Multi-Tech Systems MMV1600 owner manual Printer pacing and Flow Control

Page 97

Printer pacing and Flow Control

The example below shows how Pacing and Flow Control work on a printer.

 

(Host)

Channel MUX

Link

 

 

Channel

(Remote)

 

Mini-

MUX

Computer

1

 

 

 

 

 

1

 

Printer

A.

 

Print Data

 

 

 

 

 

Printer Prints

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pace

 

Data

 

B.

 

 

 

 

 

 

Print Buffer

 

 

 

 

 

off

 

 

 

 

Flow Control

 

 

 

Full

 

C.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Flow Control

 

off

 

D.

 

 

 

 

 

 

off

 

 

 

 

 

 

 

 

 

 

Pace

Printer

E.

 

 

 

 

 

 

 

 

on

Ready

 

 

 

 

 

F.

 

 

Flow Control

 

G.

Flow Control

 

on

 

 

 

 

 

 

 

 

 

 

on

 

 

 

 

 

 

 

Print Data

 

Printer Prints

H.

 

 

 

 

 

 

 

 

Data

 

 

 

 

 

 

 

A.Print data volume from the mini is appropriate for the printer to process and print it.

B.The printer cannot handle any more data due to its buffers being full and it issues a Pace OFF signal to the mux.

C.The remote mux sends a Flow Control OFF signal to the other mux and uses its buffer to store any pending print data.

D.The host mux sends a Flow Control OFF signal to the mini and uses its buffer to store any pending print data.

E,F,G. The printer buffer empties and is ready for more print data, so it issues a Pace ON signal which, in turn, causes a Flow Control ON signal through to the mini.

H. Print data from the mini resumes.

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Contents MultiMux Page Record of Revisions RevisionDescription MultiMux #MMV1600C #MMV3200CTable of Contents Operating Procedures CommandsTroubleshooting Service, Warranty and Tech SupportTables AboutThisManual Service, Warranty and Tech Support Description of Statistical Multiplexing Background1.1 Statistical Multiplexing Product Description CommunicationsMultiMux MMV1600/3200 Series Block Diagram Page Networking System Features Voice/FaxDual Composite Links Dynamic Load BalanceCommand Modem Channel SwitchingDiagnostics Parameter MemoryResponse Time Control Dynamic BufferingSynchronous Data Channel DOC Terminal Equipment FCC Regulations for Telephone Line InterconnectionAU7USA-18883-DE-N DSU AU7USA-20328-MD-ESystem Control Specifications Async Data ChannelsComposite Link Internal DSUElectrical/Physical Voice ChannelsCompatibility DtmfModel Description Configuration DescriptionConfiguration Configuration 1 Remote Site Channel Parameters Configuration 1 Local Site Channel ParametersConfiguration 1 Composite Link Configuration Configuration 2 Composite Link Configuration Remote Site Configuration 3 Remote Site 1 Channel Parameters Configuration 3 Local Site Channel ParametersConfiguration 3 Remote Site 2 Channel Parameters Configuration 4 Local Site Voice/Fax Channel Parameters Configuration 4 FXO to FXSConfiguration 4 Remote Site Voice/Fax Channel Parameters Configuration 5 E&M Configuration 5 Remote Site Voice/Fax Channel Parameters Configuration 5 Local site Voice/Fax Channel ParametersConfiguration 6 FXS to FXS Configuration 6 Remote Site Voice/Fax Channel Parameters Configuration 6 Local Site Voice/Fax Channel ParametersRemote Site Configuration 7 Remote Site Voice/Fax Channel Parameters Configuration 7 Local Site Voice/Fax Channel ParametersConfiguration 8 LAN to LAN Page Cabling Procedure InstallationProcedureStepProcedure External Modem/DSU with RS232C InterfaceV.35 Interface Step ProcedureSync Data Channel Port B only Async ChannelComposite Link Cabling Supervisory Console Configuration ProcedureCommand Modem Step Procedure Voice/Fax Channels Step Procedure Async ChannelsPage Type Command Description Command SummaryATC1B4800P1F1E0 $DSUACL SNGA..H$DSUBCL $DSUASPGeneral Commands CommandDescription#MA Store New H command menu is as follows General HelpParameters HelpH5 menu is as follows H4 menu is as followsH6 menu is as follows H7 menu is as followsChannel Parameter Commands DTR ENQ/ACKMLA/B/D SB2 SB1$DSUCL Composite Link Speed and Clocking Commands$DSUSP $ Muxacli$MUXB Additional Composite Link CommandsList Composite Retransmit TimerReport #RBxxxxxVoice/Fax Channel Commands Command Level Silence Suppression WireLocal Interface ATV1/2LIFXOATV1/2LIFXSL Test CommandsATV1/2RIFXO ATV1/2RIFXSGT11 Command Modem CommandsT12 MultiMux Operating Procedures MultiMuxOperatingProceduresConfiguration of Port a Composite Link Configuration of Port B Composite LinkConfiguration of Port B Sync Data Voice/Fax Operating Procedures Voice/Fax Operating ProceduresCommand Modem Operating Procedures Command Modem Operating ProceduresCommand Modem Access on Command modem operation and put Introduction ImportanceofCompositeStatisticsData Troubleshooting Guide TroubleshootingGuideTestCables RD LED on RD OFF Voice/fax channel Voice/Fax Troubleshooting GuideCannot communicate Channel Device Testing Procedure ChannelDeviceTestingLocal Loop Test #4 DSU and Communications Line Testing Procedure DSUandCommunicationsLineTestingRemote Digital Loop Test #5 MultiMux Functional Testing Procedures MultiMuxFunctionalTestingProceduresWatch DOG Test Passed Voice/Fax Channel Testing Procedure Voice/FaxChannelTestingVOICE/FAX Loopback Test #12 Sync Data Channel Testing Procedure SyncDataChannelTestingService, Warranty and Tech Support Repair Procedures for International Distributors AppendixA Ascii Character Code/Hex/Decimal Conversion ChartAppendix B Signal Information Negative PositiveAppendix C Cabling DiagramsDCE to DTE cabling Command Port CablesComposite Link Cabling RJ48 Cabling for Internal DSU Voice/Fax Channel Connectors RJ45 Spade Lug Wire Color FunctionDescription FXO Description FXS Description I-V Voice/Fax Channel CableAnswer a Command Name DefaultRepeat LastATH0 ATH1ATO ATQ1Register ATD5551212RRead or WriteView Active Configuration displaysUser Profiles Store ActiveATX1 ATX0ATX2 Mode While Command ExecutionReturning to After DialIndicator Description Table E-1. LED IndicatorsAppendix E Back Panel LED Indicators DescriptionFCR Power Connector ON/OFF SwitchBPS Modem DIAL-UP Line Connector Command Port TERMINAL/PC ConnectorVOICE/FAX Channel 2 FXO Connector VOICE/FAX Channel 2 FXS ConnectorVOICE/FAX Channel 1 E&M Connector VOICE/FAX Channel 1 FXS ConnectorRS232C/V.35 Shunt Channel Board Number of Channels SwitchChannel # Flow Control Background Appendix FOff Printer pacing and Flow Control Glossary of Terms Page Format Page Parameter Page Page Symbols DSU DOCFXO FXS External Composite LinkLads Load DSU Factory Defaults Command List Channel Parameters CommandMultiMux Functional Testing Procedure Link ProtocolPstn PDNREN RJ48STransmit XMT Indicator Stop Bit Command SB1-SB2Stdm Voice/Fax Input Level Gain Command Voice/Fax Channel Testing ProcedureWord Length Select Command WL5-8 Voice/Fax Channels
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