Setting up an LTE modem
Didactum's web-based monitoring systems can optionally be equipped with an internal LTE modem. Use this modem to access the high-performance LTE data network and provided internet services such as VPN, SMTP or FTP.
| # | LTE Setting | Description |
|---|---|---|
| 1 | Enable LTE modem | Activation / deactivation of the built-in LTE modem |
| 2 | APN | Provider's Access Point Name e.g. "internet.telekom" |
| 3 | PIN | PIN code (if required) |
| 4 | User Name | Username for provider authentication |
| 5 | Password | User password for provider authentication |
| 6 | Enable routing for internal network | ·Allow devices in the internal network to use this connection as gateway for internet access ·(only 600 and 700 monitoring systems) |
| 7 | Enable Watchdog | Use of watchdog / ping function to check connection |
| 8 | Watchdog period | Ping frequency of watchdog in seconds |
| 7 | Watchdog timeout | Watchdog timeout / connection considered interrupted |
| 8 | IP Address or hostname of ping destination | IP address for checking LTE connection |
LTE-Failover
By default, the LTE modem operates in failover mode. This means the LTE connection is automatically established if no response is received from the DNS servers specified in the "Network" settings (ICMP ping via the Ethernet interface). The LTE connection in failover mode is terminated once access to one of the DNS servers is restored via the Ethernet interface of the IP-based measurement and monitoring system. Therefore, for a normal failover to occur, the DNS server must be located outside the local network.
Permanent LTE connection
If permanent internet access is required, use the built-in OpenVPN client of your IP-based Didactum IT monitoring system. The connection to the VPN server is maintained when the connection is established via Ethernet or LTE (even if the internet connection via the Ethernet interface is interrupted). This ensures permanent access to the protected private network and the device's permanent IP address (with the appropriate VPN server settings).
Restoring LTE connection
The Didactum IT monitoring system's built-in watchdog ping function can automatically re-establish the LTE connection. The timeout should be set at least three times longer than the ping period. If no successful ping to the specified address is received during the timeout period, the connection is considered interrupted. The IT monitoring system will then automatically establish a new LTE connection via its built-in modem.
Access Point Name (APN)
If the SIM card installed in the Didactum LTE modem supports a personal APN (Access Point Name) with a static IP address, the IP thermo-hygrometer, power distribution unit (PDU), or rack monitoring system can be accessed directly via this IP address. To obtain this SIM card with an APN, simply contact your mobile network provider.
Note: You can find your LTE modem's IP address, provided it has been assigned in the LTE IP address field, in the German web interface under "System Settings" ("Preferences") => "Network".
Overview of some Access Point Names of leading mobile network operators:
| Provider | APN | Username | Password |
| Telekom | internet.telekom or internet.v6.telekom | telekom | tm |
| Congstar | internet.telekom | congstar | cs |
| O2 | internet | not required | not required |
| Sipgate | internet | sipgate | sipgate |
| Vodafone | web.vodafone.de | not required | not required |