We provide technical training for the administration, installation and maintenance of large telephone systems.
Although the company specializes in telephony training, I would like the logo to focus on telephony and not training.
My initial thoughts were that maybe a telephone keypad or a rotary dial might work well as part of a logo. It would also be possible to use the technical symbol dB to represent Decibel.
Our target audience is very small and the logo (when used on my website) will mostly be seen by people who are personally directed there by myself for further details on our services.