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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 162

Z

ZEPHYR CLASSIC VS XSTREAM COMPARISON

Since the Zephyr does not have the L3 Dual/Mono Receive mode, data corruptions on either

data channel will cause dropouts on both audio channels. Therefore, Zephyr users

performing troubleshooting tests would need to switch to mono operation, over a single data

channel, to verify each channel separately.

• Fortwo‐portoperationintheDual/Monomode,audiochannelA

correspondstoPORT1andaudiochannelBcorrespondstoPORT2,when

bothareused.

V.35/X.21

PORTS 1 & 2

(MINI 40 p in)

ZEPHYR™

Xst re a m

DATA PORT

(V.35/X.21)

LIN E

To SW 5 6

CSU/DSU

DATA POR

T

(V.35/X.21)

LINE

To SW 5 6

CSU/DSU

Two port operation supporting 56x2 or 64x2 kbps for mono128 or Stereo operation using both

V.35/X.21 ports. The Interface selection in the TEL menu should be set to" V.35 Split"

Control Leads

Thereareanumberof“controlleads”definedintheV.35andX.21standards.CSU/DSUswill

frequentlyhaveindicatorlightsshowingthestatusofthesesignals,whichmaybeusefulwhen

troubleshootingproblems.

InthedirectionZephyrXstream‐>TA/CSU,theXstreamprovidesDTR(DataTerminalReady)

andRTS(RequesttoSend).Bothofthes

esignalsaremadeactivewhentheV.35interfaceis

selectedandtheZephyrXstreamisreadyforoperation.

h

HOT TIP!

Since the data is generally clocked from the master clock at the Telco anyway, handshaking is

unnecessary. Timing variations between the various handshake signals varies and may cause

equipment incompatibilities. If this occurs, it is entirely ok to disable handshake signals on

the CSU/DSU using the appropriate DIPswitch or command.

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