Telenetics 2185 manual Port-Sharing Mode, Port-Sharing Application

Page 10

Telenetics 2185

When operating with control signal contention, the 2185 is trans- parent to the data stream.

When operating with data contention, subchannel data must be mark idle and 16 consecutive marks cannot appear in mid-mes- sage. The minimum data rate for an external clock is 50 bps.

Port-Sharing Mode

In the port-sharing mode, the 2185's main channel is connected directly to a CPU or controller port (DTE). Subchannel devices communicate with the 2185 via modem links. Figure 1-1 shows a typical port-sharing application.

Figure 1-1. Port-Sharing Application

1-4

Image 10
Contents Telenetics Proprietary Material Page Page Contents Ordering Information Introduction FeaturesData Interface Main Channel Broadcast Subchannel ContentionSynchronous Data Retiming Buffer Applications Anti-StreamingPort-Sharing Mode Port-Sharing ApplicationModem-Sharing Mode Modem-Sharing ApplicationCo-Located Terminals CascadingLocal Cascading Application Remote Cascading Application Specifications SpecificationsTelenetics Customer Responsibilities Site Selection and PreparationEquipment Supplied UnpackingPacking Materials Damage/Material ShortagesInstallation Tools Required Installation ProcedureEquipment Assembly Mechanical InstallationRear Panel Assembly Straight-Through Cable Interface Telenetics Operating Controls Indicators Front View Door ClosedInside Front Panel Function Switch One Function SwitchesEnabling/Disabling Subchannels Data Rate Selection Using Switch Segments 1-6 to Function Switch TwoFunction Switch Two Summary Switch Segment 2-1 Contention Mode Switch Segment 2-4 Anti-Streaming Enable/Disable Clock Routing ConfigurationsSwitch 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 Function Switch Three LED IndicatorsConfiguration Examples DTE/DCE OptioningDigital Bridging Application Example Digital Bridging Application Switch One Switch TwoLeased-Line Backup Application Example Switch Three10 Leased-Line Backup Application Switch One 10. Switch Two 11. Switch ThreeMultimaster Multidrop Application Example 11. Multimaster Multidrop Application12. Switch One Settings 2185 a 14. Switch Three Settings 2185 a 13. Switch Two Settings 2185 a15. Switch One Settings 2185 B 16. Switch Two Settings 2185 B 17. Switch Three Settings 2185 BMain Power Connection 18. LED Status Indicator Functions12 Power Connection POWER-DOWN Procedure OperationCorrective Maintenance Maintenance PhilosophyPreventive Maintenance Recovery from Anti-Streaming Alarm ConditionReturning Defective Equipment for Repair Installations in the USAGeneral Packing Information Installations Outside the USA or Canada Telenetics Ordering Information Telenetics Ordering InformationTelenetics Glossary Glossary-2 Glossary-3 Glossary-4 Index INDEX-2 INDEX-3 INDEX-4