PPP Configuration

Use these settings to change the receiver PPP (Point-to-Point Protocol) configuration, which is used to make internet connections through a wired serial connection.

Select Network Configuration / PPP.

 

Port – Indicates which port the PPP connection is to be established on.

State – Indicates if a PPP connection is currently connected.

Auto Restart – Select this check box to have the receiver automatically re-establish the PPP connection if it is dropped.

Use as default route – When this check box is selected, the PPP configuration is used by default for internet access. See Routing Table Configuration.

Startup script type – Select a startup script for the receiver. The script is sent to the PPP CHAP (Challenge Handshake Authentication Protocol) program so that user names and passwords can be checked.

  • No Startup Script – Does not run CHAP before PPP is established.

  • Windows script – Serves the Microsoft Windows XP “clientclient” handshaking mechanism.

  • GPRS script – Only available when a GSM/GPRS modem is connected to the receiver and is detected. The initstring and dialstring, user name and password, and possibly CPIN in the advanced settings fields (below) will be used in CHAP.

  • External modem script – Select this option when a circuit-switched or packet-switched modem is connected to the receiver.

When you select the GPRS script option from the Startup script type list, the following additional fields appears:

Use Int/Dial string – When this check box is selected, you can manually enter the modem initialization and the modem dial strings as supplied by the carrier.

  • Modem Init. String – Enter the initialization string required by the modem. This string contains APN information. By default, it is the Windows “clientclient”. However, for the GSM/GPRS Modem port, the Init String is similar to the following example:

    • For T-Mobile: AT+CGDCONT=2,“IP”,“internet2.voicestream.com”

    • For Cingular: AT+CGDCONT=2,“IP”,“WAP.CINGULAR”

  • Modem Dial String – Enter the dial string required by the modem. Normally, you use the default setting “ATD*99***2#” where 2 in this string is matched with the 2 in “Modem Init String”.

Use Trimble APN Database – The receiver firmware contains a database of known carriers with associated modem initialization and modem dial strings, which you can select by country, provider, andservice plan. This database is updated with new carrier information at each firmware release.

APN – The Access Point Name (APN) can be entered manually or generated by using the Trimble APN database.

CID – Caller Identification. Should be in the range (1-2). The default is 2.

When you select the External modem script option from the Startup script type list, the following additional fields appears:

Enable CPIN Check – Checks and verifies that the CPIN defined in the advanced settings (below) is valid for the SIM being used in the external modem.

Use External Modem Default – When this check box is selected, the dial string uses “ATD*99#” and will not use any value set in the Modem Init. String field. The “ATD*99#” dial string forces the PPP to use the external modem’s default settings, which the receiver does not know.

Use Int/Dial string – When this check box is selected, you can manually enter the modem initialization and the modem dial strings as supplied by the carrier.

  • Modem Init. String – Enter the initialization string required by the modem. This string contains APN information. By default, it is the Windows “clientclient”. However, for the GSM/GPRS Modem port, the Init String is similar to the following example:

    • For T-Mobile: AT+CGDCONT=2,“IP”,“internet2.voicestream.com”

    • For Cingular: AT+CGDCONT=2,“IP”,“WAP.CINGULAR”

  • Modem Dial String – Enter the dial string required by the modem. Normally, you use the default setting “ATD*99***2#” where 2 in this string is matched with the 2 in “Modem Init String”.

Use Trimble APN Database – The receiver firmware contains a database of known carriers with associated modem initialization and modem dial strings, which you can select by country, provider, andservice plan. This database is updated with new carrier information at each firmware release.

APN – The Access Point Name (APN) can be entered manually or generated by using the Trimble APN database.

CID – Caller Identification. Should be in the range (1-2). The default is 2.

User Name – Enter the username (if required) to log on to the carrier network that the modem connects to.

Password – Enter the password (if required) to log on to the carrier network that the modem connects to.

Verify Password – Re-enter the password (if required).

Show advanced settings – Select this check box to view and change advanced settings.

Advanced settings

Default Local Address – Enter the IP address that is assigned to the receiver when a PPP connection is established.

Default Remote Address – Enter the IP address that is assigned to the remote device when a PPP connection is established.

DNS IPv4 Address – Enter the default DNS IP version 4 address.

Refuse PAP – By default, this check box is not selected. If it is selected, no PAP (Password Authentication Protocol) is enforced in the system.

Refuse CHAP – By default, this check box is not selected. If it is selected, the system does not use CHAP (Challenge Handshake Authentication Protocol).

Enable ACCM negotiation – ACCM (Asynchronous Control Character Map) is one of the LCP-negotiated options within the CONFREQ frame. ACCM sets the character escape sequences, which tells the port to ignore specified control characters within the data stream. If the router at the other end of the connection does not support ACCM negotiation, the port is forced to use FFFFFFFF. By default, this check box is selected.

Enable ACCM configuration – ACCM Configuration is one of options in PPP LCP layer, and allows LCP Configure-Ack to do ACCM mapping. By default, this check box is not selected.

Max idle time [minutes] – The PPP connection is dropped after this length of idle time.

Max connect time [minutes] – The PPP connection is dropped after this amount of connection time. If it is set to 0, the maximum connection time is not limited. That is, there is an infinite connection time.

CPIN – SIM PIN (Personal Identification Number). The GSM/GPRS Modem has a SIM card. For some European countries, before dialing, a PIN is required for the modem. The CPIN has a value of 4 to 8 digits, if required. If a user tries to make a PPP connection before the SIM PIN code is confirmed, it refuses the “ATD” command with an error. However, after three unsuccessful attempts to enter the PIN, the PUK (Personal Unblocking Key) is required to force the user to enter a new PIN code.

Verify CPIN – Re-enter the SIM PIN code to verify the digits entered in the CPIN field.

Save – Saves the configuration into the receiver's application file (Appfile) without attempting to make a PPP connection.

Connect – Starts the PPP connection based on the above configuration and saves any changes to the receiver's Appfile.

Disconnect – Disconnects any PPP connection.

Go Back To Defaults – Sets the port configuration to its default settings.