01. Applicable for single buildings;
02. Common functions of calling, answering and unlocking;
03. Initial innovation of free address technology is adopted;
04. No need to set addresses on indoor phones;
05. All indoor phones are compatible with direct-call and digit-call door stations;
06. Intercom is available between apartments;
07. Isolation modules protects all apartments from any malfunction happened in an apartment;
08. Plug-and-play technology and BUS wires connection saves cost and time from wiring and installation;
09. Cat-5 cables are applicable;
10. Color picture memory is available with module L8-5005-5109-D;
11. Burglar alarm devices can be connected to indoor phones;
12. System can detect and warn wiring malfunction;
13. Privacy function available;
14. Door panels are with features of anti-vandal, waterproof, illumination and night viewing;
15. Easy to replace name tags;
16. Speech volume is adjustable in indoor phones;
17. Doorbell can be linked to an apartment;
18. Extra indoor phones are available for every apartments;
19. Exit button is available to link door stations;
20. Proximity cards are available to release doors;
21. Releasing lock overtime can be up to 10 seconds.

Specifications:
01. Camera: 1/3-inch CCD;
02. Display: LED or LCD;
03. Minimum illumination: 0.01lux;
04. Video output: 1Vp-p, 75Ω;
05. Audio SNR: ≥25dB;
06. Audio distortion: ≤7%;
07. Working voltage: DC 12V ± 10%;
08. Standby current: ≤116mA (direct-call) and ≤160mA (digit-call);
09. Working current: ≤450mA (direct-call) and ≤410mA (digit-call);
10. Power supply: DC 12V ± 10%;
11. Environment temperature: -40 to +70°C.