Multi Tech Equipment MTA128ST manual LED Indicators

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Introduction and Description

LED Indicators

The ten LED indicators on the front panel (see figure below) of the MTA1 28ST/NT report status and line activity.

Transmit Data

Flashes when data is being transmitted (on for a space, off for a mark).

Receive Data

Flashes when data is being received (on for a space, off for a mark). Link

Status

For EuroISDN NET3, INS64, and VN4 switch protocols, lights when the TA is turned on. For US NI-1, DMS- 100, and AT&T 5ESS switch protocols: On Steady, Link with central office is established (requires correct configuration of SPIDs) Flashing, Physical layer is down or one or both SPIDs have not been verified with central office

Bearer Channel 1

When lit, indicates active data or voice connection on bearer channel 1.

Bearer Channel 2

When lit, indicates active data or voice connection on bearer channel 2.

Terminal Ready

Lights to indicate that the computer is communicating with the MTA1 28ST/NT, so the MTA1 28ST/NT can answer an incoming call.

Off Hook

Lights when analog equipment on AUX port is active or off-hook.

128 Kbps

Lights to indicate that the B channels have been multiplexed into a single 128 Kbps communications link.

Data Protocol

Lights in combination with P2 and 128 LEDs to indicate which data protocol (V.110, V. 120, X.75, PPP, MLPPP) is in use as shown in the table below.

Data Protocol

Lights in combination with P1 and 128 LEDs to indicate which data protocol (V.110, V. 120, X.75, PPP, MLPPP) is in use as shown in the table below.

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Contents Page Revision Date Description Model MTA128ST/NT S000305C Rev. CTrademarks Contents Product Description Introduction and DescriptionNT1 Connection FeaturesSpid Service Profile ID Isdn BRI LineInterlace Pin TE SignalPin LED Indicators LED P1 LED P2 LED Connectors Switch CompatibiltiyLED Indicators Command InterfaceSafety Warnings Hardware InstallationConnecting your TA Connect the TA to Your PC RS-232 Connection Before You Start Configuration UtilitiesNetwork Configuration IntroductionVoice TEI Call Control ConfigurationDialing Numbers COM Port SettingsDCD Drop Time Configuring your TA Page Page Page Page Page Page Page Page AT Commands MTA128S T/NT Commands and S-RegistersAT Commands by Function Register Summary Digital Data Call Commands aAnalog Pots Call Commands RegistersAT Commands, S-Registers, and Result Codes Result Codes Using AT Commands to Operate the MTA128ST/NTAnswering a Call Making a CallAnswering Manually Hanging UpAnswering Automatically Introduction Troubleshooting the TASpecific Troubleshooting Situations Troubleshoot ingDebugging/Logging/Troubleshooting Command Summary AT Debugging/Logging/Troubleshooting CommandsDebugging/Logging/Troubleshooting S-Registers None of the LEDs light when the MTA128ST/NTis onMTA128ST/NT does not respond to commands You can place data calls but not voice calls or vice versa MTA128ST/NT dials but cannot make a connectionFile transfer appears slower than it should be MTA128ST/NT cannot connect when answeringYou cannot place two simultaneous data calls MTA128ST/NT disconnects while onlineApple Macintosh Compatibility Dynamic Bandwidth Allocation DBA Bonding Using the &, I and + CharactersMaking PPP/MLPPP Connections Software Applications that can Format PPP DataDBA Data Protocols DBA Features Bandwidth-on-Demand BOD-S60, S61, S62, and S63PPP/MLPPP Warranty Warranty, Service, and Tech SupportRepair Procedures for U.S. and Canadian Customers Repair Procedures for International Distributors Replacement PartsQuick Setup Factory Profiles AppendixAConfiguration ProfilesQuick Setup Example Appendix B Ordering Your Isdn Li ne Bearer ServiceLoop Qualification Using Isdn Ordering Codes IOCs Capability S previously Generic Data M J3 previously Generic Data J-1DNM5 previously Generic Data M-1DN Ordering Isdn Without IOCs Appendices Appendices FCC AppendixC FCCand Canadian RegulationCanadian Limitations Notice Using AT Commands to Configure the MTA128ST/NT AppendixD Configuration MethodsFirmware-based Configuration Utility Configuration via AT CommandsGlossary SymbolGlossary IETFInternet Engineering Task Force PPPMultilink Protocol or MP-is an Internet Glossary TA-Seeterminal adapter Information pages from a central resource. See also Isdn Canadian Regulation 56 Appendix IndexUart