The timestamps displayed in the components accessible from the EMnify User Interface (EUI) and API depends on the information shared by the network and the local time shared by the user's browser (HTTP requests).
UTC time is displayed on:
- Diagnostics info in the endpoint's view.
- Data usage charts in the dashboard and endpoint view.
- CDR Export, on the Data Analytics section.
Local time (e.g. Berlin UTC+2):
- Organization-wide events in the dashboard - also accessible through the bell icon, upper right corner.
- Connectivity events in the endpoint and SIM view.
- SMS history in the endpoint view.
Additional info: device time sync
A device syncs its internal clock as described below, unrelated to the way the SIM's connection and data events are shown by EMnify.
- Option 1: NITZ (Network Identity and Time Zone)
- This is an optional part of the GSM specification, here the radio network is broadcasting the time on the signaling channel (no PDP context is required). The disadvantage is that this is supported only on a limited number of networks and not controlled by EMnify.
- Option 2: NTP (Network Time Protocol)
- This requires a PDP context and works like network synchronization on any device connected to the internet, the time is retrieved from NTP servers. No difference for 2G/3G/4G.