Confidential and proprietary

NPAC Application Server Migration

2/17/05

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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.

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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 25th

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

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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

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FAQs - 3

Q – How will the IP change be coordinated between SPs and the NPAC?

A – An e-mail will be sent out on March 1st defining the process. This will be followed up with a conf call on March 10th. Finally, the steps that need to be followed during the actual maintenance window will be defined by March 22nd.

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.

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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.