Not sure where 50% is pulled from, however, Erlang is currently used in some of Ericsson's flagship telco. products (along with other programming languges). Abo

Not sure where 50% is pulled from, however, Erlang is currently used in some of Ericsson's flagship telco. products (along with other programming languges). About 50% of Ericsson SGSN-MME is written in Erlang (control plane), the rest being C++. Also Erlang is extensively used by the Ericsson RAN products (RBS 6000 family). This is for GSM, WCDMA, and LTE. People sometimes bring into discussion the AXE (AXD301) and how this was the only Ericsson product that used Erlang (I have seen "stillbirth" associated with Erlang due to this), however, this is not true and Ericsson still use Erlang today in a lot of products, both in production and for testing purposes. I believe the main distinction was that AXE was (almost) entirely programmed with Erlang as opposed to the products above which use Erlang for what it shines at and other languages for drivers, etc. All the information above is public information that I have collected from various sources around the web. First source that comes to mind is this: https://www.youtube.com/watch?v=HyiSYHfESX4 https://www.youtube.com/watch?v=HyiSYHfESX4