Alcatel Lucent provides networking hardware, IP technologies, software, and services throughout the world, enabling customers to deliver voice, data, and video services. To help expand their API documentation, Alcatel Lucent subcontracted Essential Instructions to assist in the update and development of their call control API documentation targeted at developers. Essential Instructions also converted content from a legacy PDF format into a single sourcing solution and captured technical processes through detailed diagrams. Included in this work was the documentation of best practices using Alcatel’s frameworks, which involved a close working relationship with technical stakeholders to ensure accuracy and to capture the right level of detail.