| 1. | Ringing and tone for telephone automatic switching network
电话自动交换网铃流和信号音 |
| 2. | Bandwidth management policy for optical burst - switched networks
光突发交换网的带宽管理策略 |
| 3. | An optimal routing algorithm for shuffle - exchange networks
一个针对洗牌交换网的最优路由算法 |
| 4. | The major exception is being on a switched network segment
（主要例外情况发生在交换网段上。 ） |
| 5. | Subscriber line signaling system for telephone automatic switching network
电话自动交换网用户信号方式 |
| 6. | Pspdn : packet switched public data network
公众分组交换网 |
| 7. | Pstn public switched telephone network
公共电话交换网 |
| 8. | Pstn public switched telephone network
公用电话交换网 |
| 9. | The process of setting up a data transfer on a pstn line
在公用电话交换网( pstn )线路上建立数据传输的过程。 |
| 10. | Public switched telephone network
公用电话交换网 |
