User guide

Introduction to the AirLink GX440
Rev 1.0 Jan.12 15
If you need to contact your AirLink GX440, a device connected to the AirLink
GX440, or a host system using the AirLink GX440 from the Internet, you need to
have a known IP (such as one which is static) or domain name (an IP address
converted by a DNS server into a word based name). If you have a dynamic IP
address for your device, you can use a Dynamic DNS service (such as IP
Manager) to translate your IP address into to a domain name.
Caution: To connect remotely to your AirLink GX440 using TCP/IP, the IP address given
to your device by Verizon cannot be a private or internal IP address (e.g., a special private
network) unless you are on the same network or inside that network’s firewall (such as with
frame relay).
LTE
LTE (Long Term Evolution) is the predominant 4th-generation wireless standard
world-wide. The 3GPP Release 8 specification outlines the features and
requirements. Key features include:
• Peak data rate -
· 50 Mbps DL (MIMO)
· 25 Mbps UL (SISO)
• Up to 200 active users in a cell (5 MHz)
• Less than 5 ms user-plane latency
• Supported bandwidths -
· 5 MHz
· 10 MHz
• Enhanced support for end-to-end QOS
• Physical layer uses -
· DL: OFDMA (Orthogonal Frequency Division Multiplexing Access);
Modulation: QPSK, 16QAM and 64QAM
· UL: Single Carrier FDMA (Single carrier Modulation and Orthogonal
Frequency Multiplexing);
Modulation: QPSK, 16QAM
• MIMO (Multi-Input Multi-Output)
CDMA (Code Division Multiple Access) provides backward compatibility and
seamless connections. The AirLink GX440 will fall back to 1x or EV-DO when LTE
is not available.
EV-DO revision A is an enhancement on the original revision 0 adding expanded
upload capabilities and a more robust connection overall. In addition to increasing
the downlink speed, revision A increases the uplink speed, is backwards
compatible, and automatically connects with existing and broadly deployed
EV-DO Rev. 0 and 1x networks ensuring reliable and pervasive connectivity.