What are the precautions in the process of using the WLAN Survey PAD survey tool for the pre-sales network? (Multiple choice)
A . There must be an engineering environment architectural drawing and know the corresponding scale
B . In the tool as much as possible to mark the obstacle information, consistent with the actual environment
C . The customer’s needs must be clear, the actual number need to consider the concurrency rate according to the actual circumstances
D . For some ambiguous information, the need for engineering staff to estimate the relevant information, easy to survey
Answer: ABC