Antenna 
connector door.
To detach the accessory antenna
1.Hold the accessory antenna at the base, where it is plugged in to the PC300.
2.Gently pull the antenna plug away from the PC300 antenna connector.
3.Close the antenna connector door.
4.Store your accessory antenna carefully in the protective case provided with your PC300.
Note:
Use of an external antenna is not needed when used in areas where normal GSM or UMTS network signal strength is available.
To store the accessory antenna
1.Open the antenna cover by gently applying pressure in the direction of the arrow, away from the case.
2.Insert the antenna as shown.
3.Replace the antenna cover.
4Overview