Cellular Configuration Screen (3G) - ZyXEL Communications ISG50-ISDN User Manual

Table 68 Configuration > Network > Interface > PPP > Add (continued)
LABEL
MTU
Connectivity Check
Enable
Connectivity
Check
Check Method
Check Period
Check Timeout
Check Fail
Tolerance
Check Default
Gateway
Check this
address
Check Port
Related Setting
Configure WAN
TRUNK
Policy Route
OK
Cancel

12.5 Cellular Configuration Screen (3G)

3G (Third Generation) is a digital, packet-switched wireless technology. Bandwidth usage is
optimized as multiple users share the same channel and bandwidth is only allocated to users when
they send data. It allows fast transfer of voice and non-voice data and provides broadband Internet
access to mobile devices.
Note: The actual data rate you obtain varies depending on the 3G card you use, the
signal strength to the service provider's base station, and so on.
You can configure how the ISG50's 3G device connects to a network (refer to
page 253):
ISG50 User's Guide
DESCRIPTION
Maximum Transmission Unit. Type the maximum size of each data packet, in bytes, that
can move through this interface. If a larger packet arrives, the ISG50 divides it into
smaller fragments. Allowed values are 576 - 1492. Usually, this value is 1492.
The interface can regularly check the connection to the gateway you specified to make
sure it is still available. You specify how often the interface checks the connection, how
long to wait for a response before the attempt is a failure, and how many consecutive
failures are required before the ISG50 stops routing to the gateway. The ISG50
resumes routing to the gateway the first time the gateway passes the connectivity
check.
Select this to turn on the connection check.
Select the method that the gateway allows.
Select icmp to have the ISG50 regularly ping the gateway you specify to make sure it
is still available.
Select tcp to have the ISG50 regularly perform a TCP handshake with the gateway you
specify to make sure it is still available.
Enter the number of seconds between connection check attempts.
Enter the number of seconds to wait for a response before the attempt is a failure.
Enter the number of consecutive failures before the ISG50 stops routing through the
gateway.
Select this to use the default gateway for the connectivity check.
Select this to specify a domain name or IP address for the connectivity check. Enter
that domain name or IP address in the field next to it.
This field only displays when you set the Check Method to tcp. Specify the port
number to use for a TCP connectivity check.
Click WAN TRUNK to go to a screen where you can configure the interface as part of a
WAN trunk for load balancing.
Click Policy Route to go to the screen where you can manually configure a policy route
to associate traffic with this interface.
Click OK to save your changes back to the ISG50.
Click Cancel to exit this screen without saving.
Chapter 12 Interfaces
Section 12.5.1 on
251