What are downstream and upstream channels on a modem?

Cable modems have upstream and downstream channels. These channels are how a modem processes data from your Internet service provider (ISP). The upstream channels and downstream channels are how you are able to upload and download content via Internet or WiFi connections.

What does 16×4 modem channels mean?

Originally, DOCSIS used one channel for downloading data and one channel for uploads. For example, 8×4 modems—that is, modems with eight downstream channels and four upstream channels—support a theoretical maximum of 343Mbps. A 16×4 modem generally tops out at around 680Mbps for downloads.

How many upstream channels should I have?

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 do your readings mean (Upstream)?

Upstream Channels Locked	Power Limits (dBmV)
1 2 to 4	35 to 57 35 to 54

How many channels should my modem have?

Any new modem you buy should have at least 16 downstream channels; anything less is probably either old or underpowered.

What does 16 downstream channels mean?

The higher the number of Downstream channels the higher the Internet download speed supported. At a minimum, you should choose modems with at least 16 Downstream Channels. The number of Downstream channels is directly correlated with the ISP speed plan that the modem can support.

Do modem channels matter?

The more channels there are, the faster the speed of the modem in each category. Compare the DOCSIS tier and channel numbers with the download and upload speeds of your plan. You’ll want to make sure your modem is fast enough to get the most out of your internet plan.

What does downstream and upstream mean internet?

Many internet plans have different “downstream” and “upstream” speeds. Downstream is data that is download from the internet to your device. Upstream is data that is uploaded from your device to the Internet. You may check your effective bandwidth at Speedtest.net or Fast.com (it can be helpful to compare the two).

What are good upstream and downstream levels?

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. Good Downstream power levels are within -7 to +7 dBmV. Good Upstream power levels are within 38-48 dBmV.

What is an upstream channel on a modem?

Upstream channels are also known as “upload speed.” This refers to the data that your computer sends out to the Internet. Your cable modem’s upload speed (or upstream channel) determines how much bandwidth of data your computer can send out to the Internet each second at full speed.

What is upstream bonded channels?

Like downstream channel bonding, upstream bonding consists of two or more channels active as an Upstream Bonding Group (UBG). In order to enable multiple upstream channels in a cable modem, a special mode is turned on in the cable called Multiple Transmit Channel mode (MTC mode).

What is an upstream router?

Upstream is not a type of router, it is referring to the location of the router in relationship to the network. For example if someone refers to your ISPs upstream router they are referring to the router one hop up from your router at your ISP.

What do channels mean on a modem?

Channel numbers are often listed as a number showing how many channels are dedicated to downloading versus uploading. For example, “8×4” means that the modem has eight downstream channels and four upstream channels. The more channels there are, the faster the speed of the modem in each category.