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Data Communication and Host Modes
Rev 3.0B Feb.08 47
Data Communication
Note: The Raven forwards
messages to and from the
cellular network for only ONE
device per port. The Raven is a
one-to-one gateway and does
not have advanced routing
features required to do one-to-
many routing.
TheprimarypurposeoftheRavenistoforwarddatafroma
singledeviceconnectedtooneoftheportstothecellular
networkand,ultimately,undermostcircumstances,tothe
Internetinaone‐to‐onegatewayconfiguration.
WhentheRavenobtainsitsIPaddressfromyourcellular
provider,italsoobtainsthenetworkroutinginformation
necessarytoforwardmessagestotheirrouterswhichcanthen
forwardonfromthere.TheRaventhenactsasarouterforthe
deviceconnectedtoit,forwardingtoorfromthecellular
network.
Public and Private Mode
InPublicMode,theRavenwillpasstheIPaddressassignedby
thecellularnetworktothedeviceconnectedtoitsport.Public
ModeisthedefaultmodefortheRaven.
Ifyouneedmorecontroloverwhichgatewayaddress,device
address,andnetmaskthatisgivenoutbytheinternalDHCP
server,youcanusetheprivatehostmode,*HOSTPRIVMODE,
andsettheinternalnetworkIPaddresses.TheRavenwilluse
NATtoforwardpacketstotheenddevice.
Tip: When using Public mode, Sierra Wireless recommends
connecting the modem directly to the computer or other end device.
Using a hub or switch may prevent the Raven from updating the IP
address of the end device when an IP address is received from the
cellular network.
InAceManager,thePrivatemodesettingsarepartofthePPP/
Ethernetgroup.