User Guide

Data Communication and Host Modes
Rev 3.0B Feb.08 66
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.
SLIP
SLIPmodeisenteredbeusingthe“AT\ASLIP”command.As
inPPPMode,theIPaddressthatthehostassumesisaffected
bythesettingof*HOSTPRIVMODE.SLIPdoesnotnegotiate
theIPaddresswiththeconnecteddeviceorcomputer,so
beforemakingaSLIPconnection,theSLIPdriveron
that
deviceorcomputermustbeconfiguredtousetheIPaddress
specifiedbyqueryi ngS110.
UDP and UDP Pad
WhenthemodemisinUDPPAD(PacketAssemblyandDisas‐
sembly)Mode,allcharactersreceivedontheserialportare
assembledintoUDPpacketsandsenttotheremoteIP
address/portorthePinPointX,andanypacketsreceivedfrom
thesameIP/port‐destinedforthedeviceportofPinPointX(see
*DPORT)‐‐aredisassembledanddumpedontotheserialline.

AUDPsessionisinitiatedbyoneofthe f ollowingevents:
• UsingtheDialUDP(DP)ATcommand(example,
ATDP192.168.3.23/3456).