The term 'Call Queue' refers to a system used in customer service, where customers are placed in a queue and served in the order they called. The crossword solutions for this term are CABS (4 letters), NEXT (4 letters), LINE (4 letters), and WAITER (6 letters). CABS stands for Customer Automated Call Back System, which is an automated system that calls customers back in the order they called. NEXT is the NEXT customer in LINE, who will be served after the current customer. LINE is the queue of customers waiting to be served. WAITER is the customer service representative who serves the customers in the queue.