Confidential and proprietary NPAC Application Server Migration 2/17/05

2 Confidential and proprietary Proposed Schedule Regression Testing from 4/11/05 to 5/6/05. Group and Fail Over Testing from 5/9/05 to 5/20/05. First Region Deployed on Sunday 5/22/05 First Region Burned in for 4 Weeks. Regions 2, 3, 4 and 5 Deployed on Sunday 6/19/05. CA Deployed on Sunday 7/10/05. Regions 6, 7 and SOW 34 Deployed on Sunday 7/17/05. May Require Extended Maintenance Windows.

3 Confidential and proprietary FAQs - 1 Q - When do SPs need to submit their IP addresses to NeuStar? A - Unless an SP is also simultaneously changing their IP address there is no need to submit this information. Q - When will SPs receive IP addresses from NeuStar? A – For production systems, 8 weeks prior to going into production. March 25 th per current schedule. For Regression Test bed next Thursday 2/24/2005 Q – Are new IP addresses required for Regression Testing? A – Yes. Will be provided 2/24/05. Q – Will SPs be able to test the new IP addresses before conversion? Y – All production systems will be available on 4/25 to allow “pinging” through the firewall. The Regression Test bed will also be available for “ping” testing on 3/28/05

4 Confidential and proprietary FAQs - 2 Q – What is the environment for Regression Testing? A – NeuStar will provide a new Test environment specifically for this purpose. This Test bed will be used for Regression, Group and fail over testing. This is in addition to the SOW 34 test bed. Q – What steps must the SPs take to participate in Regression testing? A – SPs will be required to submit Profile information by 3/28/05. SPs will also need to schedule their participation in Regression testing via the CCS Testing coordinator starting on 2/24/05. Finally, key exchange will take place when an SP is ready to start testing. Q – Do SPs need to stop SMG NPAC Gateway during the maintenance window A – To be specified

5 Confidential and proprietary FAQs - 3 Q – How will the IP change be coordinated between SPs and the NPAC? A – An will be sent out on March 1 st defining the process. This will be followed up with a conf call on March 10 th. Finally, the steps that need to be followed during the actual maintenance window will be defined by March 22 nd. Q – Is an extended maintenance window going to be required? A – At this time it is not expected that an extended window will be required. Q – Will SPID migration be allowed during these maintenance windows? A – For those regions undergoing the transition, SPID migration will not be allowed. For other regions, it will be a usual maintenance window, and SPID migration will be allowed.

6 Confidential and proprietary FAQs - 4 Q – Will there be conference calls to discuss the migration? A – The Industry Testing calls will resume on a weekly basis starting in March Q – How can SPs get more information about the scope of the Regression testing? A – SPs can review the contents of the Regression Test Suite located at the NPAC web site. SPs can also ask questions during the weekly Industry Testing conf calls. Q – Will there be another fail over test this year to test the new hardware? A – Yes. Probably in late fall – like last year.