Downstream/Upstream Channel Locking. 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. The other half (5-8) won't lock. 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 We are doing testing for 8x4 Channel Bonding, and are seeing an unusual phenomenon. Interestingly, if we use 2 1GHz splitters, it will lock on. 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 In less technical terms, signal-to-noise ratio compares the level of a desired signal (such as music) to the level of background noise. From Teddington Lock to the head of navigation, the navigation authority is the Environment Agency. 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. 1 1 Locked SC-QAM 37104000 Hz 6400000 Hz 39.9 dBmV. Good Downstream power levels are within -7 to +7 dBmV. Downstream. Note that no other upstream channels are even listed in the status. General Configuration Network access Allowed Maximum . Notice! Upstreams won't bond with a 57 upstream though. Upstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power 1 Locked ATDMA 1 35800000 Hz 49.0 dBmV 2 Locked ATDMA 2 29400000 Hz 49.0 dBmV 3 Locked ATDMA 3 23000000 Hz 48.8 dBmV 4 Locked ATDMA 4 16600000 Hz 48.5 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 . Sign in to view or modify your modem settings. My issue is that the CM1200 will lock 31/32 of the downstream channels, but only 1/8 upstream channels. 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. My bonded download channel was 24 and bonded . No internet access. We are doing testing for 8x4 Channel Bonding, and are seeing an unusual phenomenon. Here is the screenshot after modem was rebooted 17 hrs ago. I'll give the back story . 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). 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 Channel bonding is optional. 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. Download speed and upload speed are important factors when choosing the right cable modem for your needs. Password: Router Status. Verify all cable connections and try resetting the modem. Upstream power is the power used by your modem to send data. A bonded channel combines two Ethernet interfaces into a single logical link or link aggregation group (LAG). Therefore, not only can a D3 modem bond multiple channels, but also double the bandwidth of each channel of a D2 modem. These should all be within three dB of each other. 2. . The modem has successfully connected to an upstream frequency on the cable connection. 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. None - multiple upstream channel is in use: Blinking Blue: Negotiating multiple upstream bonded channels. What do your readings mean (Upstream)? The Upstream Channel Bonding feature is supported on the Cisco cBR-8 router. You should see four channels listed. 1 1 Locked SC-QAM 37104000 Hz 6400000 Hz 39.9 dBmV. 3 3 Locked SC-QAM 23696000 Hz 6400000 Hz 38.4 dBmV. Done pull-power-plug resets of both devices. 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 . 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? You're only supposed to have 1 channel per stream. You'll have some downstream channels and also some upstream channels. Acceptable Upstream Power Levels (dBmV) Channel bonding increases the throughput capabilities substantially and offers a competitive solution to the DSL/telco networks. 37-55 dbmV are usually "good" (but may depend on the modem). Blue - solid: The modem is connected with upstream multi-channel bonding. Rebooted cable modem, modem then router, just router, etc. Downstream Bonded Channels Upstream. Both software reboots through Xfinity service center (modem) and router admin panel. 4 4 Locked SC-QAM 18896000 Hz 3200000 Hz 37.1 dBmV. STATUS: Green - blinking The modem is registering with the cable network of the Internet Service Provider (ISP). For the past two days, when I . My SNR and power levels are all well within acceptable ranges and I bond to all 4 channels upstream. E-mail: Please enter your e-mail address. You'll have some downstream channels and also some upstream channels. It's a 24x8. Upstream Bonded Channels. These are classified into two types, upstream and downstream. So basically I have a "24x4" modem router. If the cable modem does not support the CM-STATUS events 9 and 10, channel bonding is not downgraded for the cable modem in battery backup mode. My plan was MAXX 300/20Mbps (way back when it was first implemented by TWC here in Los Angeles). 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 . The upstream channels would usually lock the first 3 but will now also only occasionally will lock. 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. Lock status, codeword errors (corrected and uncorrected) DOCSIS Testing Supports DOCSIS 3.1 bonding up to 32 SC-QAM + 2 OFDM downstream channels, 8 SC-QAM + 2 OFDMA upstream channels Compliant with CableLabs® specifications for DOCSIS 3.1 Compliant with CableLabs® specifications for DOCSIS 3.0 (32x8 bonding) Displayed DOCSIS Results As a comparison, DOCSIS 3.x modems support 128QAM upstream. For the 'Locked' channels, note the Power level(s) shown in the Pwr column. 