LTE USB dongle has 2 antenna interfaces (port model: CRC9): a main antenna port and an
auxiliary antenna port.
It is delivered with 2 pieces of 4G glue rod antennas as a standard installation.
If the Dongle is installed in the distribution cabinet, users
can also install extension antennas with CRC9 interface to
make sure the antennas are located outside of the distri-
bution cabinet to ensure proper communication.
Extension antenna with CRC9 interface is a common arti-
cle and can be purchased in electrical store.
Antennas of LTE USB Dongle
APsystems China
Rm. B305 No.188, Tomson Center, Zhangyang Road, Pudong, Shanghai , China ｜+86 21 33928205
Priority order of internet connection and switching mode is：
Ethernet, then Wi-Fi, then 4G.
The ECU scans and updates the connection according to this order every 5mins. As an example:
if the ECU is using Wi-Fi or 4G, after plugging the Ethernet cable, it will turn to Ethernet connec-
tion within 5mins.
4. Priority order of Internet connection
4G antenna (standard)
4G main antenna
port：CRC9
Outside diameters: 2mm
4G auxiliary antenna
port：CRC9
Outside diameters :2mm
Note: LTE USB dongle must always be equipped with the main antenna.
Extension antenna（CRC9 ）
