Are the two antennas of e5573-856 receiving or transmitting?

Receiving and sending coexist at the same time.

At present, the mainstream router main chip only supports two antennas, but the two antennas must be equipped with amplifier circuits and power amplifier chips respectively, so that the same antenna group can be used to send and receive network signals at the same time.

Huawei's accompanying WiFiE5573s-856 is also equipped with a short message function: it can edit and send and receive short messages anytime and anywhere, support long short message sending and receiving, store up to 500 short messages, and of course, have a new message reminder function.