Telenetics 2185 manual Glossary-3

Page 59

Telenetics 2185

RDY

Ready. LED indicator lamp that illuminates when

 

the main channel inbound DSR or DTR is ON.

Straight-Through

Cable terminated with 25-pin EIA connector at each

Cable

end. Connections are made on a pin-to-pin basis.

 

See Figure 2-2.

Subchannel

Subchannels contend for use of the main channel to

Contention

send data to the CPU or controller. If more than one

 

subchannel tries to access the main channel at one

 

time, the 2185 selects one subchannel and blocks

 

data from all the others. You may select either of

 

two contention modes — either data contention or

 

control signal contention.

Synchronous

When operating in a synchronous data environment,

Retiming Buffer

the 2185 uses an internal ±4-bit buffer to retime

 

inbound subchannel data to the main channel clock.

 

The buffer compensates for phase differences

 

between the subchannel and main channel clocks

 

and can absorb clock jitter and minor differences in

 

frequency.When the 2185 is configured for

 

asynchronous operation, the retiming buffer is

 

bypassed.

Glossary-3

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Contents Telenetics Proprietary Material Page Page Contents Ordering Information Data Interface FeaturesIntroduction Synchronous Data Retiming Buffer Subchannel ContentionMain Channel Broadcast Anti-Streaming ApplicationsPort-Sharing Application Port-Sharing ModeModem-Sharing Application Modem-Sharing ModeCascading Co-Located TerminalsLocal Cascading Application Remote Cascading Application Specifications SpecificationsTelenetics Site Selection and Preparation Customer ResponsibilitiesDamage/Material Shortages UnpackingPacking Materials Equipment SuppliedMechanical Installation Installation ProcedureEquipment Assembly Installation Tools RequiredRear Panel Assembly Straight-Through Cable Interface Telenetics Front View Door Closed Operating Controls IndicatorsInside Front Panel Enabling/Disabling Subchannels Function SwitchesFunction Switch One Function Switch Two Summary Function Switch TwoData Rate Selection Using Switch Segments 1-6 to Switch Segment 2-1 Contention Mode Clock Routing Configurations Switch Segment 2-4 Anti-Streaming Enable/DisableSwitch Segment 2-7 Main Channel RTS/DCD Strapping External Clock Reference with Main Channel DTE External Clock Reference with Main Channel DCE Internal Clock Reference with Main Channel DTE Internal Clock Reference with Main Channel DCE Subchannel 1 DCE Clock Reference with Main Channel DTE Subchannel 1 DCE Clock Reference with Main Channel DCE DTE/DCE Optioning LED IndicatorsConfiguration Examples Function Switch ThreeDigital Bridging Application Example Digital Bridging Application Switch Two Switch OneSwitch Three Leased-Line Backup Application Example10 Leased-Line Backup Application Switch One 11. Switch Three 10. Switch Two11. Multimaster Multidrop Application Multimaster Multidrop Application Example12. Switch One Settings 2185 a 15. Switch One Settings 2185 B 13. Switch Two Settings 2185 a14. Switch Three Settings 2185 a 17. Switch Three Settings 2185 B 16. Switch Two Settings 2185 B18. LED Status Indicator Functions Main Power Connection12 Power Connection Operation POWER-DOWN ProcedureRecovery from Anti-Streaming Alarm Condition Maintenance PhilosophyPreventive Maintenance Corrective MaintenanceGeneral Packing Information Installations in the USAReturning Defective Equipment for Repair Installations Outside the USA or Canada Telenetics Telenetics Ordering Information Ordering InformationTelenetics Glossary Glossary-2 Glossary-3 Glossary-4 Index INDEX-2 INDEX-3 INDEX-4