Turkey 1200 ATM backup WAN project

Installed at over 1200 ATM sites in Turkey. Robust connectivity service is necessary for all ATM site IDG500 built-in 1 LTE Cellular module and 2 SIMs to make the connection always-on as a reliable back up WAN for ATM project

Requirement: LTE connectivity with 2 SIMs as failover, GRE over IPSEC.