User Guide

Introduction to the PinPoint X
Rev 3.0B Feb.08 8
Figure 1-8: Connecting to the Internet
ThePinPointXwillperformaone‐to‐oneroutingforall
internettraffictoandfromthecomputerorotherenddevice.
One‐to‐onemeansthatyourPinPoint Xwillprovidea
connectionforonedevicetotheInternetatatime.InPrivate
Mode,thePinPointXwill
provideNAT(NetworkAddress
Translation)forthecomputerorotherenddevice.
Note: The PinPoint X does not provide advanced routing required by
one-to-many (several devices connected to one port). If you need to
have more than one device connected to the Internet through your
PinPoint X, you will need to have a router connected to the modem.
The modem would provide the one-to-one connection to the router
with the router configured to provide a broader NAT service to the
other devices connected to it.
Dynamic vs. Static IP Addresses
Therearetwotypesofaddressesonnetworks:dynamicand
static.
• Dynamicaddressesareassignedona“needtohave”basis.
YourPinPointXmightnotalwaysreceivethesame
addresseachtimeitconnectswithAT&T.
• Staticaddressesarepermanentlyassignedtoaparticular
accountandwillalwaysbeusedwheneveryourPinPoint
XconnectstotheInternet.TheIPaddresswillnotbegiven
toanyoneelse.
MostISPs(cellularincluded)usedynamicIPaddressesrather
thanstaticIPaddressessinceitallowsthemtoreuseasmaller
numberofIPaddressesforalargenumberofcustomers.A
dynamicIPaddressissuitableformanycommonInternet
uses,suchaswebbrowsing,lookingupdataonanother

computersystem,orotherclientfunctions(suchasdataonly
beingsentoutoronlybeingreceivedafteraninitialrequest).
Tip: If your account with AT&T includes a dynamic IP address and
you need a static IP, please consult your AT&T Representative for
more information about changing your account for static IP support.
IfyouneedtocontactyourPinPointX,adeviceconnectedto
thePinPoint X,orahostsystemusingthePinPointXfromthe
Internet,youneedtohaveaknownIP(suchasonewhichis
static)ordomainname(anIPaddresswhichisconvertedbya
DNS
serverintoawordbasedname).IfyouhaveadynamicIP