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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Section 11: THE WORKS – Detailed Menu Reference 223

Allcalls,regardlessofcalltypes,willbeansweredautomatically.

ISDN

CircuitSwitchDatacalls(i.e.callersfromaZephyrXstreamwhentheCallTypeis

setto“Zephyr”)willbeansweredautomatically.CircuitSwitchedVoice(i.e.

POTS/G.711)callsaretreatedasif“none”wasselected.

Phone

CircuitSwitchVoicecalls(i.

e.callersfromanXportonaPOTSline,aregular

telephone,oraZephyrXstreamwhentheCallTypeissetto“Phone”)willbe

answeredautomatically.CircuitSwitchedDatacallsaretreatedasif“none”was

selected.

Interface

TheInterfaceselectionwillactivateoneofthefollowingportsofth

eZephyr

Xstream

ISDN/ISDNModem

EitheroftheseselectionswillenabletheZephyrXstream'sbuilt‐inISDN

interface,ifpresent.TheISDNModemselectionloadsthecoderequiredtotalk

totheZephyrXportconnectedtoaPOTS(analog)line.Whencallisplacedin

PhoneMode(intheDIALmenu),theIn

terfacesettingwillchangebetweenISDN

toISDNModemautomatically.Thiswillalsooccurwhenanincoming"voice"

callisanswered,andcanbeignoredbytheuser;ifanISDNmodecallis

subsequentlymade,orreceived,theunitwillswitchbacktoISDNinterface

automatically.

Anoteregar

dingModedetectionandInterfaceswitchingofincomingcalls:

TheISDNnetworkwillsignalifacallis"voice"or"data"call.Sincemodemsuse

POTStechnology,callsfromXportareconsidered"voice"calls.Inthecaseofa

"data"call,nootherinformationisneeded;theXstreamwillswitchfromth

e

ISDNModemInterfacetoISDN,ifnecessary,andanswerthecall.

Ifthenetworkindicatesanincomingcallisa"voice"call,theXstreammust

determineifthisisacallfromatelephone,orfromthemodemofanXport.

Therefore,theXstreamswitchestheInterfaceselectionfromtheISDNtoISDN

Mod

em,ifnecessary,answersthecall,andthenlistensforamodemcarrier

tone.Ifnomodemtoneisdetected,theunitun‐mutestheaudioandthecallis

considereda"Phone"Modecall.Ifamodemtoneisdetected,theXstream's

modemwillbeg

innegotiatingwiththeXport.

Therefore,allincoming"voice"callshaveashortdelaybeforeaudioisheard.

V.35Split

ThisselectionwillenabletheXstream'sbuilt‐inV.35/X.21interface,ifpresent.

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