Data Communication and Host Modes
PPPmode is entered from the AT mode by using any of the following commands:
•AT\APPP
•ATDT10.0.0.1
•ATDT10001
•ATD#19788 or #777 *99***1#
•CLIENT
In response to any of the preceding commands, the PinPoint‐E will respond with CONNECT a carriage return and new line and is ready for the host to begin PPP negotiations. The IP received by the host in the resulting negotiation will either be a private (non‐routable) IP address or a public (network‐ routable) IP address provided by the network, depending on the settings of *HOSTPRIVMODE. If *HOSTPRIVMODE=1, the value of the private IP address can be determined beforehand by querying S110. The private IP address to be used can be defined with the command AT*HOSTPRIVIP=192.168.100.33, substituting the desired IP address.
Figure 7-5: AceManager : PPP/Ethernet
Using a private IP insulates the PPP client from changes in IP addresses of the underlying network. The will perform basic NAT‐like address translation on all packets.
If a public IP address is being used, any changes in the IP (as determined by the wireless network) will result in the PPP link to the host being disconnected, requiring the host to reinitiate it. The public IP is passed to the host in the PPP negotiations, so when the network forces a change, the modem has to force the host to renegotiate the PPP link to make this happen.
|
|
|
|
|
|
|
Rev 3.0B Feb.08 |
|
|
|
|
| 61 |
|
|
|
