Upstream power level limits depend on the number of upstream channels locked. For some networks, the power limits for 3 to 4 channels are 35 to 51 dBmV. Ideal levels are approximately 40 to 50 dBmV for single channels, 37 to 48 dBmV each for 2 to 4 channels.
What is the channel bonding?
Channel bonding is when a cable modem combines multiple channels to increase the amount of traffic that it can comfortably support. The best example for how channel bonding works is to look at a highway with heavy traffic.
What is a downstream bonded channel?
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).
What does it mean when one upstream channel is locked?
connection issues
No upstream channels is locked. For a locked channel, downstream power level is outside the range of -15 to +15 dBmV. For a locked channel, downstream power level is more than three dB different from any other locked channel’s power level.
What is a good downstream power level?
Good Downstream power levels are within -7 to +7 dBmV. Good Upstream power levels are within 38-48 dBmV. To view the upstream and downstream power levels: Launch a web browser from a computer or mobile device that is connected to your network.
How many upstream channels does Comcast use?
That’s all they offer is 3 to 5 upstream channels.. The upstream power is on the high side and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.
How does channel bonding increase speed?
Channel bonding splits your web traffic at the packet level among multiple internet connections. This means that channel bonding will be effective even for the user trying to stream a large movie because traffic is split at a low level.
What does channel bonding improve?
Channel bonding combines multiple channels—or lanes—to increase the amount of traffic that a modem’s highway can comfortably support.
What is 16×4 channel bonding?
Bonded channels are a part of the DOCSIS standard. On paper, each channel on a DOCSIS 3 modem can deliver 38Mbit/s downstream and 27Mbit/s upstream, after any overhead is taken into account. For example, a 16×4 modem can reach speeds of (16×38 Mbps = 608 Mbps) downlink and (4×27 Mbps = 108 Mbps) uplink throughput.
What is upstream and downstream channel?
Your cable modem communicates with your ISP through channels. These channels are known as upstream and downstream channels. Upstream and downstream channels are what make up your total bandwidth or Internet speed. Essentially, these data sending and receiving channels are how you can upload content or download content.
What is upstream channel?
In computer networking, upstream refers to the direction in which data can be transferred from the client to the server (uploading). This differs greatly from downstream not only in theory and usage, but also in that upstream speeds are usually at a premium.
What is downstream and upstream?
Stream – The moving water in a river is called a stream.
Upstream – If the boat is flowing in the opposite direction to the stream, it is called upstream. In this case, the net speed of the boat is called the upstream speed. Downstream – If the boat is flowing along the direction of the stream, it is called downstream.
How do I increase my upstream power level?
By adding a splitter or choosing a higher loss leg can increase your Upstream signal level. It won’t cause the modem to falsely transmit more power. Doing a “reset” is normally an easy action.
How do I fix my modem upstream?
If you have a modem and an upstream issue, there are a few things you can do to get it to work correctly again. The first thing to try is to close the connection on the modem. Once you have done this, please wait a few minutes and then power cycle the modem by unplugging it from the wall and plugging it back in.
Why is my acquire downstream channel locked?
Acquire Downstream Channel: This should say “Locked”, “OK” or similar. This means your modem found the frequency with which to receive information from the internet. There should always be at least 1 channel acquired with a DOCSIS 1.1 or 2.0 modem.
How many downstream channels do I need?
Any new modem you buy should have at least 16 downstream channels; anything less is probably either old or underpowered.
What should my downstream frequency be?
A common frequency range for downstream channels (or your download speed) is between 54 MHz to as high as 1000 MHz. For upstream channels (or your upload speeds) the range is 5 MHz to 42 MHz.
Can SNR be too high?
yes, high signal levels can be as bad as low.
