Cisco Model 6109 6 MHz Off-Air Reference (NTSC) Installation Guide
Chapter 4 Operation
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Modes and Settings Affecting Available Bandwidth
The USRM Server has two modes of operation with regard to what to do with
available bandwidth: Min mode or Max mode. In Min mode, only programs that
have active users are bound to QAM carriers. In Max mode, the USRM SDV Session
Manager (SdvSm) continually checks to be sure that it binds as much content as it
possibly can to bandwidth that is available in a given service group, regardless of
whether there are active users or not.
available bandwidth: Min mode or Max mode. In Min mode, only programs that
have active users are bound to QAM carriers. In Max mode, the USRM SDV Session
Manager (SdvSm) continually checks to be sure that it binds as much content as it
possibly can to bandwidth that is available in a given service group, regardless of
whether there are active users or not.
Programs without users - or "fill" programs - are bound according to the
FillSelectMode setting, which is either Priority or UserDemand.
FillSelectMode setting, which is either Priority or UserDemand.
Priority means to fill programs according to a priority value that was assigned to
each program during program creation.
each program during program creation.
User Demand means to fill programs according to which programs are tuned
first or most often.
first or most often.
In the USRM, there are two settings for Minimum Bandwidth and Maximum
Bandwidth. The first is a “global” setting which applies to all USRMs. The second is
a service group level setting. This setting overrides the global setting for a particular
service group. That is, one service group can be set up in min mode while all others
are in max mode, or vice versa.
Bandwidth. The first is a “global” setting which applies to all USRMs. The second is
a service group level setting. This setting overrides the global setting for a particular
service group. That is, one service group can be set up in min mode while all others
are in max mode, or vice versa.
For a USRM operating in a DNCS environment (supervised mode), the "global" max
mode/min mode setting is set on the DNCS and provisioned on the USRM at
startup. Also, the maximum bandwidth on the DNCS service group page, as
discussed above, is provisioned as the maximum service group bandwidth at the
service group level on the USRM. Offered Program priority is also set on the DNCS.
There are three settings: high, medium, and low, which correspond to a value of 1, 2,
or 3 on the USRM, with 1 being the highest priority.
mode/min mode setting is set on the DNCS and provisioned on the USRM at
startup. Also, the maximum bandwidth on the DNCS service group page, as
discussed above, is provisioned as the maximum service group bandwidth at the
service group level on the USRM. Offered Program priority is also set on the DNCS.
There are three settings: high, medium, and low, which correspond to a value of 1, 2,
or 3 on the USRM, with 1 being the highest priority.
For a USRM operating in a non-DNCS environment (auto mode), the "global" max
mode/min mode setting is set on the USRM webUI at Applications > SdvSm >
Configuration. For min mode, set MinActiveBandwidth to 0. For max mode, set
MinActiveBandwidth to 999.999999. Offered Programs priority is set under
Applications > SdvSm > Offered Progs Base, Priority. This value can be set between
1 and 16, with 1 being the highest priority.
mode/min mode setting is set on the USRM webUI at Applications > SdvSm >
Configuration. For min mode, set MinActiveBandwidth to 0. For max mode, set
MinActiveBandwidth to 999.999999. Offered Programs priority is set under
Applications > SdvSm > Offered Progs Base, Priority. This value can be set between
1 and 16, with 1 being the highest priority.
For non-Cisco QAMs, this value may not be 38.814. We recommend verifying the
maximum allowable bandwidth on a 256-QAM carrier with each QAM vendor. This
setting can be changed on a USRM-wide basis by a Cisco service-level user.
maximum allowable bandwidth on a 256-QAM carrier with each QAM vendor. This
setting can be changed on a USRM-wide basis by a Cisco service-level user.