ADTRAN AOS Version R10.1.0 Command Reference Manual page 8

Command Reference Guide
3. RAM - Random Access Memory
RAM is the computer memory that functions as the working memory of your AOS unit. When the unit
is on, the RAM provides memory for caching, packet buffering, holding routing tables, and housing
the running operating system. When the unit is first powered on, RAM executes the application codes
from flash memory and the startup configurations from nonvolatile random access memory
(NVRAM), and when the unit is powered off or reset, RAM loses all data.
4. NVRAM - Nonvolatile Random Access Memory
NVRAM is the general name for any RAM that does not lose its information at power down (for
example, flash memory). In this case, NVRAM has a separate memory function than the flash memory
and is used to house the unit's startup configurations.
5. Interfaces
Interface is the term used to describe how your unit is connected with its outside environment. There
are a variety of interface categories, as well as interface types. Interface categories include line
interfaces, physical interfaces, and virtual interfaces.
• Line interfaces describe the way you are communicating with your unit (for example, by console
or Telnet).
• Physical interfaces describe the way your unit is physically connected to other units or devices (for
example, via Ethernet, T3, serial, or asymmetric digital subscriber line (ADSL)).
• Virtual interfaces describe the way your unit receives information, whether by Frame Relay,
Point-to-Point Protocol (PPP), virtual local area network (VLAN), or asynchronous transfer mode
(ATM), to name a few.
The user can configure a unit's interfaces through the interface command sets (refer to
Command Sets on page
60000CRG0-35E
14).
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Internal Parts
Configuration
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