Comtech EF Data DTMX5000 SpectraCast - Manual (Page 143)

Central Configuration Unit DTMX5000 IP Gateway
Rev. 1 B-7
B.5 Terminating a Session
The CCU maintains a local database of all subscribers connected to the system.
The subscribers are periodically polled to detect if they are still connected.
When the subscriber terminates a session, either in a conventional manner (by
closing the DTMX5000 application) or in an unconventional manner (for
example, by turning the computer off while the application is running), the CCU
determines from the lack of response to the polling that the subscriber has
disconnected.
The CCU, upon detecting that the subscriber has disconnected, informs the proxy
Server to remove the client from the routing table.
The CCU then proceeds to inform the DTMX5000 Gateway that the subscriber
has logged off. The DTMX5000 Gateway, in return, supplies the CCU with the
accounting information. This includes the number of bytes and packets that have
been transmitted through the DTMX5000 Gateway for this particular subscriber.
The CCU forwards this accounting information to the Billing Server. The Billing
Server compiles invoices according to the subscriber’s accumulated usage.
B.6 Installing the CCU
B.6.1 System Requirements
Prior to CCU installation procedures, check that the necessary hardware and
software requirements are met:
Requirements Description
Computer
•
Pentium II or equivalent
•
32 Megabytes of Ram
•
50 Megabytes of free disk space
Operating System Microsoft Windows NT

Ver: 4.0
In the CCU package, check for the following:
•
Software installation CD-ROM.
•
This manual.
After verifying that you have all the necessary hardware and software, you are
ready to install the CCU.