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a/b interface for PBXs, 2-wire audio and video intercom systems, programming and operation using a DTMF-capable PBX telephone. PBX interface requires item no. 306905 per call button and external power supply 12V AC/DC 100mA, 3 TE DIN.
| Property | Value |
| Function: | convert |
| Installation technology: | Bus system |
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