我拥有一个耶鲁 EasyFit 报警系统，它允许我通过一个笨拙的电话接口来控制它（doc这里）
以下是其工作原理的摘录：
Remote Access
The control unit allows you to control your system
remotely through the telephone line.
1 Dial the phone number associated with the Control
panel.
2 Hang up on the first ring.
3 Wait 5-10 seconds.
4 Dial the number again.
5 The control unit will answer the phone on the first
ring of that second call.
6 Enter your PIN Code within 3 seconds.
7 If the PIN code is correct, you will hear a long
beep. A list of different functions is detailed below:
Press 2 Put the system into away armed mode (arm
the system).
Press 3 Disarm the system.
Press 5 Checking the system status. Long single
beep for Away Armed, two beeps for Disarmed and
three beeps for Home Armed.
Press 7 Siren on.
Press 8 Siren off.
Press 9 or 0 Disconnect.
• Remember to press 9 or 0 before you hang up, or
the control unit will hang up automatically after 30
seconds.
似乎应该有一个可以模拟铃声并发送按键音/收听响应的设备，但我不确定我应该寻找什么样的设备。我有一个备用的树莓派，我会用它作为主控制器并连接到任何所需的设备。可以使用任何微型电路板进行管理。
答案1
所讨论的设备旨在通过模拟电话线进行操作，为了实现自动化使用，您需要使用您可以控制的设备来模拟该“接口”，在这种情况下，最简单的可能是 SIP FXS 网关。