ZyXEL LTE5121 User Guide - Page 18
Table 1, Color, Status, Description - communications
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Chapter 1 Introduction Table 1 LED Descriptions (continued) LED LTE/3G COLOR Green SIGNAL STRENGTH Orange Off Green STATUS On Blinking On On DESCRIPTION The LTE connection is registered and authenticated. The LTE Device is initializing the LTE connection. The LTE Device has a 3G WAN connection. The LTE module is not present or has failed. The LTE LEDs display the signal quality of the LTE connection based on the Received Signal Strength Indication (RSSI). Three bars LED - best signal quality (-70 dBm or greater). Two bars LED - medium signal quality (-90 dBm to -70 dBm). INTERNET Green All Signal LEDs Off On One bar LED - low signal quality (less than -90 dBm). There is no LTE connection. The LTE Device has an IP connection but no traffic. Blinking Your device has a WAN IP address (either static or assigned by a DHCP server). The LTE Device is sending or receiving IP traffic. Red ETHERNET 1-4 Green (Giga Ethernet) Orange (Fast Ethernet) POWER Off Green WLAN Red Off Green Blue Off Off On On Blinking On Blinking On Blinking On On Blinking Blinking The LTE Device does not have an IP connection. The LTE Device attempted to make an IP connection but failed. The LTE Device has a successful 1000 Mbps Ethernet connection with a device on the Local Area Network (LAN). The LTE Device is sending or receiving data to/from the LAN at 1000 Mbps. The LTE Device has a successful 10/100 Mbps Ethernet connection with a device on the Local Area Network (LAN). The LTE Device is sending or receiving data to/from the LAN at 10/100 Mbps. The LTE Device does not have an Ethernet connection with the LAN. The LTE Device is receiving power and ready for use. The LTE Device is self-testing. The LTE Device detected an error while self-testing, or there is a device malfunction. The LTE Device is not receiving power. The wireless network is activated and is operating in IEEE 802.11 "b", "g" or "n" mode. The LTE Device is communicating with other wireless clients. The LTE Device is setting up a WPS connection. The wireless network is not activated. Refer to the Quick Start Guide for information on hardware connections. 18 LTE-5121 User's Guide