Figure 7 Filler Panel - Nokia 50i Installation Manual

3. Slide one or two gateways into the shell openings.

Figure 7 Filler Panel

Nokia 50i Installation Guide
If you are installing only one gateway into the shell, cover the empty
opening with a filler panel, which you secure with a single screw.
Note
Filler panels are shipping with the shell if you order it separately. If
you do not have a filler panel available and need one, contact your
Nokia sales representative.
Filler panel
Installing the Nokia 50i Gateway
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