ADTRAN 600R - Manual (Page 103)

Total Access 600 Series System Manual Section 4 User Interface Guide
61200624L1-1B © 2004 ADTRAN, Inc. 101
L2 P
ROTOCOL
(ATM F
IRMWARE
) – N
ETWORK
(NET) I
NTERFACE
Configure the L2 P ROTOCOL
parameters for these menus are identical regardless of network interface.
Therefore, the interface is denoted by NET .
L2 P ROTOCOL (ATM – NET) > P ROTOCOL
Configure the L2 P ROTOCOL
mode. Choices are ATM and C U MTN (def). Selecting ATM configures the
interface for Asynchronous Transfer Mode signaling on Layer 2. Selecting C U MTN configures the
interface for Copper Mountain frame relay signaling on Layer 2.
L2 P
ROTOCOL
(ATM – NET) > P
ROTOCOL
> ATM
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.
L2 P ROTOCOL (ATM – NET) > P ROTOCOL > C U M TN FRE
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.
L2 P
ROTOCOL
(ATM F
IRMWARE
) – NET> ATM
Configure the L2 P ROTOCOL
parameters and view the status of the T1 interface using ATM protocol from
this menu.
L2 P
ROTOCOL
(ATM–NET–ATM) > C
ONFIG
Configure the L2 P ROTOCOL
parameters for the T1 interface using ATM protocol.
L2 P
ROTOCOL
(ATM–NET–ATM) > C
ONFIG
> ATM C
ONFIG
Use the ATM C ONFIG
menu to set the parameters listed below.
L2 P
ROTOCOL
(ATM–NET–ATM) > C
ONFIG
> ATM C
ONFIG
> I
DLE
C
ELLS
The I DLE C ELLS
format must be configured for either ATM F ORUM (U NASSIGNED ) or ITU (I DLE ) . Configuring
this setting incorrectly for a particular circuit will cause poor performance at the ATM Layer. The default
is
ATM F ORUM (U NASSIGNED ) .