| 3. | Essential requirements for connection of terminal equipment to 2 - wire analogue interfaces , without capacitive termination , of public switched telecommunication networks using either the earth calling , the loop calling - disconnect clearing , the loop calling - guarded clearing or the loop calling - unguarded clearing signalling method
使用地面呼叫,无连接清零,防护清零或无防护清零任何一种信号方法的公共开关电信网络双线模拟接口 |
