When should you deploy an external AP antenna indoors?

External AP antennas are deployed indoors when they are necessary to achieve the desired wireless coverage and performance. This is often the case in environments with unusual shapes, high ceilings, or specific coverage requirements that cannot be met by integrated antennas. For example, a directional antenna might be used to cover a long hallway, or an omnidirectional antenna with a specific gain pattern might be chosen for an open office space. The choice is driven by the coverage needs, not by the AP deployment model (Mobility Express) or specific frequency band (2.4 GHz or 5 GHz). While some external antennas are band-specific, the decision to use an external antenna itself is based on coverage requirements.