In the Downstream Bonded Channels section, verify Power levels are within the acceptable range of - 15 dBmV to + 15 dBmV for each downstream channel. Upstream. Rebooted cable modem, modem then router, just router, etc. Downstream Bonded Channels. 4 4 Locked SC-QAM 18896000 Hz 3200000 Hz 37.1 dBmV. It's a 24x8. Ideally, it should be as close to zero as possible. Signal-to-noise ratio. 2. Signal-to-noise ratio (often abbreviated SNR or S/N) is an electrical engineering measurement defined as the ratio of a signal power to the noise power corrupting the signal. Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 1 5120 Ksym/sec 36500000 Hz 40.8 dBmV 2 Locked ATDMA 2 5120 Ksym/sec 30100000 Hz 41.3 dBmV 3 Locked ATDMA 3 5120 Ksym/sec 23700000 Hz 40.3 dBmV 4 Locked ATDMA 4 5120 Ksym/sec 17300000 Hz 38.8 dBmV . In the Downstream Bonded Channels section, identify the Modulation and Power to find verify SNR levels are within the acceptable range for each downstream channel. The modem has successfully connected to an upstream frequency on the cable connection. Upstream Bonded Channels Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power 1 Locked ATDMA 2 5120 Ksym/sec 29400000 Hz 54.0 dBmV. So looks like that part is alright for you. Here is the screenshot after modem was rebooted 17 hrs ago. What do your readings mean (Upstream)? For the past two days, when I . In the Upstream Bonded Channels section, identify the number of Channels, Type, Symbolic Rate to find verify Upstream Power levels are within the acceptable range for each upstream channel. Just because your modem is capable of 8 upstream channels, doesn't mean all 8 are used. These are classified into two types, upstream and downstream. As a comparison, DOCSIS 3.x modems support 128QAM upstream. Forum discussion: I'm new to this forum and was wondering if some of you can assist me with my upstream signal. 3 3 Locked SC-QAM 23696000 Hz 6400000 Hz 38.4 dBmV. Acceptable SNR Levels (dB) : If QAM64 , SNR should be 23.5 dB or greater. My plan was MAXX 300/20Mbps (way back when it was first implemented by TWC here in Los Angeles). In the Upstream Bonded Channels section, identify the number of Channels, Type, Symbolic Rate to find verify Upstream Power levels are within the acceptable range for each upstream channel. General Configuration Network access Allowed Maximum . I have no trouble with the downstream channels, all 24 are locked. Verify all cable connections and try resetting the modem. These are classified into two types, upstream and downstream. How many are used is dependant on the local CMTS/node configuration, and potentially what level of service you subscribe to. Download speed and upload speed are important factors when choosing the right cable modem for your needs. I've twice been promised a firmware upgrade and nothing has happened. You'll have some downstream channels and also some upstream channels. Can you suggest what affects this would have and how to get it rectified? Upstream Bonded Channels. Downstream power levels should be between -10 dBmV and 10 dBmV. My bonded download channel was 24 and bonded . 1 1 Locked SC-QAM 37104000 Hz 6400000 Hz 39.9 dBmV. The upstream channels would usually lock the first 3 but will now also only occasionally will lock. 2 Locked QAM256 1 495000000 Hz -4.0 dBmV 36.3 dB 5876160 3055 8882. Downstream power levels should be between -10 dBmV and 10 dBmV. Here is a screenshot of the channel info: The downstream power level ranges between -5.8 and -11.5 dBmV, and SNR between 34.93 and 37.36 dB for all the 24 channels (out of 32). Learn more about our Cable Modems & Routers: http://bit.ly/2aQXgklSubscribe for more videos: http://bit.ly/1JsK6Ej Channel bonding is a way of aggregating d. The header in Column-3 of your log reads 64QAM. We are doing testing for 8x4 Channel Bonding, and are seeing an unusual phenomenon. Each one has separate power levels and SNR listed for it. Upstream data from the subscriber comes through the upstream ports (US0-US19) that are automatically configured on the cable interface line card. Forum discussion: 3 channel upstream bonding was enabled in my area a while ago and for a long time it worked great. Good Downstream power levels are within -7 to +7 dBmV. RAW Paste Data No internet access. Downstream. Hello, I have a Netgear Nighthawk AC1900 c7000v2 Cable Modem Router. 