| 单词 | call waiting |
| 释义 | call waiting 1. A CLASS service of the public switched telephone network (PSTN). Call waiting allows an incoming call to wait in queue if the target telephone line is engaged. A call waiting signal alerts the user of the target telephone line to the fact that a call is waiting. See also CLASS and PSTN. 2. A voice telephone system (e.g., PBX or Centrex) feature that allows an incoming call to wait in queue if the target station is engaged. A call waiting signal alerts the user to the fact that a call is waiting. See also camp-on. |
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