Comtech EF Data DTMX5000 SpectraCast - Manual (Page 137)

Rev. 1 B-1
B
APPENDIX B.
CENTRAL
CONFIGURATION UNIT
This appendix describes the Central Configuration Unit (CCU) is the access and
configuration controller for clients. This appendix provides an overview of the
CCU’s central role, starting when a subscriber logs on and starts a session,
through the request and receipt of information, and ending with the termination
of the session.
B.1 Overview
The CCU runs on a Windows NT workstation, which is located at the hub. The
CCU is responsible for the following activities:
•
Authentication of clients (with the help of an external authentication
system – a RADIUS Authentication Server).
•
Automatic parameter configuration of the modem at the client’s PC.
•
Dynamic routing of clients’ packets towards the Gateway, at the hub.
•
Transferal of clients’ activity statistics from the Gateway to the RADIUS
Billing Server.
•
Load-balancing, to distribute clients evenly among Gateways.
•
Quality of Service (QoS) allocation. Quality of Service determines how
much bandwidth share each subscriber receives. The specific
information about the Quality of Service that each subscriber is entitled
to receive comes from the external authentication system (a RADIUS
Authentication Server).