Digi W R 2 1 - Manual (Page 9)

Digi TransPort® WR21 Installation Guide
Page 9
3 Installation
Mounting Tips
The Digi TransPort WR21 should be positioned on a flat, level surface or via a wall-mount, rackmount, or DIN
rail mounting brackets (see the Accessories section on page 18 for all options). The unit is designed for indoor
use and should be mounted in a location with adequate ventilation. Also, do not expose the unit to extremes
of heat or cold, strong magnetic fields, or liquids.
Step 1) (SIM card models only) - Install the SIM card(s): SIM card(s) should be inserted into SIM Sockets
as illustrated in the above Front View image. For SIM 1, the contacts should be face down. For SIM 2, the
contacts should be face up. In both cases, the end of the SIM card with the chamfered corner should be
inserted first.
The Digi TransPort WR21 also allows for dual network installations where one wireless service can be used
as a back-up in the event that the primary service fails. These installations cannot be used to access two
networks simultaneously. By default, SIM 1 is used for access to the primary network and SIM 2 is used for
the back-up network.