Cisco Headend System Release 2.7 Installation Guide

 

10 

4023372 Rev B 

Before you upgrade to MQAM 2.6.18, be sure that your system meets the criteria 

specified in System Release Compatibility and Prerequisites (on page 4) and 

Application Platform Release Dependencies (on page 5). 
If you will not be downloading the MQAM software from our File Transfer Protocol 

(FTP) site, make sure that you have obtained the CD, MQAM V2.6.18, part number 

4021953. 

 

When upgrading MQAMs with the new software, consider the following tasks and 

the amount of time required for each: 

 

Completing pre-upgrade tasks takes from 30 to 45 minutes. 

 

If you are upgrading from an FTP site, allow an additional 10 to 15 minutes to 

download the software from the FTP site. The speed of the connection and the 

size of the files will determine the actual download time. 

 

Downloading new software to the MQAM takes approximately 5 minutes for 

each modulator. 

 

For MQAMs that carry broadcast sessions, the DNCS will restart the sessions 

after the MQAMs load new software. 

 

For MQAMs that carry VOD sessions, only those sessions that are determined to 

be active will be restarted. Because subscribers may tune away when the MQAM 

reboots, the total number of recovered sessions may not match the original 

number of sessions on the MQAMs. 

Note: It is not necessary to rebuild non-VOD sessions on the MQAMs that you 

upgrade. The non-VOD sessions are rebuilt automatically after the new software is 

downloaded to the MQAM. 

 

When MQAMs are reset (rebooted) during the upgrade, the services they carry are 

interrupted. DHCTs will show a frozen picture or black screen until the upgrade is 

complete and the DNCS has restarted all of the active sessions on the MQAM.