B. Fill in the server information and enable this server.
Note:When you select anyone of TTN or Chirpstack, other servers are not allow to enable.
C. Go to "Packet Forwarder" → "Radio" page to configure antenna transmission type, center
frequency and channels. The channels of the gateway and network server need to be the
same.
Note: for built-in antenna models, please select "2 × Built-in ANT"; for external antenna
models, please select "Ext ANT(TX+RX)+ Built-in ANT(RX)".