Code Blue Corp.
IP1500 and IP2500
The IP1500 and IP2500 from Code Blue are cost-effective VoIP emergency speakerphones with full duplex SIP functionality. They are ideal for a wide range of indoor and outdoor locations, like hallways, stairwells, classrooms, subway cars, parking garages, elevators and door entries. Available as lightweight surface and flush mounts that are vandal, UV and weather resistant, they provide crystal clear sound clarity for both the caller and operator. Fault monitoring and self-reporting, a UL 2017-certified feature, eliminates the burdensome task of regular maintenance checks, while a convenient auxiliary output can be used to trigger a light, door or gate.
http://codeblue.com/product/ip1500/