More extensive deployments would require VoIP to integrate with the data network as well as the phone system currently in use. This may require some upfront network assessments, and possibly a network upgrade to accommodate VoIP. Once VoIP is deployed, the impact on operational costs should be minimal. Depending on how much VoIP is being used, there may be a need for network monitoring tools to ensure voice quality and to prioritize voice traffic over data traffic.
As VoIP gains wider adoption across the business, the next step will be to plan projects around a more complete migration away from TDM. This will involve moving to a fully converged network environment, which should lead to reduced operational costs in that IT will now only need to support one network, not two. Another project to plan for would be the eventual turnover from legacy telephony systems to IP systems. Not only will these systems be less costly, but they will require less ongoing maintenance and support.
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