Comtech EF Data DTMX5000 SpectraCast - Manual (Page 140)

Central Configuration Unit DTMX5000 IP Gateway
B-4 Rev. 1
B.3.3 Authentication Server Allows Access
Authentication is performed through the submission of the subscriber’s unique
user name and encrypted password. Only the subscriber and the RADIUS
Authentication Server know this password. If the subscriber is allowed access,
the CCU receives confirmation from the Authentication Server. The
Authentication Server attaches to its confirmation message the QoS (Quality of
Service) Level, the subsriber’s Group ID and the multicast channels to which the
subscriber is entitled.
Upon receiving confirmation from the Authentication Serve, The CCU contacts
the DTMX5000 Gateway.
B.3.4 CCU Contacts DTMX5000 Gateway
The CCU relays the following subscriber’s parameters to the DTMX5000Gateway:
IP Address The DTMX5000 Gateway identifies the DTMX5000 subscriber’s data
by this address.
Media Access and Control
(MAC) Address Enables the DTMX5000 Gateway to encapsulate TCP/IP packets with
this MAC address.
Encryption Ke Enables the DTMX5000 Gateway to encrypt date sent over the DVB
LAN.
Quality of Service (QoS) Level The QoS parameter determines the bandwidth share the subscriber
receives, according to the level of quality specified in the individual
subscription fees. The CCU obtains the Quality of Service Level for
each subscriber from the external authentication system (a RADIUS
Authentication Server).
Accounting Information The DTMX5000 Gateway counts the amount of data received by each
subscriber. This accounting information is then used to submit billing,
for processing by the RADIUS Billing Server.
Group ID Enables the DTMX5000 Gateway to recognize the group to which the
subscriber belongs. Groups enable logical aggregation of the date of
groups of users or multicast users under separate PIDs.
Multicast Group Information The CCU receives a list from the RADIUS Server of multicast channels
to which a subscriber is entitled. Based on this list, the CCU sends the
appropriate encryption keys to the client.
Refer to Client Parameters Sent from the RADIUS Authentication Server.
B.3.5 CCU Contacts Billing Server
The CCU contacts the RADIUS Billing Server and notifies it that a subscriber
has started a session. The Billing system accumulates the data necessary for
submitting invoices to a subscriber, based on either time or bandwidth usage.
For more information about the Billing Serve, refer to the RADIUS Billing
Server documentation.