43 
Interface standard 
•  TNC: LTE, UMTS, HSPA+, CDMA 1x, EVDO Release 0 & A, Quad-band EDGE, 
GPRS, and GSM. 
•  SMA: GPS. 
•  Mini USB Type AB: Support for USB devices. 
Cable type 
•  TNC: None 
•  SMA: Flexible 174 sized cable 
•  Mini USB Type AB: USB console cable 
Services 
•  LTE. 
•  UMTS. 
•  HSPA+. 
•  Quad-band EDGE. 
•  GPRS. 
•  GSM. 
•  GPS. 
 
Interface LEDs 
Figure 44 SIC-4G-LTE-G (JG744A) panel 
 
 
Table 68 LED description 
WWAN 
•  Steady green: A link is present. 
•  Flashing green fast: Data is being transmitted or received. 
•  Flashing green slowly: The module is searching for 4G WLANs. 
•  Off: No link is present. 
RSSI 
•  Steady green: Strong signal strength. The RSSI is equal to or greater than 
–69 dBm. 
•  Flashing green fast: Middle- or low-level signal strength. The RSSI is equal 
to or greater than –89 dBm and less than –69 dBm. 
•  Flashing green slowly: Low signal strength. The RSSI is equal to or greater 
than –99 dBm and less than –89d Bm. 
•  Off: Weak or no signal strength. The RSSI is less than –99 dBm. 
HSPA+ 
•  Steady green: The HSPA+ or HSDPA service is valid. 
•  Off: The HSPA+ or HSDPA service is not available. 
LTE 
•  Steady green: The LTE service is valid. 
•  Off: The LTE service is not available. 
GPS 
•  Steady green: The GPS service is valid. 
•  Off: The GPS service is not available. 
 
Connecting the antenna and interface cables 
For more information about connecting antennas and interface cables for the interface module, see 
"4G interface."