A1600P is 16 ports PCI interface asterisk card supports FXS-100 and FXO- ... , TrixBox ,Elastix , FreePBX and other Open Source Telephony projects with 16 included FXO-100 or FXS-100 modules. These cards are ... used to plug existing analog telephone lines into your phone system.With A1600P hardware, Open Source Asterisk PBX software, and a ...