call the signals

• 叫号； 给暗号

call the signals的用法和样例：

例句

1. I need to make a station to station call.
   我要打个叫号电话。
2. The cheapest is a station- to- station call, then a person- to- person call.
   最便宜的是叫号电话，然后是叫人电话。