Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Related Manuals for Black Box MD1970A
Summary of Contents for Black Box MD1970A
- Page 1 February 2004 0049-0119-500 MD1970A / MD1970A-DC /MD1970C Modem...
-
Page 2: Table Of Contents
Self Test or Test Pattern..................12 DTE ............................12 ONNECTING A ................12 ONNECTING TO A RIVATE OMMUNICATION IRCUIT Connecting to a DC Power Source (MD1970A-DC) ................12 Connecting to an AC Power Source (MD1970C) ..................13 3 LED .......................14 HAPTER S AND ONTROLS ............................14... -
Page 3: Chapter 1 Introduction
Models The BLACK BOX® modems are available in three models: The MD1970A is a desktop modem that comes with an AC power adapter for 115/230 VAC. The MD1970A-DC is a desktop modem that uses DC power. The MD1970C is a rack-mount modem that installs into a standard 19-inch rack. -
Page 4: Chapter 2 Installing The Modem
Unpacking Your Hardware Your package should include at least one MD1970A or MD1970C modem, one RJ-45 jack-to-4 wire leased line cable, and this Installation Guide. If your package contents are damaged or missing, please contact your place of purchase immediately. - Page 5 One Power LED and six status LEDs (see page 14) A rotary test switch (see page 14) On the back panel of the BLACK BOX® MD1970A modem, there are: A power cord or power input connector A power switch for turning the modem on and off...
-
Page 6: Configuring The Modem
Installing the Modem Configuring the Modem The modem obtains some operating characteristics from jumper settings. The default jumper settings are for common 4-wire full-duplex applications. To reconfigure the modem for 2-wire half-duplex and special applications, you must change the default jumper settings. To change jumper settings, push the two tabs on the back of the modem to open the modem cover and gain access to the jumper settings on the printed circuit board (see Figure 2-4). - Page 7 Installing the Modem Figure 2-5. Modem Jumper Locations Page 7...
- Page 8 Installing the Modem Table 2-1. Jumper Settings Jumper Function Settings See Page… Carrier Detect control -33 dBm -43 dBm Transmit level 0dBm -2 dBm -4 dBm -6 dBm -8 dBm -10 dBm -12 dBm -14 dBm 2-wire/4-wire mode 2-wire 4-wire Call turnaround squelch Enabled Disabled...
-
Page 9: Jumper S1 − Carrier Detect Control
Installing the Modem − Jumper S1 Carrier Detect Control -33 dBm (default) Settings: -43 dBm Jumper S1 configures the dynamic range of the modem receiver. The selections are either –33 dBm or –43 dBm. If the incoming signal is above –24 dBm, use the default –33 dBm setting. If the modem is operated on the network, use the –43 dBm setting. -
Page 10: Jumper S5 − Transmit Carrier
Installing the Modem For 4-wire, full-duplex communications, keep the jumper set to the default position of Disabled. − Jumper S5 Transmit Carrier Settings: Control (default) Constant Jumper S5 places the transmitter under terminal control (default) or turns on the transmitter continuously in a 2-wire half duplex system. -
Page 11: Jumper S10 − Carrier Detect Delay
Installing the Modem − Jumper S10 Carrier Detect Delay 6 ms (default) Settings: 23 ms Jumper S10 configures the modem’s Carrier Detect turn on Delay timing. The delay chosen must be consistent with the Clear To Send delay selection of the transmitting modem and must be less than the CTS delay. The available delays are 6 ms (default) and 23 ms. -
Page 12: Jumpers S14 And S15
Connecting to a DC Power Source (MD1970A-DC) The MD1970A-DC back panel accepts a DC voltage source from 10 to 53 VDC and provides 500 Volts isolation. Figure 2-3 on page 5 shows this connector. The MD1970A-DC modem comes with a grounded power cable for attaching the modem to an acceptable DC power source. -
Page 13: Connecting To An Ac Power Source (Md1970C)
Connecting to an AC Power Source (MD1970A) The MD1970A comes with an AC power adapter that connects to a 115/230 VAC power source. On the secondary voltage side, the power adapter connects to the power block on the back of the modem. When making this connection to the modem, align the power adapter with the positive and negative markings on the modem rear panel. -
Page 14: Leds And Controls
Chapter 3 LEDs and Controls his chapter describes the LEDs and controls on the modem. Front Panel LEDs Table 3-1 describes the LEDs on the modem front panel. Table 3-1. Front Panel LEDs Status ON = power is being supplied to the modem. ON = the rotary switch is turned to Analog or Digital Loopback, or the switch is in the Test Pattern transmit mode or Self Test mode and no error is detected. - Page 15 LEDs and Controls active. See Figure 3-4. The TM LED goes ON when the receive data is good. If there are errors, or if the received data does not compare with the transmitted data, the TM LED goes off. The RS-232-C interface lines to the receiver are active during this mode.
- Page 16 LEDs and Controls Modem Self Test Mode TEST PATTERN TRANSMITTER Amplifier ERROR CHECK RECEIVER 4-Wire Telephone Line Self Test Figure 3-3. Self Test Remote Modem Receive Test Pattern Mode Local Modem Send Test Pattern Mode SPEED SELECT TEST ERROR TRANSMITTER RECEIVER PATTERN CHECK...
-
Page 17: Chapter 4 Troubleshooting
Chapter 4 Troubleshooting his chapter describes troubleshooting procedures you can use in the unlikely event you encounter a problem with your modem. Local Modem Test The local modem test verifies the local modem’s transmitter, receiver, and connection to the locally attached DTE. This test can be run either by generating a data pattern from the locally attached DTE or by having the modem generate a test pattern. -
Page 18: Chapter 5 Specifications
7.00 inches (17.8 cm) Length: 9.60 inches (24.4 cm) Height: 2.25 inches (5.7 cm) Temperature Range Operating: -40 to +85 degrees Celsius (MD1970A and MD1970C) to 50 Celsius (MD1970A-DC) Storage: -40 to +85 degrees Celsius Humidity range: 95% relative, non-condensing... -
Page 19: Power Requirements
115 VAC + or – 10%: 50/60 Hz 230 VAC + or – 10%: 50/60 Hz 12 to 60 VDC For applicable models. DC Power Requirements (MD1970A-DC) 10 to 53 Volts DC DC Power Supply Voltage: 500 mA at 12 Volts... -
Page 20: Appendixa Compliances
Appendix A Compliances FCC REQUIREMENTS FOR TELEPHONE-LINE EQUIPMENT 1. The Federal Communications Commission (FCC) has established rules which permit this device to be directly connected to the telephone network with standardized jacks. This equipment should not be used on party lines or coin lines. -
Page 21: Federal Communications Commission And Canadian Department Of Communications Radio Frequency Interference Statements
Compliances Repairs to certified equipment should be made by an authorized Canadian maintenance facility—in this case, your supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the telecommunications company cause to request the user to disconnect the equipment. Users should ensure for their own protection that the electrical ground connections of the power utility, telephone lines, and internal metallic water pipe system, if present, are connected together. - Page 22 7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante. 8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las instrucciones de operación. Todo otro servicio deberá ser referido a personal de servicio calificado. 9.
Need help?
Do you have a question about the MD1970A and is the answer not in the manual?
Questions and answers