Voice notifications
TopView and Twilio migration to single IP address for Elastic SIP Trunking services
From Twilio's notice - IP Addresses for SIP Services | Twilio: Starting 26 September 2023 Twilio will begin migrating the media IPs and port ranges for Voice SDK calls in all regions to 168.86.128.0/18 and expanding the UDP port range to 10000-60000. ...
Troubleshooting voice call issues with the Grandstream UCM 6xxx devices
TopView can make VOIP calls for notifications through the Grandstream in order to call through an analog line. This article provides a number of methods to verify your system is able to make voice calls through this device. If you have not yet ...
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 ...
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 ...
SIP.US Call settings for TopView and troubleshooting
Overview TopView supports online/hosted SIP Servers for TopView Voice Notification call out. SIP.US is a hosted SIP Server. While most SIP Servers will work with TopView, we have tested a few and can recommend them for use with TopView: see TopView ...
VOIP and SIP issues
If test voice notifications via VOIP are experiencing difficulties, we recommend the following tests and procedures: Make sure you're running the most recent version of TopView possible, along with any patches for that version. Verify that the ...
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 ...
What codec should I use for voice calls?
TopView voice calls over VOIP allow the specification of a codec used for encoding the audio to be used during the call. This article explains what codecs are and why you might want to use a codec that is different from the defaults used by TopView. ...
Text-to-speech (TTS): Where can I get better Voices?
Voices provided by the Windows OS have improved over the years since Windows XP and are good voices to use for TTS. We recommend Microsoft Zira for use with TopView. Other voices can be purchased from 3rd parties and provide quality speech at ...