ZyXEL Communications P-660HN-51 User Manual page 51

The following table describes the labels in this screen.
Table 6 Broadband: Add/Edit: Routing Mode
LABEL DESCRIPTION
General
Active Select this to activate the WAN configuration settings.
Name Specify a descriptive name of up to 15 alphanumeric characters for this
connection.
Mode Select Routing (default) from the drop-down list box if your ISP give you one IP
address only and you want multiple computers to share an Internet account.
Encapsulation Select the method of encapsulation used by your ISP from the drop-down list box.
This option is available only when you select Routing in the Mode field.
The choices are PPPoE, PPPoA, IPoE and IPoA.
ATM PVC Configuration
VPI The valid range for the VPI is 0 to 255. Enter the VPI assigned to you.
VCI The valid range for the VCI is 32 to 65535 (0 to 31 is reserved for local management
of ATM traffic). Enter the VCI assigned to you.
Encapsulation Select the method of multiplexing used by your ISP from the drop-down list box.
Mode Choices are:
• LLC/SNAP-BRIDGING: In LCC encapsulation, bridged PDUs are encapsulated by
identifying the type of the bridged media in the SNAP header. This is available
only when you select IPoE or PPPoE in the Select DSL Link Type field.
• VC/MUX: In VC multiplexing, each protocol is carried on a single ATM virtual
circuit (VC). To transport multiple protocols, the Zyxel Device needs separate
VCs. There is a binding between a VC and the type of the network protocol
carried on the VC. This reduces payload overhead since there is no need to
carry protocol information in each Protocol Data Unit (PDU) payload.
• LLC/ENCAPSULATION: More than one protocol can be carried over the same
VC. This is available only when you select PPPoA in the Encapsulation field.
• LLC/SNAP-ROUTING: In LCC encapsulation, an IEEE 802.2 Logical Link Control
(LLC) header is prefixed to each routed PDU to identify the PDUs. The LCC
header can be followed by an IEEE 802.1a SubNetwork Attachment Point
(SNAP) header. This is available only when you select IPoA in the Encapsulation
field.
Service Category Select UBR Without PCR or UBR With PCR for applications that are non-time sensitive,
such as e-mail.
Select CBR (Continuous Bit Rate) to specify fixed (always-on) bandwidth for voice or
data traffic.
Select Non Realtime VBR (non real-time Variable Bit Rate) for connections that do
not require closely controlled delay and delay variation.
Select Realtime VBR (real-time Variable Bit Rate) for applications with bursty
connections that require closely controlled delay and delay variation.
Peak Cell Rate Divide the DSL line rate (bps) by 424 (the size of an ATM cell) to find the Peak Cell
Rate (PCR). This is the maximum rate at which the sender can send cells. Type the
PCR here.This field is not available when you select UBR Without PCR.
Sustain Cell Rate The Sustain Cell Rate (SCR) sets the average cell rate (long-term) that can be
transmitted. Type the SCR, which must be less than the PCR. Note that system
default is 0 cells/sec.
This field is available only when you select Non Realtime VBR or Realtime VBR.
Maximum Burst Size Maximum Burst Size (MBS) refers to the maximum number of cells that can be sent at
the peak rate. Type the MBS, which is less than 65535.
This field is available only when you select Non Realtime VBR or Realtime VBR.
PPP Information This is available only when you select PPPoE or PPPoA in the Mode field.
Chapter 5 Broadband
P-660HN-51 User's Guide
51