Cisco Model D9479 Gigabit QAM Modulator Installation Guide

 

8 

78-4024239-01 Rev B 

Before you upgrade, be sure that your system meets the criteria specified in What 

Are the Site Requirements? (on page 2). 
If you will not be downloading the software from the Cisco File Transfer Protocol 

(FTP) site, make sure that you have obtained the CD, GoQAM Software V1.1.3, part 

number 4011024. 

 

When upgrading the 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 takes approximately 5 minutes for each modulator. 

 

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

after loading the new software. 

 

For modulators that carry VOD sessions, only those sessions that are determined 

to be active will be restarted. Because subscribers may tune away during the time 

when the modulator reboots, the total number of recovered sessions may not 

match the original number of sessions on the modulators. 

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

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

downloaded. 

 

When modulators 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 modulator.