Cisco Explorer Series Staging Manual page 16

Chapter 1 The Staging Process
DhctInstantHit
The DhctInstantHit transaction, sometimes called an "instant hit," initiates the
transmission of all existing EMMs to the device. The DNCS and some billing systems
can send an instant hit. During a DhctInstantHit, the DNCS transmits the EMMs for
the device.
You should send a DhctInstantHit if the ModifyDhctConfiguration transaction was
started before the device was ready to receive the EMMs (for example, the device
had not finished downloading software).
Using an instant hit to send EMMs to the device is only effective when the staging
EMMs are present on the DNCS. In most cases, this means that the device must be
installed and ready to receive EMMs within 30 days of the EMMs being built as a
result of the ModifyDHCTConfiguration transaction (the "EMM window").
Note: The number of days for the EMM window is configurable in the DNCS; 30
days is the default value.
If you do not send the EMMs within the 30-day window, you will need to use the
ModifyDHCTConfig transaction to rebuild the staging EMMs. See
ModifyDhctConfiguration (on page 5) for more information.
Fast Refresh List
The Fast Refresh List is a queue of EMMs that a data carousel within the BFS
distributes. A data carousel transports data from the BFS server to the device. Every
5 minutes, the DNCS searches for devices that have the following settings and adds
them to the Fast Refresh List:
Fast Refresh List enabled

Admin Status set either to In Service Two Way or In Service One Way (set by the

ModifyDhctAdminStatus transaction)
During the staging process, the billing system sends the ModifyDhctConfiguration
transaction to the DNCS to add a DHCT to the Fast Refresh List. When the DNCS
rebuilds the Fast Refresh List, the data carousel continuously sends PowerKEY
information to the new DHCTs.
If a DHCT boots and an Entitlement Agent (EA) is not present, the DHCT tunes to
the inband QAM data channel and attempts for 5 minutes to receive its PowerKEY
information. The 5-minute tuner lockout begins after the DHCT receives its SI and
BFS data. The Fast Refresh List has been rebuilt with the PowerKEY information for
the DHCT, the DHCT receives its information during this time.
EMMs remain on the Fast Refresh List for 48 hours unless you send a
ModifyDhctConfiguration transaction to remove the DHCTs from the Fast Refresh
List.
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