User guide

Data Communication and Host Modes
Rev 3.0D Jul.09 59
• AT\APPP
• ATDT10.0.0.1
• ATDT10001
• ATD#19788or#777*99***1#
• CLIENT
Inresponsetoanyoftheprecedingcommands,theRavenXT
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 8-5: 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.