<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=utf-8">
<META content="MSHTML 6.00.2900.3157" name=GENERATOR></HEAD>
<BODY style="MARGIN: 4px 4px 1px; FONT: 10pt Tahoma">
<DIV> </DIV>
<DIV> Looking for some advice for the best way to do Call Manager upgrades to minimize system disruptions. From a recent ES doc:</DIV>
<DIV> </DIV>
<DIV>"You can minimize call-processing interruptions if you register all devices<BR>to servers that are running the same version of Cisco CallManager during the<BR>entire upgrade process; i.e., you register all devices to the backup Cisco<BR>CallManager servers or the primary Cisco CallManager servers, but not to<BR>both types of servers."</DIV>
<DIV> </DIV>
<DIV> I understand what the ES doc is saying what I am not sure about is the best practice to ensure that all devices stay registered on the backup or primary servers during the upgrade. Should you manipulate your Call Manager groups during the upgrade?
<DIV> </DIV>
<DIV> For instance all of our devices are registered to Subscribers A, B, C, & D. We have two back up subscribers X & Y. Do we:</DIV>
<DIV> </DIV>
<DIV>1. Upgrade the Publisher.</DIV>
<DIV>2. Upgrade X & Y</DIV>
<DIV>3. Change our Call Manager Groups so X & Y subs are the primary.</DIV>
<DIV>4. Reset all devices so they re-register to X & Y.</DIV>
<DIV>5. Upgrade A, B, C, & D.</DIV>
<DIV>6. Change Call Manager groups so A, B, C, & D are primary again.</DIV>
<DIV>7. Reset devices.</DIV><BR></DIV>
<DIV> </DIV>
<DIV> </DIV>Thanks!<BR><BR>Steve Casper<BR>Voice Technologies<BR>M&T Bank<BR>(410) 347-6026
<P>************************************<br>
This email may contain privileged and/or confidential information that is intended solely for the use of the addressee. If you are not the intended recipient or entity, you are strictly prohibited from disclosing, copying, distributing or using any of the information contained in the transmission. If you received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. This communication may contain nonpublic personal information about consumers subject to the restrictions of the Gramm-Leach-Bliley Act and the Sarbanes-Oxley Act. You may not directly or indirectly reuse or disclose such information for any purpose other than to provide the services for which you are receiving the information.<br>
There are risks associated with the use of electronic transmission. The sender of this information does not control the method of transmittal or service providers and assumes no duty or obligation for the security, receipt, or third party interception of this transmission.<br>
************************************<br>
</P></BODY></HTML>