Multi-Tech Systems MMV1600 Appendix E, Table E-1. LED Indicators, Indicator Description

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Appendix E

Indicators/Switches and Connectors

Indicators

	Figure E-1. MultiMux Front Panel
	Table E-1. LED Indicators
Indicator	Description
	Channel
XMT/RCV	The Channel Transmit (XMT) and Receive (RCV) indicators show the activity level on each channel.
	MultiMux MMV1608 uses Channel One through Channel Eight indicators, MMV1616 uses
	Channel One through 16, MMV3224 uses Channel One through Channel 24, and finally
	MMV3232 uses Channel One through 32.
FC	The Flow Control (FC) indicator is On when the MultiMux has stopped the channel data, because the
	channel cannot accept any more data. If the channel data is being stopped by a remote
	device, the FC indicator on the host MultiMux lights. The Flow Control Received (FCR)
	indicator on the affected composite link also lights. If the channel data is being stopped by one
	of the composite links, only the FC indicator for the affected channel lights.

	Table E-1. LED Indicators (Continued)
Indicator	Description
	Composite Link A/B
CD	The Carrier Detect (CD) indicator lights when the composite link detects a carrier signal from the
	remote MultiMux. The CD indicator lights when a carrier signal is detected for an internal DSU
	and when an external device (DSU or composite link modem) is connected to the composite
	link, and is detecting a valid carrier.
RCV	The Receive (RCV) indicator flashes as data is being received from the remote multiplexer.
	The RCV indidator flashes for both internal DSU and an external link device.
XMT	The Transmit (XMT) indicator flashes as data is being transmitted to the remote multiplexer.
	The XMT indicator flashes for both internal DSU and an external link device.
CTS	The Clear To Send (CTS) indicator lights when the composite link is ready to transmit data.
	The CTS indicator lights for both internal DSU and an external link device.
RXT	The Retransmit (RXT) indicator lights when the local MultiMux has received a request to
	retransmit a block of data and is retransmitting that block. The RXT indicator lights for both
	internal DSU and an external link device.

