# OTSessionICEIncludeServers Constants Reference

Declared in | OTSession.h

### OTSessionICEIncludeServers

Defines settings for whether to use only your custom TURN servers or to use those servers in addition to OpenTok TURN servers. Defines values for the <OTSessionSettings.iceConfig> property.

#### Definition

`typedef NS_ENUM(int32_t, OTSessionICEIncludeServers ) {
OTSessionICEIncludeServersAll,
OTSessionICEIncludeServersCustom,
};`

#### Constants

`OTSessionICEIncludeServersAll`

  Uses both Vonage Video API TURN servers and (if any added) custom TURN servers.

  Declared In `OTSession.h`.

`OTSessionICEIncludeServersCustom`

  Use only custom TURN servers.

  Declared In `OTSession.h`.

#### Declared In

`OTSession.h`