At Ericsson I learnt about the telecommunication industry and how it all started. Alexander Graham Bell created the first practical Telephone but it all come together when Almon Brown Strowger created the Strowger Switch which was an exchange system to allow communications to happen across vast distances simultaneously.
I also learnt how the old system is still being kept up to date today with internal testing going on, the exploration of 4g ( LTE ) rollout, along with advanced engineering of the telephone masts.