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Implementation Phase
After you have documented the design phase on paper, the next vital phase in the PDIOO lifecycle is implementation. This phase helps to ensure that the deployed network delivers all of its desired functionality. This phase involves developing the implementation strategy and procedures.In large networks, the company might subcontract some of the implementation tasks, such as physical deployment of IP phones, configuring the IP phones in the CallManager, and so forth. Hence, defining the process is important so that subcontractors can leverage this process and follow the methodology developed. This ensures timely resolution of any problems that are encountered during the implementation.A good strategy for implementing the IPT rollout in large networks is to divide the whole project into small phases. Choose a small section of the network in the initial phase of the deployment. After you successfully complete the IPT deployment for the first phase, move to the other parts of the network in an orderly fashion.You should monitor the network utilization statistics and the functionality of the newly deployed network at every stage. Keep a log of the problems reported by the users and modify the implementation procedures to ensure that users of the future IPT rollout do not face the same issues. At any given stage, resolve any unexpected behaviors and conduct thorough research on the root cause of the problems before further deployment.An implementation strategy should have at minimum the following steps clearly defined and documented:Identify the implementation team responsible for provisioning the new IPT system into the production network.Identify and standardize the implementation tools that are useful in deploying IP phones and other IPT endpoints.Document clearly the installation and configuration steps for various devices.Define the migration user groups and timelines for the migration.Inform users about the new phone system and plan for end-user training on using the new phone features.Communicate routinely with telephone companies (telcos) to coordinate the configuration changes required on the central office switches and the support required for cutover to the new IPT system.Provide updates to the PBX/voice-mail system and other telecom engineers and ensure that they perform the changes required on these systems for successful migration/integration of them to/with the new IPT system.Prepare a telephone number management system to track the phone number allotments and changes.Ensure that constant communication occurs between the implementation team and the design staff to exchange the problems faced in the field and solutions to the problems.Define the escalation procedures to address the feature and functionality faults or network tuning requirements as discovered during implementation.Provide the organization with a technical review for IPT-related field alerts that might affect the customer's current implementation.Communicate to the executive team and to the users if there is any downtime that could be caused by this deployment.
Depending on the customer's organization and type of business, you might need to define additional strategic steps to successfully deploy the IPT network. Chapter 9, "Operations and Optimization," covers the detailed implementation steps for deploying various IPT components and applications and introduces you to some of the implementation tools.