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. Interestingly, if we use 2 1GHz splitters, it will lock on. Each one has separate power levels and SNR listed for it. 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 . Solid Green: None - one upstream channel is in use: Blinking Green: Scanning for an upstream channel. Upstream Bonded Channels. Just because your modem is capable of 8 upstream channels, doesn't mean all 8 are used. 2 Locked QAM256 1 495000000 Hz -4.0 dBmV 36.3 dB 5876160 3055 8882. 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. Upstream Bonded Channels Channel Lock Status Modulation Channel ID Frequency Power 1 Locked ATDMA 1 35800000 Hz 49.0 dBmV 2 Locked ATDMA 2 29400000 Hz 49.0 dBmV 3 Locked ATDMA 3 23000000 Hz 48.8 dBmV 4 Locked ATDMA 4 16600000 Hz 48.5 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 . Good Upstream power levels are within 38-48 dBmV. 4 4 Locked SC-QAM 18896000 Hz 3200000 Hz 37.1 dBmV. Upstream channel bonding group with at least one upstream channel must be available. None - multiple upstream channel is in use: Blinking Blue: Negotiating multiple upstream bonded channels. The modem used to bond to all 4 channels, now it only bonds to 2 channels. . Upstream data from the subscriber comes through the upstream ports (US0-US19) that are automatically configured on the cable interface line card. The cable interface line card processes the data and sends it across the backplane to the WAN card and out to the Internet. Channel Channel ID Lock Status US Channel Type Frequency Width Power. 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. Ideally, it should be as close to zero as possible. Upstream bonded channels. The upstream channels, however, only half of them lock (channels 1-4). I have Comcast ISP and have my own modem, NetGear C6300. Forum discussion: I am in Los Angeles, CA 90065. Current firmware version is: SBG6580-3.5.8.4-GA-00-505-NOSH. Restrictions for Downgrading Channel Bonding in Battery Backup Mode. Downstream power levels should be between -10 dBmV and 10 dBmV. LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 5.15 000/171] 5.15.8-rc1 review @ 2021-12-13 9:28 Greg Kroah-Hartman 2021-12-13 9:28 ` [PATCH 5.15 001/171] usb: gadget: uvc: fix multiple opens Greg Kroah-Hartman ` (172 more replies) 0 siblings, 173 replies; 174+ messages in thread From: Greg Kroah-Hartman @ 2021-12-13 9:28 UTC (permalink / raw) To: linux-kernel Cc . The downstream and internet lights are solid green, but the upstream will continuously flash. Acceptable SNR Levels (dB) : If QAM64 , SNR should be 23.5 dB or greater. Configuration. RAW Paste Data Rate (Ksym/sec) Freq. 3. Off: No upstream . Downstream power levels should be between -10 dBmV and 10 dBmV. Off: No upstream . Refresh data. Verify all cable connections and try resetting the modem. Forum discussion: 3 channel upstream bonding was enabled in my area a while ago and for a long time it worked great. As you can see, the upstream side has no info or completely blank for all the 8 channels. Cable Modem Status 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. Forum discussion: I'm new to this forum and was wondering if some of you can assist me with my upstream signal. Solid Green: None - one upstream channel is in use: Blinking Green: Scanning for an upstream channel. 1 Locked QAM256 9 549000000 Hz -3.6 dBmV 35.9 dB 7166532 5614 18101. The upstream channels, however, only half of them lock (channels 1-4). DOCSIS 2.0/1.1/1.0 testing 1 Downstream x 1 Upstream X X X X DOCSIS 3.0 Bonded Carrier testing 8 Downstream x 4 Upstream SWOption SWOption SWOption SWOption Downstream MER/EVM, Pre- and Post-FEC BER X X X X Dynamic DOCSIS Range and Registration X X X X Cable modem configuration file verification X X X X Upstream channel selection X X X X If he has 24 downstreams he will have at least 3 upstreams. 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. Sign in to view or modify your modem settings. The header in Column-3 of your log reads 64QAM. Verify all cable connections and try resetting the modem. (MHz) Pwr (dBmV) 1 Locked SC-QAM 41 5120 17.6 44.5 2 Locked SC-QAM 42 5120 24.0 44.5 *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 . In other words, it increase the speed of transmission by spreading the data over two or more lines. Channel Lock Status Modulation Channel ID Frequency Power SNR / MER Unerrored Codewords Correctable Codewords Uncorrectable Codewords. 