%0 Journal Article %A Artalejo Rodríguez, Jesús Manuel %T A queueing system with returning customers and waiting line %D 1995 %@ 0167-6377 %U https://hdl.handle.net/20.500.14352/57502 %X We consider a queueing system where a customer who finds all channels busy must decide either to join the queue or to retry after an exponentially distributed time. The performance of the system can be approximated by using the RTA approximation introduced by Wolff and Greenberg. We present numerical results demonstrating the performance of the approximation for various representative cases. %~