User's Manual

1/28/2015 LMU42x0Hardware&InstallationGuidePULSWiki
https://puls.calamp.com/wiki/LMU42x0_Hardware_%26_Installation_Guide 40/47
o<RSSI>:
Thisisthesignalstrengththewirelessmodemseesfromthenetwork.IngeneraltheLMUis
atleastscanningforthenetworkiftheRSSIisnot113.
o[./d/D]:
Ifthecharacter‘D’ispresent,itindicatestheLMUhadadatasessionestablishedwhenit
respondedtothestatusrequest.Forthe8Bitproductlineanuppercase‘D’indicatesboth
theInboundandMaintenancesocketsareready.Thelowercase‘d’indicatesthatonlythe
Maintenancesocketisready.A‘.’indicatesnosocketsareready.
o[./a/A]:
ThisfieldindicatesiftheLMUhasreceivedanAcknowledgementfromtheInboundserver.
ThisfieldwillbeemptyiftheLMUhasneverreceivedanACK.Thelowercase‘a’willbe
presentifithasreceivedanACKsincethelastcoldboot(i.e.powercycle)butnotthelast
warmboot(AppRestartorSleep).Theuppercase‘A’willbepresentiftheLMUhas
receivedanACKsincethelastwarmboot.A‘.’Indicatesnoacknowledgementhasbeen
received.
o[./L]:
ThisfieldindicatesiftheLMU’slogiscurrentlyactive.An‘L’indicatesthatthelogis
currentlyinuse(i.e.oneormorerecordshavebeenstored)wherea‘.’indicatesthelogis
inactive.
o[IPAddress]:
ThisisanoptionalfieldifandisonlypresentiftheLMUhasestablishedavaliddata
session.ThisfieldwillcontainthecurrentIPaddressoftheLMUasassignedbythe
wirelessnetwork.Notethatifyouseeavalueof192.168.0.0,thisisanindicationthatthe
LMUhasnotbeenabletoestablishadatasession.
o[<APN>]
ThecurrentAccessPointNameinusebyaGSMLMU.
GPS:
o[Antenna<Short/Open/Off>]:
Thisfield,ifpresent,indicatesaproblemwiththeLMU’sGPSantenna.AvalueofShort
indicatesthattheantennacablehaslikelybeencrushed.AvalueofOpenindicatesthatthe
antennacableiseithercutordisconnected.AvalueofOffindicatesthattheLMU’GPS
receiverisoff.
o[NoTimeSync]:
Ifthisfieldispresent,itindicatesthattheLMU’sGPSreceiverhasnotbeenabletofind
evenasingleGPSsatellite.Thiswouldlikelybeenseeninconjunctionwiththeabove
antennaerror,oriftheLMUGPSantennaisotherwiseblocked.
o[<FixStatus><SatCount>]:
IfthesefieldsarepresentitindicatesthattheLMUhas,orhadavalidGPSsolution.The
<SatCount>fieldindicateshowmanyGPSsatellitesarecurrentlyinusebytheLMU.The