Adapter for connecting 4-wire or FTZ-INTERCOMS to a a/b-Port of ICT systems.The conversion of the telephony to IP, often the purchase of a new telephone system. These modern ICT systems are state of the art and offers plenty of modern features, but a connection for the existing turstationen will be in vain.For this reason, the auerswald the solution: With the intercom adapter TSA-a/b can be intercoms with an older 4-wire interface or with a 2-wire connection to FTZ 123 D 12-0, which may be made of structural reasons, do not simply exchanged, on the analog port of a modern, VoIP-enabled telephone system can be connected.The existing door station, for example Siedle, Ritto, Grothe, Telecom or auerswald can remain. The TSA-a/b was not only for auerswald ICT systems, it is suitable for operation on all standard telephone systems with analogue subscribers ports.This text is machine translated.