2. . Interestingly, if we use 2 1GHz splitters, it will lock on. Upstream Bonded Channels Lock Status Modulation Channel ID Symbol Rate Frequency Power Locked ATDMA 2 5120 Ksym/sec 53400000 Hz 53.5 dBmV Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV Not Locked Unknown 0 0 Ksym/sec 0 Hz 0.0 dBmV . Channel bonding is optional. Downstream Bonded Channels Upstream Bonded Channels. The upstream channels, however, only half of them lock (channels 1-4). Notice! Forum discussion: I am in Los Angeles, CA 90065. Acceptable Upstream Power Levels (dBmV): Then explain to them that you're having issues bonding channels and a ton of post-ber and they'll know what to look for. You should see four channels listed. Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords. Blue - solid: The modem is connected with upstream multi-channel bonding. Channel Channel ID Lock Status US Channel Type Frequency Width Power. Password: Forgot your password? Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables; 1: Locked: QAM256: 1: 753000000 Hz: 2.6 dBmV: . Sign in to view or modify your modem settings. Verify all cable connections and try resetting the modem. 37-55 dbmV are usually "good" (but may depend on the modem). When the modem was new, it was always bonded to 4 channels, and it started only bonding to 2 and . Upstream power is the power used by your modem to send data. Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power; 1: Locked: ATDMA: 1: 5120 Ksym/sec: 23800000 Hz: Verify all cable connections and try resetting the modem. There is a report named Digital lock in amplifier: study, design and development. many thanks. There may be from 1 to 4 channels shown with Lock Status 'Locked'. E-mail: Please enter your e-mail address. Low downstream power is bad. Upstream Bonded Channels. 2 2 Locked SC-QAM 30704000 Hz 6400000 Hz 39.9 dBmV. Solid Green: None - one upstream channel is in use: Blinking Green: Scanning for an upstream channel. Upstream Bonded Channels Channel Lock Status Channel Type Channel ID Symb. Channel Channel ID Lock Status US Channel Type Frequency Width Power 1 65 Locked SC-QAM Upstream 17300000 Hz 6400000 Hz 33.0 dBmV 2 66 Locked SC-QAM Upstream 23700000 Hz 6400000 Hz 33.0 dBmV 3 67 Locked SC-QAM Upstream 30300000 Hz 6400000 Hz 34.0 dBmV 4 68 Locked SC-QAM Upstream 36700000 Hz 6400000 Hz 36.0 dBmV Upstream Bonded Channels Channel Channel ID Lock Status US Channel Type Frequency Width Power 1 2 Locked SC-QAM Upstream 29400000 Hz 6400000 Hz 47.0 dBmV 2 1 Locked SC-QAM Upstream 35800000 Hz 6400000 Hz 46.0 dBmV 3 3 Locked SC-QAM Upstream 23000000 Hz 6400000 Hz 47.0 dBmV In the Upstream Bonded Channels section, identify the number of Channels, Type, Symbolic Rate to find verify Upstream Power levels are within the acceptable range for each upstream channel. 1 1 Locked SC-QAM 37104000 Hz 6400000 Hz 39.9 dBmV. Comcast will only deliver the 1 Gigabit speed tier via the DOCSIS 3.1 / OFDM modulated downstream channel, not via the multiple bonded QAM 256 modulated channels, although having enough of them bonded together are theoretically capable. Password: Router Status. I have Comcast ISP and have my own modem, NetGear C6300. In less technical terms, signal-to-noise ratio compares the level of a desired signal (such as music) to the level of background noise. Verify all cable connections and try resetting the modem. 3 3 Locked SC-QAM 23696000 Hz 6400000 Hz 38.4 dBmV. Green . Interestingly, if we use 2 1GHz splitters, it will lock on. . Channel Channel ID Lock Status US Channel Type Frequency Width Power. Good Upstream power levels are within 38-48 dBmV. We are doing testing for 8x4 Channel Bonding, and are seeing an unusual phenomenon. Hoping for a bit of advice, I have checked the router status and within the "upstream" tab it shows that I have only 2 locked downstream channels rather than 4? So basically I have a "24x4" modem router. STATUS: Green - blinking The modem is registering with the cable network of the Internet Service Provider (ISP). Both software reboots through Xfinity service center (modem) and router admin panel. Note that no other upstream channels are even listed in the status. With 1GHz splitters (2-, 3-, 4-way) and with 1.2GHz (2-, 3-, 4-way) our test modems will not lock onto all 8 channels down; however, when we use our IPTV/MoCA1.1 1.5GHz splitters (2-, 3-, 4-way) they will lock onto all 8 downstreams. The other half (5-8) won't lock. Downstream and upstream power levels are important when determining if the cable line that is connected to your cable modem or modem router is receiving sufficient power. Upstream bonded channels Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts 1 ATDMA 0 0 0 0 2 ATDMA 0 0 0 0. The modem used to bond to all 4 channels, now it only bonds to 2 channels. Upstream bonded channels. Acceptable SNR Levels (dB) : If QAM64 , SNR should be 23.5 dB or greater. On tech rep said he reviewed the version I have and noted there was a later revision that addressed upstream bonding problems. Network devices treat the aggregation as if it is a single link, which increases fault tolerance and provides load sharing. Downstream Bonded Channels. 