Cisco Headend System Release 2.7 Guide De Montage
Chapter 2 Upgrading the Software
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4023372 Rev B
Upgrade Process Overview
Before You Begin
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
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.
Time to Complete
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.
Subscriber Impact
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.