Hurricane Watch: An announcement that sustained winds of 64 knots (74 mph or 119 km/hr) or higher are possible within the specified area in association with a tropical, subtropical, or post-tropical cyclone.
PSTN Definition The public switched telephone network (PSTN) is the worldwide collection of interconnected public telephone networks that was designed primarily for voice traffic. The PSTN is a circuit-switched network. That is, a dedicated circuit (also referred to as a channel) is established for the duration of a transmission, such as a telephone call.
Updated June 13, 2017. PSTN is the abbreviated term used for landline telephone system. Another term commonly used for it is POTS, which stands for Plain Old Telephone System, a non-geek way of naming the landline that is now old and quite plain and flat when compared to new competitors on the market.