Before revision:  The system stability condition and probability generating functions  of the number of calls in orbit and system are derived and evaluated numerically in the context of mean system size, server availability, failure frequency , and orbit waiting time.
After revision:  The system stability condition and probability generating functions for the joint queue length distribution of the number of calls in orbit and system are derived and evaluated numerically in the context of mean system size, server availability, failure frequency , and orbit waiting time.