[ Version ( since = "1.12" ) ]
public bool hold_and_accept_sync (Cancellable? cancellable = null) throws Error
Synchronously puts all active calls on hold and accepts the next waiting or held call.
The calling thread is blocked until a reply is received. See hold_and_accept for the asynchronous version of this method.
| this |
A ModemVoice. |
| cancellable |
A Cancellable or |
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