Netopia 3346N-ENT User Guide (en)

WAN Configuration   2-5
Usually, the default AutoSense will detect the type and adjust itself accordingly. If you want to set it 
yourself, and you know the type of wiring you have, choose either Tip/Ring (Inner Pair) or A/A1 (Outer Pair) 
from the pop-up menu.
Select Data Link Encapsulation and press Return. The pop-up menu will offer you the choice of PPP or 
ATM Circuit Configuration
On ADSL WAN inter faces, the Asynchronous Transfer Mode (ATM) connection between the router and the 
central office equipment (DSLAM) is divided logically into one or more vir tual circuits (VCs). A vir tual circuit may 
be either a permanent vir tual circuit (PVC) or a switched vir tual circuit (SVC). Netopia Routers suppor t PVCs.
VCs are identified by a Vir tual Path Identifier (VPI) and Vir tual Channel Identifier (VCI). A VPI is an 8-bit value 
between 0 and 255, inclusive, while a VCI is a 16-bit value between 0 and 65535, inclusive.
Circuits suppor t attributes in addition to their VPI and VCI values. When configuring a circuit, you can 
specify an optional circuit name of up to 14 characters. The circuit name is used only to identify the circuit 
for management purposes as a convenience to aid in selecting circuits from lists. The default circuit name 
is “Circuit <n>”, where <n> is some number between one and eight corresponding to the circuit’s position 
in the list of up to eight circuits.
You can also individually enable or disable a circuit without deleting it. This is useful for temporarily 
removing a circuit without losing the configured attributes.
In order to function, each circuit must be bound to a Connection Profile or to the Default Profile. Among 
other attributes, the profile binding specifies the IP addressing information for use on the circuit. Each 
circuit must be bound to a distinct Connection Profile.
ATM VPI/VCI Autodetection. You can bind multiple circuits to the same Connection Profile. Netopia Firmware 
Version 8.6.1 allows you to have a standard configuration that uses, for example, four VCs (0/35, 0/38, 8/35, 
8/38) pointing to the same profile.
The unit will now automatically select the active VC on networks with a VPI/VCI of any of these four values 
without any custom configuration of the unit. You must, however, manually create these VCs and associate 
them with the profile you desire.
You configure Vir tual Circuits in the Add/Change Circuit screen.
ATM Circuits