| MakeCallAsync(DN, String) | |
| MakeCallAsync(RegistrarRecord, String) |
initiates call from the specific device. CallManager implements this request using uacsta request normal call flow or using emulation where the source of the call will be "called by callmanager". In either case the call is observed as normal call initiated by the device. |
| MakeCallAsync(String, String) |
This is legacy method of call initiation which is implemented using MakeCall helper system extention.
in V20, call can be initiated only from local source (system extension or user extension)
Calling "from" external numbers are not supported. |