SetCallback

Configure callback settings for the contact.

Signature

IFlowBuilder SetCallbackNumber(string phoneNumber, string? identifier = null)

Parameters

Parameter	Type	Required	Description
phoneNumber	string	Yes	Callback number or attribute reference
identifier	string?	No	Optional identifier for the action

Examples

Use Caller's Number

Flow.Create("Callback Setup")
    .SetCallbackNumber(Attributes.System(SystemAttributes.CustomerEndpointAddress))
    .PlayPrompt("We will call you back at the number you called from.")
    .Disconnect();

Collect Callback Number

Flow.Create("Custom Callback")
    .GetCustomerInput("Press 1 to use your current number, or 2 to enter a different number.")
        .OnDigit("1", current => current
            .SetCallbackNumber(Attributes.System(SystemAttributes.CustomerEndpointAddress))
            .PlayPrompt("We'll call you back at your current number."))
        .OnDigit("2", different => different
            .StoreCustomerInput("Enter the callback number.", input => input.MaxDigits = 10)
                .OnSuccess(s => s
                    .SetCallbackNumber(Attributes.System(SystemAttributes.StoredCustomerInput))
                    .PlayPrompt("We'll call you back at the number you entered."))
                .OnError(e => e.PlayPrompt("Invalid number.")))
        .OnDefault(d => d.Disconnect())
    .Disconnect();

From Lambda Response

Flow.Create("Verified Callback")
    .InvokeLambda("GetCustomerInfo")
        .OnSuccess(s => s
            .SetContactAttributes(attrs =>
            {
                attrs["PreferredPhone"] = Attributes.External("PreferredPhone");
            })
            .SetCallbackNumber(Attributes.Contact("PreferredPhone"))
            .PlayPrompt($"We'll call you back at {Attributes.External("PreferredPhone")}."))
        .OnError(e => e
            .SetCallbackNumber(Attributes.System(SystemAttributes.CustomerEndpointAddress)))
    .Disconnect();

AWS Connect Block Type

This block generates the UpdateContactTargetQueue action with callback number configuration.

Best Practices

1. Validate numbers - Use Lambda to verify format
2. Confirm with customer - Read back the callback number
3. Handle international - Support E.164 format

See Also

• StoreCustomerInput - Collect phone numbers
• SetContactAttributes - Store callback info