When traditional call center transfers to IP call center, it always makes use of H.

传统呼叫中心升级到IP网络呼叫中心，往往采用H。

youdao

When traditional call center transfers to IP call center, it always makes use of H.

传统呼叫中心升级到IP网络呼叫中心，往往采用H。

youdao