The Behnke phone BT 20-112 consists of three field-replaceable modules.
The modules can thus be adapted as needs change. Through
the large distance between speaker and microphone, the device to be
Use in a noisy environment. With the DSS, numbers can
be selected directly. The unit can be painted in any RAL color.
Door intercom phone 3x vertically consisting of:
- Great base for electronics phones with integrated electronics (electronic extension possible).
- Module with Speaker (Size 3 = large).
- Module with 2 buttons on the left, with labeling field 41 x 15 mm.
- Module with microphone oval design in the center.
- Front frame 3x vertically.
- Modules and front frame made of natural anodized aluminum (with a slight edge).
- Modular design, thereby arbitrarily expandable / replaceable.
- Back enclosure made of sheet aluminum and powder coated anthracite.

Specifications:

- Connects to analog telephone network, a / b interface, DTMF dialing.
- Full duplex telephone, half duplex and push to talk.
- Power supply via a / b line, 20-60 mA, 20-70 VDC.
- 1 watt booster amplifier integrated (12 V DC power supply is required).
12 V = floating + / - 3V max. 500 mA. Note: Only required for
Lights, Camera, integrated heating, additional amplifier or
Electronic expansion.
- Built-in heater (12 V DC power supply is required).
- Volume electronically adjustable (automatic volume control).
- 2 potential-free contacts with various switching functions contain (eg TÖ function).
- Sammelruffunktion / redial.
- Programmable via telephone with tone dialing (DTMF) or buttons on the board.
- Door opener from inside via DTMF dialing.
- Possible connection of various Behnke camera modules.
- Programming: Local keypad on / integr. Keyboard, remote programming
a DTMF telephone, remote programmable with BNOS Emergency control center.
- Tested to TBR 21 and EC 201121 (network access across the EU), EN 55022,
EN 55024 (EMC), EN 60950 (electrical safety).
- Corresponds with IP 54 and IK 9