• Obstruction of the router antenna view of the cellular base station tower by Ethernet cables, power
cables, USB cables, and walls.
• Possible coupling of digital noise from inside the router to the antenna when unshielded Ethernet
cables are used.
• Keep antennas away from electrical and signal cable clutter. Metal conductors inside cables may block
antenna view of the base station. Additionally, unshielded (and even shielded cables in some cases) may
radiate signals that interfere with RF signal reception.
• We recommend that your orient cellular antennas vertically to ensure polarization match. While
polarization of the signal may change as it is reflected from obstructions, when the view is unobstructed,
vertical polarization is optimal.
Supported Cisco Antennas and Cables
The following table shows the antennas and Cables that are available for IG21R and IG31R gateways.
Table 3: Supported Antennas and Accessories
Description
SKU
Cellular antenna, swivel mount 4G LTE advanced
dipole
IG-LTE-SMA-D
Wi-Fi antenna, swivel mount dipole, 2dBi @ 2.4GHz,
RP-SMA (plug)
IG-WIFI-SMA-D
GPS antenna, 1575.42 ± 1 MHz, 17 ft. (5 m)
integrated cable, SMA(m)
IG-GPS-SMA
SMA(m) to TNC(f) adapter
LTE-ADPT-SM-TF
Antenna cable, 10 ft (3 m) LMR-195, SMA(m) to
SMA(f)
CAB-L195-10-SM-SF
Antenna cable, 20 ft (6 m) LMR-240, SMA(m) to
SMA(f)
CAB-L240-20-SM-SF
Selecting and Installing Antennas
Cisco IG21 IoT Gateways, Cisco IG21R Rugged IoT Gateways, and Cisco IG31R Rugged IoT Gateways Hardware Installation Guide
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Selecting and Installing Antennas
Supported Cisco Antennas and Cables