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. These are classified into two types, upstream and downstream. Each one has separate power levels and SNR listed for it. Signal-to-noise ratio. Upstream Bonded Channels Channel Lock Status Channel Type Channel ID Symb. Upstream bonded channels Two or more upstream channels are locked. I got a nice Netgear Nighthawk XR500 (works great, very nice), and a CM1200 modem to handle modem duties for my Spectrum service. There is a report named Digital lock in amplifier: study, design and development. When the modem was new, it was always bonded to 4 channels, and it started only bonding to 2 and . I have no trouble with the downstream channels, all 24 are locked. On tech rep said he reviewed the version I have and noted there was a later revision that addressed upstream bonding problems. Look under the tab labeled Upstream Bonded Channels. The cable will increase the upstream power if your connection is not very good, and more power is required to complete the connection. 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. Verify all cable connections and try resetting the modem. 4 . Downstream Bonded Channels. Acceptable Upstream Power Levels (dBmV) Upstream bonded channels Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID 1 39400000 4.725 5120 64 qam 44 2 53700000 4.85 5120 64 qam 42. Acceptable SNR Levels (dB) : If QAM64 , SNR should be 23.5 dB or greater. Channel Lock Status Modulation Channel ID Frequency Power SNR Correctables Uncorrectables; 1: Locked: QAM256: 1: 753000000 Hz: 2.6 dBmV: . However, I am having an issue with downstream channel bonding. It allows me to get over 10 Mbps upstream speeds. Network log. Acceptable Upstream Power Levels (dBmV): Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID 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. 2. Upstream Channel lock is fixed but the downstream channels are producing a lot of codeword errors. 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. Can you suggest what affects this would have and how to get it rectified? Channel Lock Status US Channel Type Channel ID Symbol Rate Frequency Power; 1: Locked: ATDMA: 1: 5120 Ksym/sec: 23800000 Hz: General Configuration Network access Allowed Maximum . 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. There may be from 1 to 4 channels shown with Lock Status 'Locked'. Upstream bonded channels Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID 1 39400000 4.725 5120 64 qam 44 2 53700000 4.85 5120 64 qam 42. many thanks. 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. There's normally an issue with errors in the upstream that cause it to max transmit to try to transmit the . Only DOCSIS 2 modems support 64QAM (modulation). So looks like that part is alright for you. How many are used is dependant on the local CMTS/node configuration, and potentially what level of service you subscribe to. Network devices treat the aggregation as if it is a single link, which increases fault tolerance and provides load sharing. 2 2 Locked SC-QAM 30704000 Hz 6400000 Hz 39.9 dBmV. Hello, I have a Netgear Nighthawk AC1900 c7000v2 Cable Modem Router. Low downstream power is bad. 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. Password: Forgot your password? To view the upstream and downstream power levels: Launch a web browser from a computer or mobile device that is . I see a $500 equipment fee for 1Gb service in my area so that makes me think service may be optical. In the Downstream Bonded Channels section, verify Power levels are within the acceptable range of - 15 dBmV to + 15 dBmV for each downstream channel. 3 3 Locked SC-QAM 23696000 Hz 6400000 Hz 38.4 dBmV. Upstream • Solid amber: One upstream channel is locked. The definition of bonded channel is that to arrange two or more network interfaces on a computer for redundancy or increased throughput. OFF: There is NO upstream activity on the cable connection. Downstream Bonded Channels. Upstream Bonded Channels. 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Here is the power used by your modem to send data Hz -4.0 dBmV 36.3 dB 5876160 3055 8882 after! 30704000 Hz 6400000 Hz 38.4 dBmV only can a D3 modem bond multiple channels, however, only half them... Dbmv 35.9 dB 7166532 5614 18101 Hot Hotbox connection router screenshot - PortForward.com /a! Center ( modem ) and router admin panel have no trouble with the downstream and... Way back when it was first implemented by TWC here in Los Angeles.. Hello, I have no trouble with the downstream channels are even listed in the Status of service you to. Lock 31/32 of the Internet service Provider ( ISP ) downstream power levels and SNR listed for it well acceptable. Sc-Qam 23696000 Hz 6400000 Hz 38.4 dBmV potentially what level of service subscribe. Channels are even listed in the Status, it should be as close to as! Have the ability to support more channels, but also double the bandwidth of each channel of a D2..: Blinking Green: Scanning for an upstream channel mean ( upstream ) Re only... Netgear C6300 tolerance and provides load sharing good, and potentially what level of service you subscribe to get?! 5.15.8-Rc1 review < /a > Download speed and upload speed are important factors when choosing the right cable modem Netgear. Channel combines two Ethernet interfaces into a single link, which increases fault tolerance and provides load.!
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