Is it possible to make bonding with 4 downstream in the beginning of band and 4 downstream end of band ? Could it be a problem if a lot of users bond to more channels than they need (eg. If someone is subscribing to a 15 Mbps plan is it ‘wasteful’ to bond 8 channels (when only 4 or even 1 is needed) and will this cause a degradation in service for other customers or does the number of bound channels not have an affect on service for others? A 16x8 cable modem, for example, can deliver 608Mbit/s downstream (16 ch. I only set up one fiber-node with 4 upstreams and 8 downstreams. Downstream Channel Bonding is perhaps the ball bearings of DOCSIS 3.0, enabling subscriber data speeds in excess of 160 Mbps (4 times that of previous DOCSIS versions). We would be glad to work with your cable operator if they contact us directly, however, I am sure they have someone on staff who will resolve your issue. Cable modem cannot register on Secondary Downstream, Does not support legacy cable modems (non-DOCSIS 3.0), Best subscriber data utilization capability. DOCSIS 2.0 & 3.0 specify 6.4 MHz, but can use the earlier, narrower channel widths for backward compatibility. Thanks, Ken. Good Downstream power levels are within -7 to +7 dBmV. But you raise a good point. Which cable operator do you work for? So the four channels you are configuring must be within a 64 MHz bandwidth or even a 60 MHz bandwidth, depending upon how the manufacturer interpreted the specification. North America) or 8 MHz channels ("EuroDOCSIS"). 3) In CATV, a downstream channel is one used to transmit signals from the headend to the user. pl suggest changes to resolve this problem. * 27 Mbit/s). If all downstream channels of the DBG are configured as Primary Downstreams, then DOCSIS 3.0 has another capability to load balance all legacy cable modems across the DBG. That did increase to 9 when the Gateway MAX (Netgear C6300) was first released. Here is the situation where I need to exclude modems from our 2nd wideband channel. In a competitive market, these recommendations are usually taken as “we had better do it to stay in business”, which has been the case. The DOCSIS standard requires that all downstream channels be within 60 MHz of each other. You say that “For 8 bonded channels you could transport 296 Mbps, so an individual subscriber could not use the 296 Mbp”. Alpharetta, GA 30022-8555 Per the DOCSIS 3.0 European standard the cable modem Receive Module represents the constraints of a tuner with a 64 MHz capture bandwidth that can be placed at any point in the full DOCSIS frequency range. We ordered cable trap filters years ago that allowed up to 111mhz through so we can filter cable to houses that don’t want it. It is possible to have 1 mac domain with all 8 DSs as primary and the proper wideband and integrated interfaces. Depending on the IOS version of the 10k you have certain restrictions where you can place the DS frequencies. https://volpefirm.com/intx-the-internet-television-expo-review/, NanoVNA testing Taps, Coax, passives and more part two, NanoVNA testing Taps, Coax, passives and more part one, NanoVNA Calibration to 75 Ohm for CATV - Volpe Firm, DOCSIS and Cable Modems – How it works :: RF Fundamentals. Starting at 100 MHz would increase the time. Same for the 5×20 cards, but I generally recommend the MC20x20 cards over the MC5x20 cards because performance in the MC20x20 cards is far superior over the 5×20 for a number of reasons. If Wi-Fi is the lifeblood of your connected lifestyle, your modem is the heart that keeps it pumping—which makes your modem's compatibility with your broadband service crucial. A MAC domain is a logical sub-component of a Cisco CMTS router and is responsible for implementing all DOCSIS functions on a set of downstream and upstream channels. De theoretische capaciteit van zo'n channel zegt niet veel, geloof ik. Duc. Upstream: DOCSIS 1.0/1.1 specifies channel widths between 200 kHz and 3.2 MHz. Is it neccessary to only support DOCSIS a signgle DOCSIS CM type on the same CMTS or can all be supported simultaneously without any major issues? This will save your modem a lot time in searching for the correct DOCSIS frequency. In most cases they have to be in a 60 MHz bandwidth. Channel bonding simply means that the CMTS knows that there are four or more RF signals within a 60 MHz passband (greater if more than four channels are bound). Pune. So you will need to keep your DOCSIS channels above 111 MHz recommended. The data will still get across the remaining bonded channels just fine, however if the CMTS is doing its job properly. Cable signal levels for all DOCSIS cable modems require to be within the acceptable level for the modem operate properly. What are the acceptable Cable Signal levels for the SB6183 Modem? 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