例如，许多呼叫中心使用互联网语音技术，与高质量的电话线相比，能以更低成本运营国际长途电话业务。
Many call centres, for instance, use voice-over-internet technology so that international calls can be handled more cheaply than with high-quality voice lines.
当一个呼叫中心忙时，你可以通知长途电话公司将所有的800呼入电话转移到另一个空闲的呼叫中心。
When one gets busy, you may tell your long distance company to route all the 800 inbound phone calls to the call center, which isn't busy.
当一个呼叫中心忙时，你可以通知长途电话公司将所有的800呼入电话转移到另一个空闲的呼叫中心。
When one gets busy, you may tell your long distance company to route all the 800 inbound phone calls to the call center, which isn't busy.
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