Robustel R5020 User Guide
RT_UG_R5020_v.1.0.2 Mar. 17, 2023 141/167
Chapter 5 Configuration Examples
4.7 Cellular
4.7.1 Cellular Dial-Up
This section shows you how to configure the primary and backup SIM card for Cellular Dial-up. Connect the router
correctly and insert two SIM, then open the configuration page. Under the homepage menu, click Interface > Link
Manager > Link Manager > General Settings, choose “WWAN1” as the primary link and “WWAN2” as the backup
link, and set “Cold Backup” as the backup mode, then click “Submit”.
Note: All data will be transferred via WWAN1 when choose WWAN1 as the primary link and set backup mode as cold
backup. At the same time, WWAN2 is always offline as a backup link. All data transmission will be switched to
WWAN2 when the WWAN1 is disconnected.
Click the edit button of WWAN1 to set its parameters according to the current ISP.
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