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想采用ATM来综合话音和数据业务的网络管理员,一直受其使用不便,价格颇高所困扰。由于大多数电信公司不能在一条线路上提供传送话音和数据的ATM服务,他们不得不经营话音和数据分开的网络。
Network administrators who want to incorporate ATM for voice and data services have been bothered by inconvenience and high price. Since most telcos can not provide ATM services that carry voice and data over a single line, they have to operate a network of separate voice and data.