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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Appendix 7 – Ordering ISDN for Countries Using ETS300 (EURO ISDN) 327

Appendix 7: Ordering ISDN for ETS 300 (Euro ISDN)

ThissectionappliestousersinEuropeandothercountrieswheretheEuro‐ISDNETS300

standardissupported(Europe,muchofSouthAmerica,Australia,SouthAfrica,Mexico,etc).

SincetherearevirtuallynooptionswhenorderingEuroISDN,thissectionisprobablynot

needed,howeverwethoughtwecouldhelpbysummarizingwha

tyouwillrequire.

IfyouliveinacountryoutsideofNorthAmericathatdoesnotsupportEuro‐ISDN,yourlocal

TelosSystemsrepresentativeshouldbeabletoprovideyouwithinformationaboutordering

(andusing)ISDNinyourarea.WeassumeyouhavereadthedescriptionofIS

DNinSection7

(ISDNBasics)andarefamiliarwithISDN’sbasicconcepts.Ifyouhavenotreadthatsection,

doingsonowwillhelpyoutobetterunderstandtheinformationthatfollows.

OnoneISDNBRIcircuit,therearethreesimultaneousbi‐directionalchannels:two64kbps

“bearer”or“B”channelsforthetransmissionofuserinformationan

done16kbps“data”or“D”

channelforcallset‐upandstatuscommunication.Thatiswhythisissometimescalled2B+D

service.YoucanusetheBchannels,butonlythephonecompaniesandequipment

manufacturerscanusuallyusetheDchannel.

Fromth

eperspectiveoftelephonenetworkrouting,eachchannelappearstobeaseparateline

withitsownnumberandindependentdial‐outcapabilities.Sinceeachhastobedialedor

answeredseparately,theyappeartobe“lines”tousersalso.WerefertoaBchannelasa“line”

ontheZephyrXstream’smenu

.

ISDNcomesintoyourfacilityontwowires,justlikeplainoldtelephoneservice(POTS).There

theTelecomwillinstallaNT1(NetworkTermination)toprovideyouaccesstotheS(4‐wire)

interfaceusuallyprovided.YouwillbeconnectingthistotheZephyrXstream’stop(8‐pin

)jack.

Details, Details

Inordertocommunicateaccuratelywhatitisyouneed,wethinkyoushouldbefamiliarwith

thevocabularyusedtodescribeISDN.Aswithanything,forbestresults,ithelpstoknowwhat

youaretalkingabout.Foranin‐depthglossaryofterminologypleasecheckAp

pendix9orthe

Teloswebsiteathttp://www.telos‐systems.com

.

Names

We’veseenBasicRateInterfaceISDNcalledbyanumberofnames.Theterm“S∅”is

sometimesusedasatechnicaltermforISDNBRI.Ofcourse,theterm“BRI”isalsoused,mostly

byTelecomtechnicians.Themostcommontermwe’veseeninEuropeis“ISDN‐2”.

Mult

iple Subscriber Numbers (MSN)

Thesearesimplyyourphonenumbers.Thenumberofdigitswillvarydependingonyourarea.

NormallyeachISDNBRIcircuitwillhavethreeMSNs.MSNsareoptional,anddonotneedtobe

enteredintheTelosEquipment.

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