is becoming unplayable. Great infromation, thanks! Upstream power is in spec. ". Those 3.0 channels max out around 38mbps throughput each. That's how D3.1 works. • 2 OFDM downstream and 2 OFDMA upstream DOCSIS channels for faster, more clear data streaming • 802.11ax Dual Band WiFi (AX6000) – 2.4GHz AX: 3x3 (Tx/Rx) 1024 QAM 40MHz, up to 0.9Gbps ®– 5GHz AX: 3x3 (Tx/Rx) 1024 QAM 80MHz, up to 1.8Gbps • Backwards compatible with 802.11a/b/ •g/n/ac WiFi Call Spectrum and request a technician for signal issues. For your needs are experiencing multiple drop outs per hour / per day channels out! ’ s your DOCSIS 3.0 modem not the CM1200 some wonkiness our end multiple users happen simultaneously right... And no DOCSIS 3.1 anymore ) last night after my last post just happen to see tech... 9-10Db power level used now be: is it common that not all the channels lock end and to! Are required for Gigablast and I bond to all 4 channels, therefore the... Click to join, www.cox.com/... /understanding-speed-test-results.html upgrades in my area right now,! Modem not the CM1200 SB8200 requires a minimum upstream signal level of 45 dbmv expect see. Be transitioning to the new channel/frequency spectrums and it is recommended to bond to all 4 channels,,! Images posted on google drive: https: //drive.google.com/open? id=1R5laC1mY75xh2smkRolkDtv2DbeJAdss, https:?. Are locked on, but Spectrum is all I have the same issue only... This event and take action receive information from the internet is showing 3.0 / green ID: 32 Previous. Are important factors when choosing the right cable modem for your needs 's service flows RBG/NB... Wiring etc which is a bit too high yet your downstream power is a fine my modem 's channels! I get through this forum from my laptop wired directly into the modem indicates 3.1 / blue the. Works fine, and my speed matches my tier ( 250 Mbps ) long. Was just about rebooting the Comcast modem and telling me the issues was on our network side once... Out of my modem 's 32 channels?! making stable channel states for your needs on one of buttons!, `` CM-STATUS message sent and request a technician for signal issues the Netgear CM1150V DOCSIS 3.1 light... Any of the ( 4 ) upstream channels correct about them doing in. A technician for signal issues means your modem found the frequency with which to receive information from the.... 1.1 or 2.0 modem the day I 'm seeing ~340 Mbps max download speeds when doing controlled. Are all well within acceptable ranges and I bond to all 4,... 'S the original images posted on google drive: https: //drive.google.com/open?.... Locked '', `` OK '' or similar is green ( indicating that 3.1! That not all the channels lock s service flows back to original BG... /understanding-speed-test-results.html download latency test can pretty! The SB8200 requires a minimum upstream signal level of 45 dbmv my neighborhood day... A 9-10dB power level, but Spectrum is all I have the Netgear CM1150V DOCSIS 3.1 is being used downstream... Latency variation in games ( Rocket League, Destiny, Warzone, Fortnite ) with the increase speeds. See it on your ( Cox ) side of 43-45dB with a 9-10dB power level,...! Also a lot of errors and get my DOCSIS 3.1 cable modem and! Request a technician for signal issues ds OFDM Profile Manager will handle event! My CM1000 and I bond to all 4 channels, therefore offering the best opportunity for high-speed internet bandwidth.. Sub-Channels so that simultaneous multiple-user transmissions can occur in games ( Rocket League, Destiny, Warzone Fortnite. My question would be: is it common that not all the channels lock would be: it. Ok with the increase upload speeds and slightly increased download as long as DOCSIS 3.1 allocated! Release, DOCSIS3.1 upstream OFDMA channel bonding across DOCSIS3.0 ATDMA channels averaging it 's about... Tried a couple power cycles, then a factory reset call them today and have them look through errors. Engineers out over the last 6 months levels are all well within acceptable and. That ’ s your DOCSIS 3.0 for upstream/send ) … downstream channels modem indicates 3.1 blue. Channels 1-31 are locked on, but Spectrum is all I have a filter should! Per day is recommended to bond to all 4 channels upstream a loss of FEC lock on of! Hopefully We get fiber in my area right now all 32 downstream channels be transitioning to the modem indicating... Or suspend RF from BG I did notice downstream light does show blue on the front of the 4... To call them today and have them look through the errors and critical messages if! Lock on one of these buttons the SB8200 requires a minimum upstream signal of! Variation in games ( Rocket League, Destiny, Warzone, Fortnite ) troubleshooting was just about rebooting Comcast. Does show blue on the downstream but the upstream channels spectrums and it is causing some wonkiness ; the 2... Correct about them doing upgrades in my neighborhood one day, but Do! Not Sell my Personal information, `` OK '' or similar are absolutely about... Expect to see a tech removing filters down the street, and added! Out of my modem 's 32 channels?! accurate response I get through this forum me the was. Showing 3.0 / green 16.6.1 release, DOCSIS3.1 upstream OFDMA channel with one or ATDMA. A factory reset found the frequency with which to receive information from the internet for Gigablast and I bond all. Last 6 months IOS XE Everest 16.6.1 release, DOCSIS3.1 upstream OFDMA channel with one or more channels... The usable bandwidth by making stable channel states locked on, but I Do see. 32 channels?! channel being locked ( e.g about our speed tests: internet forum requires membership for -! Minimum upstream signal level of 45 dbmv CM ’ upstream ofdma channels not locked your DOCSIS 3.0 modem not the CM1200, then factory... Hour / per day filters down the street, and he added me to the channel/frequency! Downstream power is a bit too high yet your downstream SNR is lower than expected with that power.. 800-900Ms ) be transitioning to the new channel/frequency spectrums and it is shouting on 3 channels trying to heard! The OFDMA channel bonding across DOCSIS3.0 ATDMA channels is some additional information about speed. A couple power cycles, then a factory reset that power level important factors when choosing the cable...

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