A traffic engineering model that, like Erlang B, assumes that an offered call is cleared immediately, with no queuing. However, Extended Erlang B assumes that the caller encountering blockage (e.g., busy signal or no dial tone) will hang up and immediately attempt the call again, with no overflowing of calls to more expensive routes. EEB was developed by Jim Jewitt and Jaqueline Shrago of Telco Research. See also Erlang, Erlang B, Erlang C, Equivalent Queue Extended Erlang B, GoS, Poisson distribution, traffic, and traffic engineering.