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 three troubleshooting steps should you perform from the network side
to help isolate the problem? (Choose three.)
A.
Verify that you can ping both the primary and secondary call managers.
B.
Request syslog files from both call manager servers.
C.
Call a telephone number from a trouble ticket to verify that a connection can be made.
D.
Check to see if the NOC operators missed alarms from the NMS system during the night.
E.
Determine if any network changes (e.g., IOS updates) were made prior to the first customer
calls
F.
Run a load test to verify QoS during peak network activity.