General InformationThe V-2900 Door Answering Unit provides voice contact from a designated telephone station to a door. When used in conjunction with a door plate speaker, pressing the pushbutton on the door plate will cause the phone to ring (1 second on, 4 seconds off). By answering the call, the system user can converse with the person on the door. (The telephone may also call the door speaker).Network & CommunicationConnectivity Technology: CablePhysical CharacteristicsForm Factor: Wall MountHeight: 8.3"Width: 4.5"Depth: 2.4"Weight (Approximate): 3.10 lbMiscellaneousPackage Contents: V-2900 Intercom Door StationPower SupplyAdditional Information: Ring GeneratorBuilt-In Talkback AmplifierTransmit and Receive Volume ControlProvides Two-Way CommunicationCompatibility: Compatible with all Valcom Doorplate SpeakersCertifications & Standards: CECSAWarrantyLimited Warranty: 1 Year