1.4 General informationR In the event of problems, you should contact your equipment supplier in the first instance.R The available products differ depending on your region. For more information, please consult your dealer.R In this document, the suffix of each model number (e.g., the "BX" in "VL-SWD272BX") is omitted unless necessary.When the suffixes are used to describe models (e.g., "BX models"), the suffixes refer to all models in the series.R All the functions listed in this document are available for the supplied main monitor. However, the functionsavailable for the doorphone and lobby station differ depending on the model of the doorphone and lobby station.For more information about optional doorphone and lobby station, see "1.3 Additional/replacementaccessories" on page 4.R Design and specifications are subject to change without notice.R The illustrations in the supplied document(s) may vary slightly from the actual product.House mode and Apartment modeThe main monitor can be configured to be used in two modes: House mode and Apartment mode.R House mode refers to when the main monitor is used as a stand-alone system and is not connected to a largersystem comprised of a VL-V900 lobby station. This document describes the operations for House mode.R Apartment mode refers to when the main monitor is used connected to a larger system comprised of a VL-V900lobby station, such as in apartment complexes. Operations for Apartment mode are described in 12 VL-V900basic operations (Page 35) of this document as well as the Supplemental Information. The SupplementalInformation can be accessed from the following Web site.http://panasonic.net/pcc/support/intercom/swd272For EuropeDeclaration of Conformity:R Panasonic System Networks Co., Ltd. declares that the radio equipment type (VL-SWD272BX/VL-SWD272CX)is in compliance with Directive 2014/53/EU.The full text of the EU declaration of conformity is available at the following internet address:http://www.ptc.panasonic.eu/docContact to Authorised Representative:Panasonic Testing CentrePanasonic Marketing Europe GmbHWinsbergring 15, 22525 Hamburg, GermanyEcodesign informationEcodesign information under EU Regulation (EC) No. 1275/2008 amended by (EU) Regulation No. 801/2013. From1 January 2015.Please visit here: www.ptc.panasonic.eu/erpClick [Downloads]a Energy related products information (Public)Power consumption in networked standby and guidance are mentioned in the Web site above.Graphical symbols for use on equipment and their descriptions1 2 3 4 5 67 8 9 10 11 121. Alternating current (A.C.) 2. Direct current (D.C.) 3. Protective earth 4. Protective bonding earth 5. Functional earth6. For indoor use only 7. Class P equipment (equipment in which protection against electric shock relies on DoubleInsulation or Reinforced Insulation) 8. "ON" (power) 9. "OFF" (power) 10. Stand-by (power) 11. "ON"/"OFF" (power;push-push) 12. Caution, risk of electric shock51. Introduction