Black Box ME800A-R4 User Manual Download Page 15

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Chapter 4: Troubleshooting

4. Troubleshooting

If the units fail to operate, check the following before calling for technical support.

1. Are the units powered on? Check to see if the power supplies are plugged into

a working AC outlet.

2. Check to see if the interconnect wire is connected properly, TX+ to RX+, TX- to

RX-, at both ends.

3. Check that switch S3 is set for the proper cable length.

4. If hardware control is enabled, DTR and RTS must be high to enable data

transmission to the remote unit.

5. Check that the loopback switch S2 is in the Normal position.

Summary of Contents for ME800A-R4

Page 1: ...U S Call 877 877 BBOX outside U S call 724 746 5500 FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Law...

Page 2: ...s Used in this Manual Black Box and the Double Diamond logo are registered trademarks of BB Technologies Inc UL Is a registered trademark of Underwriters Laboratories Any other trademarks mentioned in...

Page 3: ...may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment This digit...

Page 4: ...etes que impidan el flujo de aire por los orificios de ventilaci n 10 El equipo el ctrico deber ser situado fuera del alcance de fuentes de calor como radiadores registros de calor estufas u otros apa...

Page 5: ...ci n 18 Servicio por personal calificado deber ser provisto cuando A El cable de poder o el contacto ha sido da ado u B Objectos han ca do o l quido ha sido derramado dentro del aparato o C El aparato...

Page 6: ...Page 6 724 746 5500 blackbox com Table of Contents Table of Contents 1 Specifications 7 2 Introduction 8 3 Installation 10 4 Troubleshooting 15...

Page 7: ...ISO 2110 Connectors 1 DB9 female 1 4 position terminal block 1 RJ 11 1 DC power jack Indicators TX This dual Red Green LED will be green when the Receive Data is low and red when the Receive Data is h...

Page 8: ...pair cable using a 4 position terminal block or RJ 11 The units are optically isolated to provide protection from differences in ground potential between the units The units provide line status Data...

Page 9: ...ed when the Received Data is high 3 2 RX LEDs This LED can be used to verify proper polarity of the interconnecting lines it should be green when no data is being transmitted Red indicates improper li...

Page 10: ...the 4 wire terminal block 4 Once the modems are connected together connect DB9 cables to equipment and power up the converters 5 Next power up your equipment For testing purposes a loopback function...

Page 11: ...itted Data Input Output 4 Data Terminal Ready Input Output 5 Signal Ground Ground Ground 6 Data Set Ready Output Pulled High Input Pulled High 7 Request To Send Input connected to pin 8 Output connect...

Page 12: ...ch DTE DCE S2 2 position push button switch loopback Push button will be in out position for loopback S3 4 position DIP switch option switches Table 3 4 S1 switch Position Function See description of...

Page 13: ...OFF Line Distance Note 2 Short less than 1000 ft OFF OFF Reserved OFF NOTES 1 When hardware control is enabled both control input signals must be high for transmission to be enabled 2 The long and sh...

Page 14: ...or Function TX The Green LED is on when the Receive Data is low and the Red LED is on when the Receive Data is high RX This LED can be used to verify proper polarity of the interconnecting lines it sh...

Page 15: ...Check to see if the power supplies are plugged into a working AC outlet 2 Check to see if the interconnect wire is connected properly TX to RX TX to RX at both ends 3 Check that switch S3 is set for...

Page 16: ...ind everything from cabinets and racks and power and surge protection products to media converters and Ethernet switches all supported by free live 24 7 Tech support available in 30 seconds or less Co...