| RingCentral .Net SDK
    | 
| Properties | |
| string | proto  [get, set] | 
| Protocol for hold mode initiation Default: Auto Enum: Auto, RC, BroadWorks, DisconnectHolder  More... | |
| 
 | getset | 
Protocol for hold mode initiation Default: Auto Enum: Auto, RC, BroadWorks, DisconnectHolder