The company says that following months of development and extensive testing ProVu have now certified their ProTalk door entry systems to be compatible with most SIP based phone systems including open source systems such as Asterisk. This new range of door phones simply register as a PBX extension; callers can be spoken to and also viewed from a PC screen or the screen of an IP phone such as a snom 821 or 870. Access can then be granted by simply pressing a button on the phone.
The ProTalk door entry systems also have day and night settings so that out of hours calls can be directed to alternative destinations. For example a caller at a London office can be answered by a receptionist in the US and they can decide on giving the caller access. Alternatively calls can be sent to a voicemail box or even a mobile phone.