350-060 Question #141: Real Exam Question with Answer & Explanation

Scenario: Your company hosts a Voice Over IP (VoIP) service for its customers. Your Voice Operations center is responsible for all VoIP applications, including servers, gateways, and provisioning. The NOC is responsible for the network infrastructure, including LAN, WAN, Firewalls, and QoS. Your Voice Operations Center started receiving calls in the early morning from customers who did NOT have dial tone and could NOT place or receive calls. The Operations Center was UNABLE to find any problems with their applications. At this point, they switched from the primary call manager to the secondary call manager to attempt to resolve the problem. This resolved the problem and customers had dial tone and were able to place and receive calls. It is now after 8:00 AM and both the Voice Operations Center and NOC are fully staffed for peak activity hours. The tickets opened earlier are escalated and you are assigned to work with the Voice Operations Center to find and fix the problem. You review the trouble tickets and then join the scheduled teleconference to resolve the problem. As a NOC member, which troubleshooting strategy should you suggest to the Voice Operations Center to help them isolate the problem to the call manager server or network?