User's Manual

1/28/2015 LMU42x0Hardware&InstallationGuidePULSWiki
https://puls.calamp.com/wiki/LMU42x0_Hardware_%26_Installation_Guide 38/47
Pleasenotethatitmaytakeseveralseconds(orlonger)fortheLMU42x0™tocommunicatewiththemodem
andacquirethewirelessnetwork.
5.4.2GPSVerification
ThenextstepistoverifythattheGPSreceiverisseeingenoughsatellitestoobtainavalidGPSposition.
Again,installershavetwochoicesonhowtoperformthisverification.First,liketheCommVerification,there
isaGPSstatusLED(i.e.,theoneclosesttotheSMAconnector).IfthisLEDissolid,thentheLMUhasfound
GPSservice.
IftheLEDisnotvisiblethenGPSservicemaybeverifiedusinganATCommand:
AT$APPGPS?
Theresponseshouldbesimilarto:
Lat=3304713,Lon=‐11727730,Alt=0
Hdg=113Spd=03D‐RTIMEHDOP=130nSats=7
Installersarelookingforthe3DRTIMEsettingalongwithavalidLat,Longpair(i.e.somethingotherthan0).
IftheGPSreceiverdoesnothaveavalidlockwithin23minutes,installersshouldcheckantennaplacement
(seetheInstallationNotessectionforplacementsuggestions),theantennaconnectorandthattheantennahasa
clearviewofthesky.Forfurthertroubleshooting,installersshouldcontactCalAmpSupport
([e-mail])
5.4.3InboundVerification
ThelastitemtoverifyisthattheLMU42x0™issendingdatatothecorrectserver.Ingeneral,thisisatwo
stepprocessthatwillneedtheaidofanobserveronthebackend.Thatis,atechnicianwillhavetobelogged
insotheycanmonitordatacomingintothebackendmapping/vehiclemanagementapplication.
First,verifythattheLMU42x0™isusingthecorrectInboundIPaddressbyusing:
AT$APPINBOUND?
Theresponseshouldbesimilarto:
INBOUNDLMD
INBOUND0ADDRddd.ddd.ddd.ddd:ppppp*
INBOUND0URLmyURL.myCompany.com
INBOUND1ADDR0.0.0.0:20500
INBOUND1URL
INBOUND2ADDR0.0.0.0:20500
INBOUND3ADDR0.0.0.0:20500