The More Connections Screen - ZyXEL Communications AMG1202-T10A User Manual

Chapter 6 WAN Setup
Table 17 Network > WAN > Internet Access Setup: Advanced Setup (continued)
LABEL
Multicast
ATM QoS
ATM QoS Type
Peak Cell Rate
Sustain Cell
Rate
Maximum Burst
Size
MTU
MTU
Back
Apply
Cancel

6.3 The More Connections Screen

The ZyXEL Device allows you to configure more than one Internet access connection. To configure
additional Internet access connections click Network > WAN > More Connections. The screen
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DESCRIPTION
Multicast packets are sent to a group of computers on the LAN and are an
alternative to unicast packets (packets sent to one computer) and broadcast
packets (packets sent to every computer).
Internet Group Multicast Protocol (IGMP) is a network-layer protocol used to
establish membership in a multicast group. The ZyXEL Device supports IGMP-
v1, IGMP-v2 and IGMP-v3. Select None to disable it.
Select CBR (Continuous Bit Rate) to specify fixed (always-on) bandwidth for
voice or data traffic. Select UBR (Unspecified Bit Rate) for applications that are
non-time sensitive, such as e-mail. Select rtVBR (real-time Variable Bit Rate)
type for applications with bursty connections that require closely controlled
delay and delay variation. Select nrtVBR (non real-time Variable Bit Rate) type
for connections that do not require closely controlled delay and delay variation.
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.
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.
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.
The Maximum Transmission Unit (MTU) defines the size of the largest packet
allowed on an interface or connection. Enter the MTU in this field.
For ENET ENCAP, the MTU value is 1500.
For PPPoE, the MTU value is 1492.
For PPPoA and RFC 1483, the MTU is 65535.
Click this to return to the previous screen without saving.
Click this to save your changes.
Click this to restore your previously saved settings.
AMG1202-T10A User's Guide