Adtran 604 User Manual

Total Access 600 Series System Manual

Section 4  User Interface Guide

61200624L1-1B

© 2004 ADTRAN, Inc.

101

Configure the 

 parameters for these menus are identical regardless of network interface. 

Therefore, the interface is denoted by 

.

Configure the 

 mode. Choices are 

and 

 (def). Selecting 

 configures the 

interface for Asynchronous Transfer Mode signaling on Layer 2. Selecting 

 configures the 

interface for Copper Mountain frame relay signaling on Layer 2. 

Asynchronous Transfer Mode allocates bandwidth on demand, automatically adjusting the network 
capacity to meet the system needs. Fixed-length cells (53 octet) require lower processing overhead and 
allow higher transmission speeds than traditional packet switching methods. ATM uses five octet headers 
in each fifty-three octet cell to match cells with specific virtual channels to which they belong.

Copper Mountain Frame Relay (FRE) is a data link layer protocol that uses Frame Relay instead of ATM 
on the subscriber loop. Frame relay is a switched layer protocol that handles virtual circuits using 
High-Level Data Link Control (HDLC) encapsulation. Frame Relay uses statistical multiplexing as 
opposed to time-division-multiplexing many logical connections over a single physical link.

Configure the 

 parameters and view the status of the T1 interface using ATM protocol from 

this menu.

Configure the 

 parameters for the T1 interface using ATM protocol.

Use the 

 menu to set the parameters listed below.

The 

 format must be configured for either 

 or 

. Configuring 

this setting incorrectly for a particular circuit will cause poor performance at the ATM Layer. The default 
is 

.