DTMF detection issues for VOIP calls (e.g. using key presses to acknowledge alarms over voice calls)
DTMF (Dual-tone multi-frequency signaling - Wikipedia) is responsible for communication of key presses over the phone call. TopView can use these key presses to allow calls to proceed, or to acknowledge alarms via voice notifications. Here are some ...
VOIP Phone call register/unregister issues
Overview TopView Voice Notification makes VOIP phone calls for alarm notification. The VOIP protocol is SIP. TopView is a "SIP client" that connects to the SIP Server to make phone calls. Each phone call in TopView is made by a separate call process ...
What do I need for VOIP call-out notification?
For many years TopView has supported voice call-out notification over traditional phone lines but, due to both hardware and software developments, voice notification via TAPI modems is much less reliable than it used to be (see the reliability ...
Voice Notification: What hardware do I need?
TopView 6.25 dropped support for voice notifications using TAPI modems and it will not be supported for future versions Due to the dwindling hardware and OS-level support for these devices we no longer support TAPI as a notification method. We ...
Ports used during TopView operation
TopView can utilize a number of ports to perform its job, configure your firewall to allow communication over the following ports: Data source related ports OPC requires the use of DCOM, which is negotiated over port 135 TCP. The client and server ...