Comtech EF Data DTMX5000 SpectraCast - Manual (Page 141)

Central Configuration Unit DTMX5000 IP Gateway
Rev. 1 B-5
B.3.6 CCU Contacts Proxy Server
The Proxy Server acts as an intermediary between the subscriber and the Internet.
Information requests originating from the subscriber pass through the proxy
Serve on their way to the Internet. In the reverse direction, the Proxy Server
routes the information from the Internet, towards the subscriber, through the
DTMX5000.
The CCU contacts the selected Proxy Server in order to update the Proxy
Server’s Routing Table with the new subscriber’s IP address. This enables the
Proxy Server to route information from the Internet towards the subscriber. To
support the use of Proxy Servers, the subscriber’s browser proxy settings should
be set to the IP address of a Proxy Server.
Refer to the DR5000 Satellite IP RouterUser’s Guide for further information.
B.3.7 CCU Responds to DTMX5000 Application
As soon as the CCU has successfully completed contacting the Authentication
Server, the Billing Server, the DTMX5000, and the Proxy Server, it responds to
the connecting DTMX5000 application.
The CCU includes the following parameters in its response to the connecting
DTMX5000 application. These parameters are required by the DTMX5000
application in order to successfully receive and interpret the broadcast:
PID The MPEG-2 program ID of Group 1 in the DTMX5000..
Frequency: Broadcast frequency
Symbol Rate Broadcast symbol rate
Polarity
Satellite broadcast polarity. Available for SatStream clients only.
Range Satellite broadcast range which sets the subscriber’s antennas’ LNB for
higher or lower bandwidth.
Modulation Type The modulation type used.
Note: The above parameters are taken from the DTMX5000 properties in the
System Parameters dialog box (see Configuring the CCU).
The CCU sends the DTMX5000 application a list of the CCUs in the system.
The DTMX5000 application uses this list to implement CCU load-balancing.
Each time the DTMX5000 application opens a new session, it randomly chooses
a different CCU, thus distributing the load over all the CCUs in the system. The
list sent is taken from the CCU Server branch in the System Parameters dialog
box (see Configuring the CCU).