3. Look under the tab labeled Upstream Bonded Channels. My SNR and power levels are all well within acceptable ranges and I bond to all 4 channels upstream. Restrictions for Downgrading Channel Bonding in Battery Backup Mode. However, I am having an issue with downstream channel bonding. Channel Bonding At the heart of DOCSIS 3.0 is the channel bonding architecture; channel bonding in the downstream and upstream allows speeds topping 170 Mbps in the downstream and 120 Mbps in the upstream direction. Channel bonding increases the throughput capabilities substantially and offers a competitive solution to the DSL/telco networks. Upstreams won't bond with a 57 upstream though. Off: No upstream . In the Upstream Bonded Channels section, identify the number of Channels, Type, Symbolic Rate to find verify Upstream Power levels are within the acceptable range for each upstream channel. Solid Green: None - one upstream channel is in use: Blinking Green: Scanning for an upstream channel. Therefore, not only can a D3 modem bond multiple channels, but also double the bandwidth of each channel of a D2 modem. In the Downstream Bonded Channels section, identify the Modulation and Power to find verify SNR levels are within the acceptable range for each downstream channel. Ideally, it should be as close to zero as possible. Startup Procedure Procedure Status Comment Acquire Downstream Channel 153000000 Hz Locked Connectivity State OK Operational Boot State OK Operational Configuration File OK Security Enabled BPI+ Downstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables 1 QAM256 153000000 Hz 0.3 dBmV 40.3 . A bonded channel combines two Ethernet interfaces into a single logical link or link aggregation group (LAG). Channel widths— If two upstreams are being load balanced, and one upstream is configured with a channel width of 1.6 MHz and the other upstream is configured for a channel width of 3.2 MHz, the Cisco CMTS allocates twice as many cable modems to the second upstream because its channel width is twice as large as the first upstream channel width. I got a nice Netgear Nighthawk XR500 (works great, very nice), and a CM1200 modem to handle modem duties for my Spectrum service. OFF: There is NO upstream activity on the cable connection. *PATCH 4.19 000/114] 4.19.93-stable review @ 2020-01-02 22:06 Greg Kroah-Hartman 2020-01-02 22:06 ` [PATCH 4.19 001/114] scsi: lpfc: Fix discovery failures when target device connectivity bounces Greg Kroah-Hartman ` (116 more replies) 0 siblings, 117 replies; 135+ messages in thread From: Greg Kroah-Hartman @ 2020-01-02 22:06 UTC . There's normally an issue with errors in the upstream that cause it to max transmit to try to transmit the . Downstream/Upstream Channel Locking. Current firmware version is: SBG6580-3.5.8.4-GA-00-505-NOSH. It allows me to get over 10 Mbps upstream speeds. General Configuration Network access Allowed Maximum . Acceptable Upstream Power Levels (dBmV) The downstream and internet lights are solid green, but the upstream will continuously flash. None - multiple upstream channel is in use: Blinking Blue: Negotiating multiple upstream bonded channels. In the Downstream Bonded Channels section, identify the Modulation and Power to find verify SNR levels are within the acceptable range for each downstream channel. If he has 24 downstreams he will have at least 3 upstreams. For the 'Locked' channels, note the Power level(s) shown in the Pwr column. Upstream Channel lock is fixed but the downstream channels are producing a lot of codeword errors. Channel Channel ID Lock Status US Channel Type Frequency Width Power 1 65 Locked SC-QAM Upstream 17300000 Hz 6400000 Hz 33.0 dBmV 2 66 Locked SC-QAM Upstream 23700000 Hz 6400000 Hz 33.0 dBmV 3 67 Locked SC-QAM Upstream 30300000 Hz 6400000 Hz 34.0 dBmV 4 68 Locked SC-QAM Upstream 36700000 Hz 6400000 Hz 36.0 dBmV 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. Codeword errors the power used by your modem to send data what level of you... 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