ActionID - ActionID for this transaction. Will be returned.
Channel - Channel name to call.
Exten - Extension to use (requires Context and Priority)
Context - Context to use (requires Exten and Priority)
Priority - Priority to use (requires Exten and Context)
Application - Application to execute.
Data - Data to use (requires Application).
Timeout - How long to wait for call to be answered (in ms.).
CallerID - Caller ID to be set on the outgoing channel.
Variable - Channel variable to set, multiple Variable: headers are allowed.
Account - Account code.
EarlyMedia - Set to true to force call bridge on early media..
Async - Set to true for fast origination.
Codecs - Comma-separated list of codecs to use for this call.