How to arrange a call via voice modem on freeBSD?

Question

FreeBSD

Good day. There is a server with freebsd 9.1 The server is running zabbix. About 1000 hosts are observed. For some network nodes, it is critical to monitor the parameters around the clock, and in the event of an accident, information must be obtained in a timely manner.
SMS can be overslept and not heard. There is an analog telephone line and voice modem. I'm not very friendly with unix yet, but I really need to implement a "dialer". Is there any modem software to play a pre-recorded sound file? Or do I need to write a program? If you write yourself, where do you start? Thanks in advance

Answer 1

It is necessary to dig towards asterisk. You can do it even easier right away on sip.