IDS-5642-WG is an innovative security 4 ports RS232/422/485 to 802.11b/g WLAN and 2 ports LAN device server and IDS-5642-IWG with 4 ports isolated RS422/485. Users are able to configure the device server by DS-Tool via LAN port or WLAN interface, but not simultaneously. Once LAN port is activated, WLAN interface will enter standby mode to minimize power consumption. IDS-5642-WG / IDS-5642-IWG offers many powerful features for HW & SW redundant functions. When the connection between master-link and LAN fails, IDS-5642-WG/IDS-5642-IWG can automatically switch to another LAN port within 10mS, and still guarantees a non-stop connection. IDS-5642-WG/IDS-5642-IWG also supports switch mode; users can use Daisy Chain to reduce the usage of Ethernet switch ports. Secondly, IDS-5642-WG/IDS-5642-IWG can simultaneously transfer SSL encryption data into 5 host PCs. This feature can assure all critical data that saved in different host PCs to avoid Ethernet break or host PCs failure. Thirdly, IDS-5642-WG /IDS-5642-IWG provides dual redundant power inputs on terminal block. IDS-5642-WG /IDS-5642-IWG also provides NAT pass through function so that users are able to manage IDS-5642-WG /IDS-5642-IWG inside or outside the NAT router. It is easy for different IP domain users to use IDS-5642-WG /IDS-5642-IWG. Therefore, IDS-5642-WG/IDS-5642-IWG is one of the best security communication solution for wireless application of quad-port serial devices.