https://www.welivesecurity.com/2020/09/10/who-callin-cdrthief-linux-voip-softswitches/
ESET researchers have discovered and analyze a malware named CDRThief, which targets China-made VoIP softswitches (software switches).
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https://www.talkatone.com/
Apr 24, 2023 - Download the best VoIP phone call app to make free calls on iOS and Android. Unlimited calling plus international calling with or without WiFi.
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https://www.voipbusiness.com/voip-features/3-way-calling/
Oct 1, 2025 - Add a third participant to your calls effortlessly with our 3-way calling feature. Perfect for training, sales support, or collaborative calls.
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https://www.webex.com/suite/enterprise-cloud-calling.html?ref=tangerine.coffee
Replace PBX networks with the proven quality and security of Webex cloud phone systems. Enjoy flexible licensing options, integrated calling plans and...
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https://www.goto.com/connect/features/voip-calling-apps
GoTo Connect's VoIP calling apps give you and your employees the freedom to work in sync no matter where you're working or which devices you're using.
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