PREPOJ
The "PREPOJ" switch is an additional device that is connected between the BLLW / LCL lift intercom and the telephone line. The telephone line (2 wires) passes through the "PREPOJ" switch and continues to the BLLW intercom (3 wires). For the function of the switch, it is necessary to supply 12V and connect a standard analog phone with tone (DTMF) dialing. The phone is connected with a standard telephone cable with RJ11 connectors.
Features:
- 12V power supply (must not be connected to ground)
- To automatically activate the communication, the intercom in the lift car is connected by 3 wires
- The telephone in the engine room is connected with a standard telephone cable
- Picking up the connected phone automatically disconnects the outside line
- The connected telephone allows programming of the intercom in the lift car
Talk to the engine room
A call between the machine room and the BLLW (or LCL) intercom is a special case that takes absolute precedence over all other calls. This is due to the fact that the telephone line is disconnected during a call with the engine room, so there is no reason to monitor other states of the BLLW intercom. For the intercom, the call with the engine room appears as an incoming call, i.e. parameters can be programmed, the "PREPOJ" switch can be controlled, but the call cannot be terminated or is not time-limited. The possibility of talking to the engine room is only when using the "PREPOJ" switch and at the same time using the third wire (the telephone line has two wires and the third wire is used to control the intercom). The call is activated by picking up the handset on the connected telephone to the "PREPOJ" box (both are in the engine room). The intercom picks up immediately (it is active), this status is signaled by both lights (yellow and green), voice communication is enabled and the call lasts until the telephone is hung up in the engine room. By hanging up the telephone, the telephone line is immediately connected and the BLLW intercom is fully functional. Programming can be entered from the connected telephone at any time during communication (#xxxx - where xxxx is the service password) and after programming, the call between the lift cabin and the machine room remains active until the telephone hangs up.