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Contents MultiMux Page MultiMux #MMV1600C #MMV3200C Record of Revisions RevisionDescriptionTable of Contents Troubleshooting CommandsOperating Procedures Service, Warranty and Tech SupportTables AboutThisManual Service, Warranty and Tech Support Background Description of Statistical Multiplexing1.1 Statistical Multiplexing Communications Product DescriptionMultiMux MMV1600/3200 Series Block Diagram Page Dual Composite Links System Features Voice/FaxNetworking Dynamic Load BalanceDiagnostics Channel SwitchingCommand Modem Parameter MemoryDynamic Buffering Response Time ControlSynchronous Data Channel AU7USA-18883-DE-N DSU FCC Regulations for Telephone Line InterconnectionDOC Terminal Equipment AU7USA-20328-MD-EComposite Link Specifications Async Data ChannelsSystem Control Internal DSUCompatibility Voice ChannelsElectrical/Physical DtmfConfiguration Description Model DescriptionConfiguration Configuration 1 Local Site Channel Parameters Configuration 1 Remote Site Channel ParametersConfiguration 1 Composite Link Configuration Configuration 2 Composite Link Configuration Remote Site Configuration 3 Local Site Channel Parameters Configuration 3 Remote Site 1 Channel ParametersConfiguration 3 Remote Site 2 Channel Parameters Configuration 4 FXO to FXS Configuration 4 Local Site Voice/Fax Channel ParametersConfiguration 4 Remote Site Voice/Fax Channel Parameters Configuration 5 E&M Configuration 5 Local site Voice/Fax Channel Parameters Configuration 5 Remote Site Voice/Fax Channel ParametersConfiguration 6 FXS to FXS Configuration 6 Local Site Voice/Fax Channel Parameters Configuration 6 Remote Site Voice/Fax Channel ParametersRemote Site Configuration 7 Local Site Voice/Fax Channel Parameters Configuration 7 Remote Site Voice/Fax Channel ParametersConfiguration 8 LAN to LAN Page StepProcedure InstallationProcedureCabling Procedure External Modem/DSU with RS232C InterfaceSync Data Channel Port B only Step ProcedureV.35 Interface Async ChannelComposite Link Cabling Configuration Procedure Supervisory ConsoleCommand Modem Step Procedure Async Channels Step Procedure Voice/Fax ChannelsPage Command Summary Type Command DescriptionATC1B4800P1F1E0 $DSUBCL SNGA..H$DSUACL $DSUASPCommandDescription General Commands#MA Parameters H command menu is as follows General HelpStore New HelpH6 menu is as follows H4 menu is as followsH5 menu is as follows H7 menu is as followsChannel Parameter Commands ENQ/ACK DTRMLA/B/D SB1 SB2$DSUSP Composite Link Speed and Clocking Commands$DSUCL $ MuxacliAdditional Composite Link Commands $MUXBReport Retransmit TimerList Composite #RBxxxxxVoice/Fax Channel Commands Command Level Local Interface WireSilence Suppression ATV1/2LIFXOATV1/2RIFXO Test CommandsATV1/2LIFXSL ATV1/2RIFXSGCommand Modem Commands T11T12 Configuration of Port a Composite Link MultiMuxOperatingProceduresMultiMux Operating Procedures 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 ImportanceofCompositeStatistics IntroductionTroubleshootingGuide Data Troubleshooting GuideTestCables RD LED on RD OFF Voice/Fax Troubleshooting Guide Voice/fax channelCannot communicate ChannelDeviceTesting Channel Device Testing ProcedureLocal Loop Test #4 DSUandCommunicationsLineTesting DSU and Communications Line Testing ProcedureRemote Digital Loop Test #5 MultiMuxFunctionalTestingProcedures MultiMux Functional Testing ProceduresWatch DOG Test Passed Voice/FaxChannelTesting Voice/Fax Channel Testing ProcedureVOICE/FAX Loopback Test #12 SyncDataChannelTesting Sync Data Channel Testing ProcedureService, Warranty and Tech Support Repair Procedures for International Distributors Ascii Character Code/Hex/Decimal Conversion Chart AppendixASignal Information Negative Positive Appendix BCabling Diagrams Appendix CCommand Port Cables DCE to DTE cablingComposite Link Cabling RJ48 Cabling for Internal DSU Description FXO Description FXS Description RJ45 Spade Lug Wire Color FunctionVoice/Fax Channel Connectors I-V Voice/Fax Channel CableRepeat Command Name DefaultAnswer a LastATO ATH1ATH0 ATQ1Read or ATD5551212RRegister WriteUser Profiles Configuration displaysView Active Store ActiveATX0 ATX1ATX2 Returning to Command ExecutionMode While After DialTable E-1. LED Indicators Indicator DescriptionAppendix E LED Indicators Description Back PanelFCR BPS Modem DIAL-UP Line Connector ON/OFF SwitchPower Connector Command Port TERMINAL/PC ConnectorVOICE/FAX Channel 1 E&M Connector VOICE/FAX Channel 2 FXS ConnectorVOICE/FAX Channel 2 FXO Connector VOICE/FAX Channel 1 FXS ConnectorChannel Board Number of Channels Switch RS232C/V.35 ShuntChannel # Appendix F Flow Control BackgroundOff Printer pacing and Flow Control Glossary of Terms Page Format Page Parameter Page Page Symbols DOC DSUExternal Composite Link FXO FXSLads MultiMux Functional Testing Procedure List Channel Parameters CommandLoad DSU Factory Defaults Command Link ProtocolREN PDNPstn RJ48SStop Bit Command SB1-SB2 Transmit XMT IndicatorStdm Word Length Select Command WL5-8 Voice/Fax Channel Testing ProcedureVoice/Fax Input Level Gain Command Voice/Fax Channels