Comtech EF Data DTMX5000 SpectraCast - Manual (Page 18)

Introduction DTMX5000 IP Gateway
1–4 Rev. 1
1.2.1 Proxy Servers
At data request, the requested packet is routed to the proxy server. The proxy server acts
as an intermediary between the final destination and the subscriber. The proxy server
retrieves the data from its cache or the Internet, and returns the requested data to the
subscriber via the DTMX5000.
1.2.2 Central Configuration Unit
The Central Configuration Unit (CCU) can control the DTMX5000. The CCU is an
application running on a Windows NT

station at the hub. This application monitors
subscriber’s activities, selects the proxy server for each session, maintains the routing
table on the proxy table server, and interacts with external billing and authentication
systems. (See Appendix B.)
As the subscriber logs On, the CCU notifies the DTMX5000 of the subscriber’s:
•
Quality of Server (QoS)
•
Group Identification (ID)
•
Encryption Parameters
When the subscriber logs Off, the CCU updates the DTMX5000 and collects the
accounting information accumulated by the DTMX5000 for the subscriber. The CCU
connects to the Control and Management (C&M) LAN.
•
If the C&M LAN is protected by a Firewall, the appropriate actions must be
taken to ensure connection between the CCU and the server (RIP2 messages
from the CCU should be able to reach the proxy server) and between the CCU
and the clients.
•
For additional information, refer to the CCU User’s Manual.
1.2.3 Network Management System
The DTMX5000 is an SNMP V2 client and can be fully controlled by any ANMP-based
NMS application. The MIB parameters include the unit’s configuration, statistic and
diagnostic information. By editing and viewing these parameters, the service provider can
configure and control the DTMX5000.
The NMS also enables the service provider to view and monitor realtime performance
statistics, for example: Client information, memory usage, and packet information. The
statistics can then be evaluated to enhance the QoS offered to subscribers.