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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Section 9: The V.35/X.21 Interface Option 154

6. Oncetheconnectorsarealigned,pushtheV.35/X.21optioncardstraight

downintotheconnectoronthemotherboard.Onlymoderatepressure

shouldberequiredtoseatthecard.

7. Fastentheoptioncardtotherearpanelofthechassisusingthetwo4‐40

buttonheadscrewspreviouslyremovedinstep3,abov

e.

8. Replacethelid.IfyouhaveaZephyrXstreamMXP,alignthebluebumpers

withtheircorrespondingholes.

9. Fastenthelidusingthe18(or14)screwsremovedinstep1.

10. TouseyourV.35/X.21interfaceyouwillneedtoconnectanappropriate

cable:

• ForV.35useTelospar

t#2091‐00023(old#9812‐0000)

• ForX.21useTelospart#2091‐00024(old#9822‐0000)

11. ToenabletheX.21Interface,changetheInterfacemenuselectionIntheTEL

menutoV.35SplitorV.35Singleasappropriateforyourapplication.

9.2 Uses for the X.21/V.35 Interface Option

SWITCHED 56

Switched56isatransitiontechnologywhichisbeingofferedprimarilyinthefewareasofthe

USA&CanadawhereISDNisnotavailable.Asthenamesuggests,thisisaservicethatpermitsa

singlebi‐directionaldigitaldatastreamtobesentata56kbpsrate.Aswitched56linere

quires

aChannelServiceUnit/DataServiceUnit(CSU/DSU)tointerfacethedigitallinewiththeZephyr.

V.35/X.21

INTERFACE

(

MINI-40 PIN

)

Ze p h y r™

Xstre a m

Lin e Po rt

Data Port

(V.35/ X.21)

CSU/DSU

To SW 5 6

PO RT1

PO RT2

(not used)

Typical setup for mono configuration. Only one port is used.

Switched56comesintwovarieties:two‐wireandfour‐wire.Theoneyouneeddependsupon

theservicestyleofferedbyyourtelephonecompany.Inmanycases,youcanpurchasethis

equipmentfromyourTelosSystemsdealer.ThemostpopularmanufacturerfortheseSwitched

56CSU/DSUsseemstobe:

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