Surge protection is required.
and other point
The following table lists the basic principles for selecting APs and antennas.
Table 1 Basic principles
No.
Factor for Consideration
Description
1
Usage scenario and purpose
- Indoor scenarios: Use indoor APs and antennas to provide signal coverage.
- Outdoor scenarios: Use outdoor APs and antennas with a high Ingress Protection (IP) grade and certain surge protection capability to provide signal coverage and bridge backhaul.
- Rail transportation scenarios:
- Train-ground communication: Use outdoor APs and antennas with a high IP grade and certain anti-vibration capability.
- Compartment coverage: Use indoor APs and antennas with certain anti-vibration capability to provide signal coverage.
- Station platform coverage: Use the same APs as those in common outdoor and indoor scenarios.
2
Local standards and regulations
The transmit power and maximum gain of antennas must strictly comply with local standards and regulations. For the rail transportation scenarios, the performance, environment adaptability, and anti-vibration capability of the antennas must also confirm to requirements of the related railway authorities.
3
Mapping between APs and antennas
For details, see the section "Antenna Selection Policy" in WLAN Planning Quick Start.
4
Coverage/Backhaul area and distance
- Coverage: Directional antennas are recommended for long and narrow areas, while omnidirectional antennas are recommended for round and square areas.
- Backhaul: Directional antennas are usually used. If the backhaul distance is long, high-gain antennas should be used; if the backhaul target is concentrated, small-angle antennas should be used.
5
Transmission frequency for radio signals
- Coverage: To implement 2.4 and 5G signal coverage, use 2.4G and 5G antennas separately in the same area or use dual-band antennas.
- Backhaul: 2.4G antennas are not used for backhaul.
6
Construction cost and simplicity
An external directional antenna usually has a large size and needs to be connected to the AP's radio interface through a feeder cable. Compared to a built-in antenna and whip antenna directly installed on an AP, installing an external directional antenna requires higher construction cost and may affect indoor simplicity. To further simplify cable layout (especially in coverage scenarios) without compromising signal quality, you are advised to use built-in or whip antennas directly installed on APs.
Select AP models and antennas based on the onsite environment and customer requirements.
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