Answers to
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Which Bluetooth profiles are supported by the SL78H / SL400H / S810H / S820H / S850H / SL910H handset?

Whether Bluetooth® devices can communication with each other is a profile question. It is important that they support and use the same Bluetooth® profile for different functions.

The Gigaset SL78H / SL400H / S810H / S820H / S850H / SL910H handsets are working with the Bluetooth® 2.1 standard  and support the following profiles:

Serial Port Profile (SPP) for data communication with a PC.
Headset Profile (HSP) and Handsfree Profile (HFP) for communication with a headset.
OBject EXchange Profile (OBEX) for the transfer of address book entries (vCards).

Known BT-Headsets, that do not work correctly with S810H, S820H and SL400H:
- Jabra Wave BT 3.0 (100-93050000-60)