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Telos Zephyr Xstream Two-Way Radio User Manual

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USER’S MANUAL

Section 3: GUIDED TOUR of the HARDWARE 47

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IMPORTANT!

Do Not enable PS2 power if you plan to connect the S interface of your Xstream to a Zephyr

Classic or ZephyrExpress.

Doing so could cause damage to one of the units!

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ISDN TIP!

If you are connecting to ISDN using the S (4-wire) Interface you can ignore the status of the

NT1 Sync LED. It will be flickering rapidly if the U (2-wire) interface is not used.

V.35/X.21 Interface Option

Offersinterfacetodigitalsynchronousserialbit‐streams,primarilyfornon‐ISDNapplications.

EitherV.35andX.21equipmentcanbeaccommodatedbytheuseoftheappropriatecable.

MoreinformationcanbefoundinmanualSection9(TheV.35/X.21Interface).

Communications and Control Ports

RS‐232(DCE)

Usingafemale9‐pinD‐subconne

ctor,thisisanRS‐232serial

portusingthestandardmodem‐styleformat.Thedefaultline

protocolis:8bits,1StopBit,NoParity,withnoflowcontrol.

Rateisselectablefrom2400to57,600bpsusingtheRS232

menuselectioninthefirstSYSTEMmenu.Defaultis19,200bps.

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ZEPHYR VS XSTREAM COMPARISON!

NOTE: The RS-232 connectors on the newer Telos gear, such as the Zephyr Xstream, are

wired to look like a modem (i.e. DCE), rather than a computer. Therefore, a standard

“straight through” cable can be used to connect the Xstream to your computer.

You told us that you were much more likely to connect your equipment to a computer than to

a modem, so we responded with this change. We regret any confusion this might cause.

If you need to connect your Xstream to a modem, use a "null modem" adapter such as Radio

Shack #26-1496 (25 pin to 25 pin) or #26-264 (9 pin to 9 pin).

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