additional optmization techniques for underlying IP network must: 1.Have bandwidth and performance to handle converged services. 2.Seprate VLAN for Voice traffic. 3.Meet the demand of high availability of voice services by providing resiliency to mitigate the effect of network outages. 4.Should be modular, hierarchical & consistent to promote consistency and manageability. 5.configure QoS on core switch. Solution additional optmization techniques for underlying IP network must: 1.Have bandwidth and performance to handle converged services. 2.Seprate VLAN for Voice traffic. 3.Meet the demand of high availability of voice services by providing resiliency to mitigate the effect of network outages. 4.Should be modular, hierarchical & consistent to promote consistency and manageability. 5.configure QoS on core switch..