This paper introduces the concept,scheme and implement method of WAC(wide area centrex)service,it also explains the princ iple,service procedures and reference data for realising local network WAC serv ice in NEAX61S exchanges.

• 介绍了广域虚拟用户交换机(WAC)业务的概念、方案、实施方法,并讲解了NEAX61S交换系统实现本地网WAC业务的原理、业务流程、参考数据等等。