Cisco Headend Digital Broadband Delivery System

 

20 

4003389 Rev B 

This section provides guidance for establishing a sequence to follow when 
downloading QAM software version 2.4 onto more than one QAM modulator. 

Note: For more information about the DNCS and operating the DNCS software, 
refer to the DNCS Online Help for your system. 

 

 

If downloading QAM software version 2.4 to more than one QAM modulator, 
download the software to one modulator and verify its functionality before 
attempting to download software to another modulator. Verifying the 
functionality of one modulator at a time enables you to better isolate any 
failures that may occur. 

The order in which you download QAM software onto QAM modulators allows you 
to verify that the download is successful before proceeding. Follow these guidelines 
to establish an order in which to download QAM software version 2.4 to QAM 
modulators. The method that you follow depends on the type of sessions that the 
QAM modulator carries (xOD/VOD sessions or broadcast sessions). 

When upgrading QAM modulators that carry xOD or VOD sessions, we suggest that 
you upgrade all modulators in one hub and verify the functionality of those 
modulators before upgrading modulators in another hub. 

Use the following guidelines to determine the order in which to upgrade modulators 
within a hub: 

 

If any QAM modulators act as spares, start by downloading QAM software 
version 2.4 on these modulators. 

 

If your system does not have a spare QAM modulator, download QAM software 
version 2.4 on the modulator carrying the fewest number of sessions. 

 

Continue downloading the software to modulators by working your way up to 
the modulator carrying the most sessions.