Originally my router/PBX this Dell P4 was installed with some of the earliest Digium PCI analogue cards. This card supported both FXS and FXO modules, and i used them both in various configurations. One of the FXS modules is what allowed my housemate’s old rotary phone to connect to the house phone system. I loved testing the system by ringing his phone. The ringing of its actual bell, was a delight. That dell survived the infamous flood (by already being decommissioned). I think I paid over $200 for this card alone. Now i run Asterisk off my Raspberry Pi with a total hardware cost considerably less than that.
After Google killed XMPP support for Google Voice, I no longer had a house phone. I was using my Google Voice number as a home phone and for the gate info our building. This lead to the whole system being ignored and neglected. By the time the SD card gave up the ghost, even the backups were in poor shape. I rebuilt the whole system fresh from the latest 
