Yet industry observers caution that PBXs are prone to year 2000 complications.
工业界的观察家也提醒人们专用小交换机易受2000年复杂性伤害。
Multiple location support including support for a wide variety of phone systems, PBXs, switches and gateways.
多个地点支持，包括支持多种不同的电话系统，交换机，交换机和网关。
"Over the short term, we believe many customers are extending the life of their PBXs with software upgrades to call control in order to reduce budget outflows," Weckel added.
短期内，我们相信很多客户为了压缩预算，都在利用软件升级到呼叫控制，来延长PBX设备的生命周期。
But the traditional PBXs are based on private technology and lacks of open standards, have shortages in flexibility and extensibility, needs high cost for maintenance and upgrade.
然而传统PBX采用的是专用技术，缺乏技术标准，可扩展性和灵活性差，维护成本和升级费用高昂。
But the traditional PBXs are based on private technology and lacks of open standards, have shortages in flexibility and extensibility, needs high cost for maintenance and upgrade.
然而传统PBX采用的是专用技术，缺乏技术标准，可扩展性和灵活性差，维护成本和升级费用高昂。
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