CHAPTER 4
Antenna Selection and Installation
This section contains the following:
• Overview, on page 39
• Antenna Installation Best Practices , on page 39
• Supported Antennas for the IR1800, on page 41
• Supported Antennas, Extension Bases, and Cables for the IR1800, on page 44
Overview
Before you install the Cisco IR1800 Integrated Services Router on a table, wall, or DIN rail, install the antennas
on the Pluggable Module. It is difficult to install the antennas after the router is installed.
Note
The following section contains information for selecting antennas on the IR1800 router.
The P-LTE-xx or P-LTEA-xx cellular modules have three RF SMA(f) connectors on the Pluggable Module.
Two connectors, Main and Div (diversity) are used to connect to the 4G/LTE modem. The third connector is
used for GNSS. The Diversity port may also be referred to as an Aux connector.
The P-LTEAP18-GL module has four RF SMA(f) connectors. There are two pairs of main and diversity used
to connect to two modems.
Antenna Installation Best Practices
The optimal site location for antennas for 4G routers and cellular modules plays a significant role in determining
overall cellular link performance. Routers located at the farthest coverage points might have 10 to 50 percent
of the bandwidth available compared to routers located closer to the cellular base station tower, away from
obstructions, and with an unobstructed view of the cellular tower.
Because antennas transmit and receive radio signals over the air, the signal propagation and antenna performance
may be adversely affected by the surrounding environment, including physical obstructions. Radio frequency
(RF) interference may also occur between wireless systems located close to each other, especially if the
antennas of these systems are located close to each other. Interference may also occur when the antenna is in
close proximity to cable clutter or other sources of radio interference.
Follow these guidelines to ensure the best possible performance:
Cisco Catalyst IR1800 Rugged Series Router Hardware Installation Guide
39
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