*** IT IS URGENT THAT YOU READ THIS COMMUNICATION 
AND SHARE WITH YOUR IT MANAGEMENT PERSONNEL ***

Dear ESI Customer,

We are pleased to announce that ESI is expanding our network! In July we are opening a new state-of-the-art data center located in Plano, Texas. The purpose of this new location is to provide improved call quality to more areas of the country.

The new facility will go online July 20, 2018 and begin processing calls.

IF THE PROCEDURE BELOW IS NOT DONE PRIOR TO JULY 20, 2018 
YOU WILL LOSE INBOUND CALLS!

PLEASE ENSURE THAT YOUR IT MANAGEMENT PERSONNEL PERFORM THIS ACTION 
PRIOR TO JULY 20, 2018!

IF YOU DO NOT HAVE AN IT MANAGER OR HAVE QUESTIONS, 
PLEASE CONTACT ESI CUSTOMER SUPPORT AT 1 (800) 850-2151 
OR 611# ON YOUR HOSTED ESI PHONE.

What you will need to do prior to that date:

• You must add our new IP range to your approved firewall/QoS rules prior to July 20th in order to avoid loss of inbound calls.

• Ensure that your IT Management Personnel perform this action OR contact ESI Customer Support as soon as possible.

The new IP range is: 172.83.95.0/24

NOTE: ESI customers utilizing our SimpleWAN solution will be updated by ESI. 
All other customers must make these changes in order to ensure calls continue to work after July 20th.

Thank you for your continued business!

Shawn Guenther 
Vice President of Technology
Estech Systems, Inc. (ESI)

Have questions? Contact ESI Customer Support at 
1 (800) 850-2151 or 611# on your Hosted ESI Phone.

To confirm this message is valid, visit support.esi-estech.com 
and select News at the Menu section on the top of the page.