When used with an analog phone line, the VR-1A will provide "ring" indication, "on the phone" indication and "message waiting" indication for both "stutter dial tone" and standard message waiting voltage. In this application the VR-1A connects directly to tip and ring.
When used with a headset, you can end those nagging interruptions that occur when associates??? don???t realize you are on the phone because you are using a headset. The VR-1A will flash twice indicating to everyone that you are on the phone and you are not to be disturbed. The VR-1A installs in the handset/headset jack using an included "T" adapter.
When used with electronic or digital phones, the VR-1A won???t have you guessing which phone is ringing in busy offices. The flashing LED can be seen up to 100 feet away. The VR-1A connects directly to the electronic phone???s speaker.