A valid SIP address ( or phone number (tel: +41785556677) which will be called.


As the "Target" field, it should be a valid SIP address or phone number.
If this field defined, it will be used instead of "Target".
This is useful only for the internal purpose when the callback is scheduled based on incoming call
and a caller can enter alternative number for the callback using DTMF signals.
So, in most cases, for the external usage "Target" field is enough.


Defines how many times an unsuccessful dial-out is retried.


Defines the minimum time in seconds between retries of unsuccessful dial-outs.


The identifier of the service this callback will be executed on behalf of.
Should be a string representation of the valid guild(f.e.ff9aaf06-5282-4a45-8bd8-3f3c422f51b8) of the existing service.
You can use request "GET /v1.0/services" to retrieve services where you can find theirs Ids.
Alternatively, you can use ServiceSip parameter.


SIP address of the service.The purpose of this field is the same as "ServiceId".
This field will be used to identify the service only in case, if valid "ServiceId" is not provided.
So, not required if you provide "ServiceId", but should be provided if not.

Used by LUCS System when callback requests are created based on a LUCS service session. Currently used when the Callback Activity in the workflow is used or when a callback request is created automatically if customer hangs up.

AgentTaskPriorityType: StrictPriority, Highest, VeryHigh, High, Normal, Low, VeryLow, Lowest, NothingElse

  • Strict Priority: Calls are always placed in front of low-priority calls in the queue
  • other 7 priority levels: Prioritization in the queue is calculated according to the Weighted Round Robin method
  • Nothing Else: Calls are only transferred if no other customer is waiting in the queue
Array [ 9 ]

For Future Purpose: ContextUrl can be used to provide a link to be opened when request is distributed to the agent.
Not using at the moment in any scenarios.


The point in time system will try to process this callback.
Format: " hh:MM:ss". The API treats the DueDate as an UTC time.

Used by LUCS System when callback requests are requested by our own components. Currently used by our FE component if a Supervisor is creating a callback request in LUCS FE Lost Task Widget.

A comment which will be displayed to the agent who accepts the dialout (MAX LENGTH: 150 chars).


External TaskID can be submitted by the external system as a unique identifier (f.e. a CRM customer interaction/task identifier from an external CRM system).
Later this identifier can be used in other request commands to get a task status or cancel a task.


For Future Purpose:
If the API will be used by multiple systems, this field will allow to distinguish requests from different systems.