Cisco DNCS System Release 2.7 3.7 4.2 Guia Da Instalação

 

94 

78-4003052-01 Rev G 

Using the frequencies in this appendix vastly improves the speed and performance 

of the initial staging process.  
After a DHCT has been successfully downloaded using the CVT download method, 

the DHCT retains the frequency of the carousel for subsequent downloads and, 

therefore, does not search for the frequency again. 

 

Cisco strongly recommends that you configure at least one QAM modulator to use 

one of the recommended frequencies shown in the following table. 

36 

295.75 MHz 

297.0 MHz 

61 

445.75 MHz 

447.0 MHz 

77 

541.75 MHz 

543.0 MHz 

79 

553.75 MHz 

555.0 MHz 

101 

655.75 MHz 

657.0 MHz 

Important!     

 

These are the channels and frequencies that the DHCT checks first during 

staging. If you use other frequencies, then the DHCT is forced to scan all possible 

frequencies until it finds the correct frequency. 

 

Although additional scanning increases the time needed to download software, 

the CVT download method operates at all STD, IRC, and HRC frequencies. 

 

Because the CVT information is loaded into all QAMs, or those selected as 

staging bridges, the selected QAM does not need to be the QAM used to carry 

the BFS sessions. You may select from any of the QAMs configured in your 

network.