We have a 500v2 release 7, and when the phone system starts to become maxed out on the number of calls its handling, then it's seems as though all new calls that come in, have one path of communication. Ie: customer calls in, employee answers call, store can hear customer fine, customer CANNOT hear store. This continues until several calls are released, then it's back to normal untill next call overload??????...... Help Jim.