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Chapter5–ConfiguringthePhoneBook
MultiVOIP®Voice/FaxoverIPGateways 99
Europe
ThemostdirectuseoftheVOIPsystemismakingcallsbetweentheofficeswheretheVOIPsarelocated.
Consider,forexample,theWrenClothingCompany.ThiscompanyhasVOIP‐equippedofficesinLondon,Paris,
andAmsterdam,eachservedbyitsownPBX.VOIPcallsbetweenthethreeofficescompletelyavoid
internationallong‐distancecharges.Thesecallsarefree.ThephonebookscanbesetuptoallowallWren
Clothingemployeestocontacteachotherusing3‐,4‐,or5‐digitnumbers,asthoughtheywereallinthesame
building.
InanotheruseoftheVOIPsystem,the
localcallingareaofeachVOIPlocationbecomesaccessibletoall ofthe
VOIPsystem’susers.Asaresult,internationalcallscanbemadeatlocalcallingrates.
Forexample,supposethatWrenClothingbuysitszippersfromTheBluebirdZipperCompanyinthewesternpart
ofmetropolitanLondon.In
thatcase,WrenClothingpersonnelinbothParisandAmsterdamcouldcallthe
BluebirdZipperCompanywithoutpayinginternationallong‐distancerates.OnlyLondonlocalphonerateswould
becharged.ThisappliestocallscompletedanywhereinLondon’slocalcallingarea.
Generally,localcallingratesapplyonlywithinasingl earea
code,and,forallcallsoutsidethatareacode,
nationalratesapply.Thereare,however,someEuropeancaseswherelocalcallingratesextendbeyondasingle
areacode.LocalratesbetweenInnerandOuterLondonareoneexampleofthis.Itisalsopossible,insome
locations,thatcallswithin
anareacodemaybenationalcalls‐butthisisrare.
France
The
Netherlands
5
5
Wren Clothing Co.
VOIP/PBX Site
London
5
Wren Clothing Co.
VOIP/PBX Site
Amsterdam
Wren Clothing Co.
VOIP/PBX Site
Paris
United Kingdom
Free VOIP Calls
France
The
Netherlands
5
5
Wren Clothing Co.
VOIP/PBX Site
London
5
Wren Clothing Co.
VOIP/PBX Site
Amsterdam
Wren Clothing Co.
VOIP/PBX Site
Paris
United Kingdom
Calls at London local rates
Local Calling Area
Bluebird Zipper Co.
London