Cisco Headend System Release 2.5 安装指南

78-738190-01 Rev B 

SR 2.5 and SR 3.5 UniPack Pre-Upgrade Procedures 

1-1 

This chapter contains procedures that you will follow to prepare the system you are 

upgrading for the SR 2.5 or SR 3.5 upgrade.  

Note these important upgrade requirements: 
• 

Systems that upgrade to SR 2.5 or SR 3.5 using the UniPack must currently be 

operating with system software from SR 2.2/SR 3.2, SR 2.4/SR 3.4, or SR 2.5/SR 

3.5. 

• 

Cisco field service engineers or the system operator must have already installed 

the DNCS Utilities software onto the DNCS. Refer to DBDS Utilities Installation 

Instructions and DNCS Utilities User’s Guide for instructions on installing and 

executing the DNCS Utilities. 

To ensure a successful system upgrade, it is important that you follow the 

instructions described in this chapter in the order given. 

Cisco engineers have designed the SR 2.5 and SR 3.5 upgrade so that it can be 

completed while you are within one maintenance window. 
Post upgrade procedures may involve resetting the QAM and MQAM modulators. 

Reset time is approximately 4 or 5 minutes per modulator. Cisco recommends that 

you never reset more than four modulators at once.  

Interactive services will not be available while you are within the SR 2.5 and SR 3.5 

maintenance window and after DNCS processes are stopped. 

Note these important points about third-party applications: 
• 

Identify all third-party applications currently loaded onto either the DNCS or the 

Application Server. 

• 

Contact all third-party vendors before the upgrade to SR 2.5 or SR 3.5. Inform the 

vendor that you are upgrading to SR 2.5 or SR 3.5 and determine whether you 

need to complete any steps related to the third-party application before or after the 

upgrade.