Sierra Wireless 20070914 Cell Phone User Manual


 
Data Communication and Host Modes
Rev 3.0B Feb.08 55
PPPmodeisenteredfromtheATmodebyusinganyofthe
followingcommands:
AT\APPP
ATDT10.0.0.1
ATDT1000 1
ATD#19788or#777*99***1#
CLIENT
Inresponsetoanyoftheprecedingcommands,theRavenwill
respondwithCONNECTacarriagereturnandnewlineandis
readyforthehosttobeginPPPnegotiations.TheIPreceived
bythehostintheresultingnegotiationwilleitherbeaprivate
(nonroutable)IPaddressora
public(networkroutable)IP
addressprovidedbythenetwork,dependingonthesettingsof
*HOSTPRIVMODE.If*HOSTPRIVMODE=1,thevalueof
theprivateIPaddresscanbedeterminedbeforehandby
queryingS110.TheprivateIPaddresstobeusedcanbe
definedwiththecommandAT*HOSTPRIVIP=192.168.100.33,
substitutingthedesired
IPaddress.
Figure 6-5: AceManager : PPP/Ethernet
UsingaprivateIP insulatesthePPPclientfromchangesinIP
addressesoftheunderlyingnetwork.Thewillperformbasic
NATlikeaddresstranslationonallpackets.
IfapublicIPaddressisbeingused,anychangesintheIP(as
determinedbythewirelessnetwork)willresultinthePPPlink
tothehostbeingdisconnected,requiringthehosttoreinitiate
it.ThepublicIPispassedtothehostinthePPPnegotiations,
sowhenthe
networkforcesachange,themodemhastoforce
thehosttorenegotiatethePPPlinktomakethishappen.