F1 is the economic solution for telephone recorder by existing PC and landline connection.
The F1 software Fonkorder1 presents not only call record but also caller ID, date, time, elapse and status. It features voice announcement and answering machine as well. All records will be saved in user’s PC, and storage capacity is per 1G for 70 hours. A single computer supports up to 4 F1 simultaneously.
F1 provides open source API optional for integrating with external systems, making it more valuable

https://www.artech.com.tw/en/product/detail/93

F2/F4/F8 is the economic solution for telephone recorder by existing PC and multi-line connection.
TheF2/F4/F8 software ARTECH recording system (client) presents not only call record but also caller ID, date, time, elapse and status. It features voice announcement and answering machine as well. All records will be saved in user’s PC, and storage capacity is per 1G for 70 hours. A single computer supports up to 4 F2/F4/F8 devices simultaneously.
F2/F4/F8 provides open source API optional for integrating with external systems, making it more valuable

https://www.artech.com.tw/en/product/detail/94