Me R189, Руководство пользователя

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During alert processing, the Operation Log will log the success or failure of the
DVS644 forwarding/origination action per client.
Note: Every client configuration
is used for whichever action of alert forwarding and alert origination currently
enabled.
Various information fields must be configured to identify and correctly
communicate to the DVS-644 client. The most basic fields are the IP address and
port. Enter these according to the specific DVS-644 client. Often this is an MPEG-2
multiplexor, such as a Stream Encryptor Modulator, serving a defined set of digital
cable channels. Then decide if In-Band or Out-of-Band (OOB) communication will
be used and select the checkbox appropriately. Based upon whether In-Band or Out-
of-Band is chosen for the client, set the Details Major/Minor number or the Details
OOB channel. This details channel is where the highest priority force tune alerts are
sent. EAN/EAT will always cause a force tune to this channel. By using the
Alert
Type Priority Selection interface, other EAS alert codes can have the associated
priority number configured based upon a severity rating per client. DVS644/SCTE
18 provides for 16 priority values, however reserved uses for most values mean that
in practice, priority values are 0,3,7,11 and 15, with 15 being the highest priority
alerts. The priority of 0 has a special meaning. An alert sent with 0 priority will
establish a new set-top box or TV sequence number. The sequence number is
incremented (modulo 32) whenever an alert is sent with updated information. The
One-Net supports this reset mode by allowing an alert to be set to 0 priority. This
setting should only be used for one alert, and then changed to 1-15. There is also a
field to extend the alert duration past the default One-Net audio duration. Keep in
mind that the maximum allowed time for a DVS644/SCTE 18 message is 120
seconds. The One-Net also provides an interface to configure channel exceptions as
needed. These are channels that will ignore the alert. The interface is shown enabled
in the illustration above. It is enabled/disabled using a checkbox toggle. Another
useful feature the One-Net provides is an interface for configuring and sending a
private descriptor field.