When cable is a common channel, devices switch roles so everyone gets a fair share of bandwidth.
When cable is a common channel, devices switch roles so everyone gets a fair share of bandwidth.
Each user node links to a multiplexer or employs a method such as CSMA/CD.
The CMTS device allocates channels to each modem using FDMA. These channels are also shared with other modems, though not all other devices on the CMTS. It’s unclear from my perspective whether they employ TDMA, CSMA/CD, or another method for managing time sharing.
In an apartment setting there is typically one CMTS per property—this might refer to a single building or an entire complex. For neighborhoods, there can be hundreds of houses under one CMTS, while a single CMTS can support multiple coax connections. Each connection can house dozens or even hundreds of modems. They don’t interfere with each other due to frequency and time division as previously explained. Physically, the CMTS could be located in a basement, on the side of a building, inside a main apartment building, or near other neighborhood infrastructure such as power distribution centers, storm shelters, or sewage pumping stations.