System information

4821-A2-GB21-00 July 2004 1-1
1
System Concepts
Active Configurations
The system has two configuration memories:
 Running configuration (RAM)
 Startup configuration (NVRAM)
The system operates based on the settings in the running configuration memory
(RAM). This configuration may or may not be the same as the configuration in
NVRAM. All configuration changes made through any of the user interfaces (CLI,
web interface, NMS) are stored only in the running configuration area. You must
explicitly copy the Running configuration to the Startup configuration.
Multiple users are permitted to be in the configuration mode at the same time, on
all three interfaces. If any of the users perform a save command, then the
configuration changes made by all the users will be saved to the startup
configuration.
System Terminology
The following terms are used in this manual and the product’s user interfaces.
Port
A port is one of the physical interfaces on the device.
These include:
 ALARM RELAY
 CONSOLE
 DSL Ports 1–24
 MANAGEMENT (Port 1)
 UPLINK (Port 2 or Port 3)
 DOWNLINK (Port 2 or Port 3)