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State-of-the-art end-to-end encryption (powered by the open source Signal Protocol) keeps your conversations secure. We can''t read your messages or listen to your calls, and no one else can either.
Signal app down? Current outages and problems.
Real-time outages and problems for the Signal app. Can''t send messages? No server connection? Here you see what is going on.
Download Signal App for Android, iOS or Desktop
Download Signal app for Android, iOS, iPhone, iPad, iPod Touch, or Desktop for free! Get the latest version of Signal Messenger.
What is Signal and is it secure?
Signal, an end-to-end encrypted messaging app long considered one of the most secure in the world, has recently faced attacks from hackers accused of links to Russia.
Download Signal
Download Signal for Android, iOS, Linux, macOS, and Windows.
Signal Download Free
Say "hello" to a different messaging experience. An unexpected focus on privacy, combined with all of the features you expect.
Signal Private Messenger
Signal is a messaging app with privacy at its core. It is free and easy to use, with strong end-to-end encryption that keeps your chats and calls completely private.
Signal app news, tips, help, info and more
Signal is working on a standalone version of its desktop app and more adjustable options for Signal Desktop. Signal will roll out new measures to help prevent and detect phishing attempts. FBI was
signal
signal. (noun) (n) A gesture, sound, wave, action, impulse, or indication of something to pass along information.
Optical Power Meters & Sources
High-precision power meters (Ge/InGaAs) and stabilized light sources for insertion loss and return loss testing.
OTDR & Fiber Characterization
Full-featured OTDR, fiber OTDR testers, and modular OTDR test modules for network deployment and troubleshooting.
OSA & Eye Diagram Analyzer
High-resolution OSA for DWDM and eye diagram testers for signal integrity validation.
BERT & Endface Inspection
BERT up to 800G, fiber endface inspection probes, and extinction ratio meters for comprehensive testing.