RuggedCom RuggedRouter RX1100 - Manual (Page 110)

13. Configuring PPP And The Cellular Modem
Revision 1.14.3 110 RX1000/RX1100™
13. Configuring PPP And The Cellular Modem
13.1. Introduction
This chapter familiarizes the user with:
• Configuring the cellular modem
• Configuring the PPP client
• Viewing connection status
13.1.1. PPP and Cellular Modem Fundamentals
RuggedRouter® may be equipped with an internal cellular modem instead of the land-line modem
or the serial card described in the preceding chapter. PPP (the Point-to-Point Protocol)is used to
establish an IP network connection over a cellular radio modem link.
Depending on local cellular network availability, one of three cellular modem types may be ordered:
• Edge / GPRS
• CDMA / EV-DO
• HSPA
13.1.1.1. PPP Interface
When a PPP connection is established, a network interface is created in the system. The interface
name for both internal and external modem connections is ppp10. Refer to this interface name when
configuring firewall rules.
13.1.1.2. Authentication, IP Addressing and DNS Servers
In contrast to the configuration for land-line modems described in the preceding chapter, username
and password might not be required for some cellular data service providers. If username and
password is not required, you can enter none in the username and password fields of the GUI, or leave
them blank. If authentication is required by the cellular data service provider, again PPP authentication
will automatically use PAP or CHAP. Your service provider will provide you with a username and
password along with an Access Provider Name (APN), which must be entered in the GUI.
The authentication process will provide a local IP address for use on the PPP interface and optionally
the addresses of the DNS servers and a default gateway address to use. You should generally use
these addresses unless you need to provide your own.
The PPP interface's IP address, obtained from the PPP server, can be either a dynamic or a static IP
address. Firewall configuration should be performed as is appropriate.
13.1.1.3. When the Modem Connects
A PPP Client Connection for the cellular modem may be configured to connect at boot time.