The DBS hybrid key system supports digital keysets and analogue handsets, and can use either DASS2 lines or Euro-ISDN lines.
Pre-configured systems can be expanded via extra cards, and also by the addition of further cabinets. There are three basic system sizes and three expanded systems sizes (can be expanded up to 144 digital keyphones or 136 two-wire telephones).
The SDBS is an analogue hybrid key system that is available in two, pre-configured, system sizes. It supports analogue keyphones and two wire handsets on analogue lines only.
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