[TowardEX NOTIFY-ALL] Scheduled Network Maintenance Notification 1/25/2008

[Change Control S3D]

Dear TowardEX Customer,

TowardEX has scheduled a maintenance event to replace one of our border routers and 
cut-over all related backbone circuits through the new MMR connections at 
1 Summer Street (Boston, MA) datacenter.  The maintenance window is scheduled to
commence at 4am EST on Friday 1/25/2008 and conclude by no later than 7am EST.

Due to built-in redundancy features in our network, customer impact is expected to 
be minimal, because backup systems will be running during the maintenance.  Customers 
may experience brief service interruptions or route changes  lasting up to a couple
minutes or so between 4am and 4:30am.  After 4:30am, no significant impact is expected,
however the remainder of maintenance event should be considered as a precautionary 
window until 7am.

If you are unable to connect or having problems for an extended period of time after the
maintenance event, please contact 1-617-459-4051 extension 500.

TowardEX is providing this notification so that you can determine if business
continuity preparations are necessary. We regret any inconvenience this 
maintenance activity may cause you or your organization. As usual, we are 
committed to keeping you informed about the status of maintenance activities
affecting your service reliability.

Important Notice to E-mail Recipients: Notice sent as a customer courtesy only 
and is not a service level agreement or other commitment. Scheduled maintenance 
events may not give rise to claims for credits. 

Thank you,
Change Management
TowardEX Technologies, Inc.
Helpdesk: (617) 459-4051 option 2
Email: cmc at towardex.com

The maintenance operation is scheduled as follows:

03:00 AM: Equipment, facility and system checks. 
03:30 AM: Preparation of new single mode fiber backbone connections thru MMR.
03:50 AM: Redundant circuits operational capacity check, final system check (go/no go).
04:00 AM: Disconnect AboveNet transit.
04:00 AM: Disconnect private peers.
04:00 AM: Disconnect Boston MXP.
04:00 AM: Disconnect IPv6 transit.
04:05 AM: Remove existing border router off of backbone routing.
04:05 AM: Disconnect all multimode fiber connections between/from 4th floor rooms 
          heading out to the old room to connect into existing border router.
04:05 AM: Connect new single mode fiber connections between/from 4th floor rooms to
          new router (Cisco Cat6500).
04:10 AM: Customer impact check, backup/redundant circuitry operational check.
04:15 AM: Introduce new router into backbone routing protocols.
04:20 AM: OSPF and IBGP backbone routing check, customer impact check.
04:22 AM: MPLS operational capacity check.
04:25 AM: Re-connect AboveNet transit.
04:25 AM: Re-connect private peers.
04:25 AM: Re-connect Boston MXP.
04:25 AM: Re-connect IPv6.
04:30 AM: BGP routing check. All customer impacting maintenance operations to conclude
          by this time.
05:00 AM: Electrical work in mdf hub cabinets 4A and 10D.
05:30 AM: Electrical power redundancy tests; test A/B feed load failure modes for 
          automatic transfer switches.
06:00 AM: Wrap-up.