"dd˜Fm›F•
Considerations
Observability
d›^p¤V^˜"m˜"VFm›˜4"m˜*F˜"˜hFh*F•˜pO˜h¤d›azdF˜’zda›’˜p•˜’cadd’:˜"m˜"VFm›˜4"m˜*F˜ p*’F•¦F=˜*©˜pmd©˜pmF˜p*’F•¦F•˜"›˜"˜›ahF•˜O˜›§p˜"VFm›’˜§a›^˜=aOOF•Fm›˜’¤zF•¦a’p•’˜ "•F˜p*’F•¦F=˜"m=˜pmF˜"VFm›˜4"dd’˜›^F˜p›^F•:˜›^F˜p•aVam"›p•Œ’˜’¤zF•¦a’p•˜p*’F•¦F’˜ ›^F˜4"dd:˜"m=˜›^F˜p›^F•˜’¤zF•¦a’p•˜a’˜zd"4F=˜am˜›^F˜§"a›˜’›"›F•˜
m˜"››Fm="m›˜4"m˜*F˜p*’F•¦F=˜*¤›˜4"mmp›˜*F˜"m˜p*’F•¦F••
Ineligibility
˜4"dd˜›p˜"m˜"VFm›˜F¨›Fm’apm˜p•˜˜a’˜amFdaVa*dF˜Op•˜p*’F•¦amV˜§^Fm˜›^F˜4"dd9
■’˜"d•F"=©˜*FamV˜p*’F•¦F=
■’˜*FamV˜*¤’©_¦F•aOaF=
■"’˜"›"˜•a¦"4©˜"4›a¦F
■"’˜"›"˜F’›•a4›apm˜"4›a¦F:˜a’˜4pmOF•Fm4F=˜§a›^˜"m˜F¨›Fm’apm˜›^"›˜^"’˜
"›"˜F’›•a4›apm˜"4›a¦F:˜p•˜a’˜"˜˜4"dd˜›^"›˜•F"4^F=˜"m˜F¨›Fm’apm˜›^"›˜^"’˜ "›"˜F’›•a4›apm˜"4›a¦F
■"’˜•a¦"4©˜I˜"m¤"d˜¨4d¤’apm˜"4›a¦F:˜a’˜4pmOF•Fm4F=˜§a›^˜"m˜F¨›Fm’apm˜ ›^"›˜^"’˜•a¦"4©˜I˜"m¤"d˜¨4d¤’apm˜"4›a¦F:˜p•˜a’˜"˜˜4"dd˜›^"›˜•F"4^F=˜ "m˜F¨›Fm’apm˜›^"›˜^"’˜•a¦"4©˜I˜"m¤"d˜¨4d¤’apm˜"4›a¦F
■
■’˜"˜_p*’F•¦F=˜4"dd˜›^"›˜•F"4^F’˜"m˜¤mp*’F•¦"*dF˜F¨›Fm’apm˜p•˜•˜ p›F˜›^"›˜›^F˜˜pO˜›^F˜^¤m›˜V•p¤z:˜’zda›:˜p•˜’cadd˜¤’F=˜›p˜=a’›•a*¤›F˜›^F˜
Trunk calls
O˜"m˜"VFm›˜*FamV˜p*’F•¦F=˜h"cF’˜"m˜›•¤mc_4"dd:˜p*’F•¦"›apm˜’›"•›’˜"O›F•˜›^F˜ "VFm›˜Oama’^F’˜=a"damV•˜p•˜4Fm›•"d˜pOOa4F˜}˜›•¤mc’:˜=a"damV˜a’˜4pm’a=F•F=˜ 4phzdF›F˜§^Fm˜"m’§F•˜’¤zF•¦a’apm˜a’˜•F›¤•mF=˜p•˜§^Fm˜"m’§F•˜’¤zF•¦a’apm˜ ›ahFp¤›˜p44¤•’•
Multiple observers
¤d›azdF˜p*’F•¦F•’˜4"m˜p*’F•¦F˜"˜’amVdF˜˜’ah¤d›"mFp¤’d©:˜*¤›˜pmd©˜pmF˜ p*’F•¦F•˜a’˜p*’F•¦amV˜"˜Va¦Fm˜4"dd˜›p˜›^F˜•˜^F•F˜a’˜mp˜daha›˜›p˜›^F˜m¤h*F•˜pO˜ p*’F•¦F•’˜p*’F•¦amV˜"˜’amVdF˜˜"’˜dpmV˜"’˜›^F˜›p›"d˜m¤h*F•˜pO˜p*’F•¦F•’˜ "4›a¦Fd©˜p*’F•¦amV˜’˜=pF’˜mp›˜F¨4FF=˜Q¬•
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