8.3.6.1. Specific Scenarios 
In some specific scenarios the calls cannot be moved.
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You are part of a large conference call (station controlled conference) - If you are taking part in a large conference (a conference initiated on-demand using the desk phone) you are be allowed to move the call until the call reverts back to a simple (two-party) call. More specifically, after the other participants leave the conference and you are left with only one other person in that call, you can move the call.
INFO:
This restriction does not apply if you dialed a conference bridge number. In this case, you are still able to move the call to other devices. -
The call is in a keyset secondary line appearance - If the call is active in a secondary line appearance you are allowed to move the call only after moving it to the primary line appearance (hold on the secondary line, retrieve in the primary line).
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You received a call from a Multi-Line Hunt Group (MLHG) queue - If your desk phone number is an agent of a MLHG queue, calls that are received from the queue (via the pilot number) can not be moved.
INFO:
This does not apply to calls made directly to your phone. If someone calls your desk phone directly you are able to move the call. -
You started a silent monitor call - If you start a silent monitor call (dial the silent monitor access code, followed by the extension to be monitored) you have to finish the call in the device that started it (i.e., the desk phone or OpenScape Mobile Pro). Such calls can not be moved from one device to another.
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You started a local conference from your desk phone - When you create a local conference (i.e., 3-way call) via your desk phone, the OpenScape Voice Server is not aware that the called parties are conferenced and will only move one leg of the 3-way call. The other party will be left on your desk phone. This can be avoided in future by contacting your System Administrator to request configuration for “Large Conferencing” (i.e., station-controlled conference).