Let's say that there's an order to activate a DSL service. Doing so requires an inventory system to reserve a port. Later, the port value must be sent to an activation system.
During orchestration of the order, the following things happen:
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A callout makes a port reservation API call to the inventory system.
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The inventory system returns a specific port value, and a success response.
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Order Management stores the port value on the order (which it will use later), the callout is marked complete, and the workflow continues.
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When the order is ready for activation on the network, a second callout sends the saved port value to the activation system.
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The activation system returns a success response, the callout is marked complete, and the workflow continues.
Once a callout is sent, you can view the callout payload and any response in the Interaction Details section of the Details page of the orchestration item that sent the callout.