FIELD: telephony; calling, intercommunication, and unlocking entrance door in apartment houses. SUBSTANCE: system has calling unit (door intercom, entrance door unlocking unit, dialer), control unit, n- apartment units, where n is number of entrance apartments, and communication lines. Novelty is that control unit is made in the form of two decade switchboards and multichannel current switch. EFFECT: improved design. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| INTERCOM-CONTROLLING SYSTEM | 1992 |
|
RU2019057C1 |
| DEVICE FOR RINGING,TALKING AND UNLOCKING FRONT DOOR OF ENTRANCE | 0 |
|
SU1131042A1 |
| MULTIFUNCTIONAL DOMESTIC ANNUNCIATOR | 2002 |
|
RU2205520C1 |
| HOUSEPHONE-AND-LOCK DEVICE | 0 |
|
SU1791616A1 |
| INTEGRATED MULTI-FUNCTIONAL CONTROLLING AND MONITORING SYSTEM | 2004 |
|
RU2281614C1 |
| ACCESS CONTROL SYSTEM | 2004 |
|
RU2259019C1 |
| LOCKING-TALKING DEVICE | 0 |
|
SU1474867A1 |
| COMMUNICATION LOCK | 1999 |
|
RU2141171C1 |
| MULTIFUNCTION DOOR INTERCOMMUNICATION SYSTEM | 2001 |
|
RU2185037C1 |
| INTERCOM AND LOCKING DEVICE | 1993 |
|
RU2071538C1 |
