Define erlang, the measurement unit used in telecommunications traffic engineering. Discuss traffic engineering approaches of traditional voice phone networks and VoIP systems

Answer:The erlang is a unit of traffic density in a telecommunications system. One erlang is the equivalent of one call (including call attempts and holding time) in a specific channel for 3600 seconds in an hour ... The hundred or centum call second or CCS is the equivalent of one call for 100 seconds out of an hour.