Telenetics 2185 manual Function Switches, Function Switch One, Enabling/Disabling Subchannels

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Telenetics 2185

FUNCTION SWITCHES

The front-panel-mounted controls consist of three Dual In-line Package (DIP) function switches. Switch banks one and two contain eight indi- vidual switches and switch three contains six individual switches.

The role of function switches one, two and three is summarized in Tables 3-1 through 3-5. The following paragraphs describe these func- tions in more detail.

Function Switch One

Function switch one is an eight-segment DIP switch used to enable or disable each of the five subchannels. It is also used to set the clock data rate.

Switch segments 1-1 through 1-5 Disable/Enable subchannels one through five respectively. Their operation is described as follows:

•Switch 1-n is set to up position to disable Subchannel n

•Switch 1-n is set to the down position to enable Subchannel n, where n = 1 - 5

Subchannels may be disabled to prevent them from contending for the main channel. The main channel broadcasts to all subchannels, whether the subchannels are enabled or disabled. Unused subchannels should be disabled (i. e., appropriate switch set to the up position).

Table 3-1. Enabling/Disabling Subchannels

Switch	Up	Down

1-1	Disable Subchannel 1	Enable Subchannel 1

1-2	Disable Subchannel 2	Enable Subchannel 2

1-3	Disable Subchannel 3	Enable Subchannel 3

1-4	Disable Subchannel 4	Enable Subchannel 4

1-5	Disable Subchannel 5	Enable Subchannel 5

3-3

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Contents Telenetics Proprietary Material Page Page Contents Ordering Information Introduction FeaturesData Interface Main Channel Broadcast Subchannel ContentionSynchronous Data Retiming Buffer 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 ResponsibilitiesPacking Materials UnpackingEquipment Supplied Damage/Material ShortagesEquipment Assembly Installation ProcedureInstallation Tools Required Mechanical InstallationRear Panel Assembly Straight-Through Cable Interface Telenetics Front View Door Closed Operating Controls IndicatorsInside 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 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 Configuration Examples LED IndicatorsFunction Switch Three DTE/DCE OptioningDigital 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 14. Switch Three Settings 2185 a 13. Switch Two Settings 2185 a15. Switch One Settings 2185 B 17. Switch Three Settings 2185 B 16. Switch Two Settings 2185 B18. LED Status Indicator Functions Main Power Connection12 Power Connection Operation POWER-DOWN ProcedurePreventive Maintenance Maintenance PhilosophyCorrective Maintenance Recovery from Anti-Streaming Alarm ConditionReturning Defective Equipment for Repair Installations in the USAGeneral Packing Information 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