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February 20040049-0519-500 MD1980C Fast Poll RM Rack-Mount Modem

SW1-1 through SW1-4 − Transmit Level Switches SW1-1 through SW1-4 adjust the modem’s transmit level. Table 2-2 shows the transmit levels you can sele

Configuring the Modem SW1-8 − Anti-streaming SW1-8 ON = Anti-streaming active OFF = Anti-stream inactive Typically, anti-streaming is used in multi-

 No provisions for disablement of echo suppressors  DTR (circuit 108) is ignored Setting SW2-1 OFF selects Bell 202 mode. SW2-2  Receiver Squel

Configuring the Modem When the modem is configured for V.23 operation (SW2-1 ON), the RTS-CTS delay is fixed at 33 ms. SW2-6  FSK CD Delay (Bell 202

SW3 DIP Switch Settings SW3 is a 10-position DIP switch. Table 2-5 shows the modem switch settings for DIP switch SW3. A description of the SW3 switc

Configuring the Modem Note that DRS controls both the transmitter and receiver. If DRS changes states while the modem is receiving a preamble, data, o

SW3-6 − Reserved (Test Only) SW3-6 Must be OFF SW3-6 must be in the OFF position for normal operation. SW3-7 − 2-/4-Wire Operation SW3-7 ON = 2-W

Installing the Modem Installing the Modem After you set the modem’s configuration switches, you can install it in a slot within a BLACK BOX® Modem Rac

Figure 2-4. Modems Installed in the Rack Connecting to a Transmission Line The modem cage or modem rack has different Telco options. Your version ma

LEDs LEDs The front panel of the modem provides the LEDs shown in Table 2-7. Table 2-7. Modem LEDs LED Color Description Power Green Power RTS Yello

Contents CHAPTER 1 INTRODUCTION...3 F

Figure 2-6. Loopback Diagnostics Page 20

Appendix A Troubleshooting I n the event you encounter a problem using your Black Box modem, refer to the troubleshooting information in this appendix

Appendix B Specifications General Specifications Data rate: 9600, 4800, or 0-1800 bps asynchronous Data format: 8 or 9 data bits with 1 or more stop

Mechanical Specifications Anti-Streaming: 27-second timer to prevent transmitter lock-up network Mechanical Specifications Dimensions: 9 inches deep

Environmental Specifications Operating temperature: -40 to + 85o C Storage temperature: -40 to +125o C Operating humidity: 5 to 95 %, non-conde

Appendix C Compliances FCC REQUIREMENTS FOR TELEPHONE-LINE EQUIPMENT 1. The Federal Communications Commission (FCC) has established rules which permi

Repairs to certified equipment should be made by an authorized Canadian maintenance facility—in this case, your supplier. Any repairs or alterations

NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 8. Servicio—El usuario no debe intentar dar servicio al equi

Chapter 1 Introduction C ongratulations for purchasing the finest industrial-grade fast-poll rack-mount modem available. Thfule BLACK BOX® MD1980C m

Features Though functionally similar to commercial modems, the MD1980C provides the following unique features that make it well suited for utility an

Ancillary Documentation Ancillary Documentation For information about the Black Box Modem Rack II, refer to the documentation that came with it.Page 5

Chapter 2 Installation T his chapter describes how to install the modem. Unpacking Your Hardware Your package should include:  At least one BLACK

Hardware Overview Hardware Overview Front View Figure 2-1 shows a front view of the BLACK BOX® MD1980C modem. Starting from the top, this view shows:

Component View Figure 2-2 shows the component view of the modem. This view shows:  Three configuration switch blocks, designated SW1, SW2, and SW3.

Configuring the Modem Configuring the Modem You configure the modem using the three sets of DIP switches on the bottom of the modem. , IMPORTANT It i