Cisco Headend System Release 2.5 Release Notes

4023675 Rev B 

 

5 

 

This section provides information to help you prepare for the upgrade to DTACS 1.2. 
Please read this entire section before you upgrade. 

 

This section contains information that can help system operators plan an upgrade to 
DTACS 1.2. 

 

The entire upgrade to DTACS 1.2 must be completed within a single maintenance 
window that usually starts around midnight. A few pre-upgrade procedures, 
consisting mainly of system checks, backups, and various operations upon the 
metadevices of the DNCS, can be completed before the maintenance window begins. 

Cisco engineers have determined that a typical site can be upgraded within one 
maintenance window. See Scheduling Requirements (on page 6) for additional 
details. 

 

Note these important upgrade requirements: 

 

To perform the software upgrade, the DTACS must currently be operating 
DTACS 1.1 or later. 

 

The upgrade software is on DVD. For upgrade instructions, refer to the DTACS 
1.2 Installation and Operation Guide (part number 4036705). Rollback procedures 
and software are also provided in the event that the upgrade is unsuccessful. 

 

Some tasks must be performed on the DNCS (Digital Network Control System). 
Refer to the DTACS 1.2 Installation and Operation Guide (part number 4036705) for 
details.  

 

Interactive services will not be available during the maintenance window.