The module can be used both without and with a PBX. Without a switchboard, only SIP devices, iPhones, iPads and PCs can receive calls from the outdoor unit. An analogue telephone line can be connected so that in the event of absence, the call can be routed in the traditional way to, for example, a GSM or another number.
With a telephone exchange, the solution is truly unique. The call is then sent simultaneously to both the classic telephone and the IP devices. You can answer with both and open the door. Call forwarding is then done via the switchboard.
Even installations of another brand of outdoor unit are compatible with the FT3000. However, these systems must be telephone-based. All Fasttel’s old door phones can be integrated, no matter how old.