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Re:2.8M Simultaneous Connections /w Erlang [slides] by Josh2600hz on Wednesday August 22, 2012 @09:48PM (#4420506)
Our stack uses a ton of Erlang. If you have many simultaneous connections, it's one of the few languages that doesn't lose potency as it scales.

Http://2600hz.com check it out if you have some time :).