When we talk about “cee” or “eceee” in relation to radio frequency channels, especially in the context of MikroTik devices or other wireless network equipment, these letters are describing the configuration of the subbands of a channel in terms of their utilization. of Dynamic Frequency Selection (DFS).

DFS is a mechanism used in radio frequency bands, particularly in the 5 GHz band for Wi-Fi, which allows devices to detect and avoid interfering with existing systems such as radar. When a device finds that a radar is using one frequency, it must switch to another to avoid interference.

Explanation of “cee” and “eceee”:

1. cee or eceee: These letters are simplified representations that indicate which parts of a frequency band are regulated by DFS. In many router or access point configurations, you can find channel configurations where a graphic or list that includes these characters is displayed.
   • c: Generally means that the channel is clean or free of DFS requirements. This means that the channel can be used without the need to implement DFS to avoid interfering with radars.
   • e: Indicates that the channel is regulated by DFS and that the device must employ DFS detection to use that channel. Essentially, if a radar operating on that frequency is detected, the device must automatically switch to another channel.

Where are these designations seen?

In network device management software, especially those that handle Wi-Fi networks in the 5 GHz band, you can find these designations when you configure operating channels. These indications help network administrators choose channels that minimize the likelihood of interference with radar services and other devices operating in the same band.

Considerations when choosing channels:

• Local Regulations: Depending on your geographic location, regulations on which channels require DFS may vary. It is important to review local telecommunications regulations to ensure you comply with all relevant regulations.
• Network Planning: Choosing channels that do not require DFS can allow for more stable network usage without interruptions, but may be more subject to congestion if many nearby devices also choose non-DFS channels.

This configuration is crucial to ensure that Wi-Fi devices safely and effectively coexist with other services using the same frequency bands, particularly in environments where spectrum space is heavily used or regulated.