"ddFmF
QQQ_¢_Q¬
1-106 ¤Fs¤mFsnnn
Considerations
^"*FFmFF=§a^F¦F"dh"bp4"aFpOam=p¤aO^FF
4"z"*adaaF§pc§a^©p¤4"aF:4^F4c§a^©p¤"44p¤mF"hOp^F
hp4¤FmamOph"apmOFamV^"mp*FFm=pmFp¦FaO©pzF"apm
p¦F^Fz¤*da4mF§pcam¦pd¦F=§a^^FzFOFF=zF4aOa44pmOaV¤"apm:
¤FpOza¦"F¤mcamV*F§FFm^Fmp=F^p¤d=*F"¤hF=¤mad
¤44FO¤dFamV^"*FFm4phzdFF=
dd4"ddp¤F=p¦FO"4adaaF*©"route-to number with cov np
route-to digits with cov n¦F4p4phh"m=pm"§a4^§^FF
ppc_^F"=mFOdp§aFm"*dF="FF"F="ppc_^F"=mFOdp§4"dd
"Fhz
¦F4ph"©p¤F"4"ddp¦F"mO"4ada©p"=Fam"apm^"amp"
^FFm=amV§a4^zp4FF^a4"dd""ppc_^F"=mFOdp§
4"ddF¦Fm^p¤V^aampzp4FamV"^FF4Fa¦amV§a4^4"¤F
^F4"ddp"d§"©*F"44FzF=p§F¦F:^F"m="m©p^F
amOph"apmam^Fppc_^F"=mFOdp§amOph"apmOp§"=F=§a^^F4"dd
"FaVmpF=
mad^Fdppc"^F"="Fhza"44FzF=*©^FF4Fa¦amV§a4^:^F4"ddF
4pmam¤Fp^F""m©OFF=*"4c"zzdaF=*©^FFm=amV§a4^¦F4p"m=
§addFh"amam"m©zdacadd¤F¤F
Route-to number with coverage yp route-to digits with coverage y
4phh"m=mF¦FF¤dam"ppc_^F"=mFOdp§4"dd"Fhz^F
Fm=amVFm="¤hF^F4"dda"d§"©VpamVp*F"44FzF=^a
4phh"m="d§"©4phzdFF^F4"ddpFp¦F:^F4phh"m=^p¤d=mp
*F¤F=aO^F¦F4p"^FF4Fa¦amV§a4^haV^=Fm©^F4"dd:am4F^F
4"ddFam^a4"F§p¤d=*FVa¦Fm"*¤©aVm"dp§p¤d=*F=a4pmmF4F=
F^a4phh"m=§a^4p¦F"VF©pmd©§^Fm©p¤§"m¤m4pm=aapm"d
amFOdp§|§a^ppc_^F"=mFOdp§"4a¦F}"m=^FFham"amV§a4^a
F¤z"44p=amVd©
¤=a*dFOFF=*"4ch"©*Fzp¦a=F=p^F4"ddF*FOpFamFOdp§a
"FhzF=^FFOpF:"mp^F"¤=a*dFOFF=*"4cOph^FF4Fa¦amV§a4^
h"©4pmO¤F^F4"ddFpF¨"hzdF:"4"ddF^F"amVamV*"4cpm^F
Fm=amV§a4^h"©*F4pmO¤F=aOh¤a4a"zzdaF=¤==Fmd©§^Fm^F
4"ddamFOdp§p^FF4Fa¦amV§a4^
p*"4c§"=4phz"a*ada©pO"zzda4"apm*F§FFm 
§a4^F"m=pd=F§a4^F:dF"¦F^FFm=p=FF
pzapmpm^F¤mcp¤zOphFpa=FO"¤d©¨aamV
"zzda4"apm§add4pmam¤FppzF"F"*FOpF:F¦Fm"OF©p¤¤zV"=F
p¤4"m¤FFm^"m4F="¦"ad"*dFam:§a^p¤"m©mF§pcp¤mc
"=hama"apm4^"mVF:*©"==amV^FamFOdp§_zp4pm=aapm"dp
paVam"d¦F4p|^F4pm=aapm"d"zzdaFpmd©p4"ddam¤F¤F}
 =pmp^"¦Fp^"¦F|pd"F}pO§"FpF4Fa¦F
4"ddOphp^F §a^pO§"Fp§F¦F:aO*p^^F
dp4"d"m=FhpF§a4^Fam"zzda4"apm"F¤zV"=F=p|p
d"F}:m^"m4F=mOph"apmp§"=amV"m=FF¦a4Fp¤amV
4"z"*adaaF4"m"dp*F¤ada«F=p§F¦F:^FamFOdp§_zp4pm=aapm"d
ampmF4F"©OpFm^"m4F=amOph"apmOp§"=amV