User`s guide

Chapter 4 Broadband
ericom D1000 modem User’s Guide
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4.4 The 3G Backup Screen
Use this screen to configure your 3G settings. Click Network Setting > Broadband > 3G
Backup.
Note: The actual data rate you obtain varies depending the 3G card you use, the signal
strength to the service provider’s base station, and so on.
Multicast Internet Group Multicast Protocol (IGMP) is a network-layer protocol used to establish
membership in a multicast group. The Device supports IGMP-v1, IGMP-v2 and IGMP-
v3. Select None to disable it.
ATM QoS
ATM QoS Type 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 nrtVBR (Variable Bit Rate-non Real Time) or rtVBR (Variable Bit
Rate-Real Time) for bursty traffic and bandwidth sharing with other applications.
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.
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.
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.
MTU
MTU 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, the MTU is 100-1500.
Apply Click this to save your changes.
Cancel Click this to restore your previously saved settings.
Table 5 Network Setting > Broadband > More Connections: Edit (continued)
LABEL DESCRIPTION