I'm working on a service quality monitoring dashboard for my employer. The site diplays QoS parameters for hundreds of different telecommunications services provided by the company: messaging, voice calls, internet connection, television, websites, mobile applications etc.
For the site I need an icon, which denotes a telecommunications service of any type, that is, which can be used for any of the above listed services. I currently use a cogwheel icon (mdi-cog-outline), but I'd like to use something more telecom-related. Any ideas?