ME657A-F ME658A-F ME659A-F MAY 1995 ME657A-M ME658A-M ME659A-M Multi-Function Line Drivers ctioner n u F MultiLine Driv CUSTOMER SUPPORT INFORMATION Order toll-free in the 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, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.
FCC AND IC STATEMENTS, TRADEMARKS FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication.
MULTI-FUNCTION LINE DRIVER NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas. 4. Todas las instrucciones de operación y uso deben ser seguidas. 5.
NOM STATEMENT 11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indique en el aparato. 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13.
MULTI-FUNCTION LINE DRIVER Contents Chapter Page 1. Specifications ............................................................................................. 1 2. Introduction ............................................................................................... 4 2.1 Overview .............................................................................................. 4 2.2 Features ............................................................................................... 4 3.
CHAPTER 1: Specifications 1. Specifications Cable Required — For modem-to-modem line: Two- or four-wire unconditioned twisted-pair, 19 to 26 AWG (see Appendix A), pinned as shown in Section 4.1.2 Compliance — FCC Part 15 Class A, DOC Class/MDC classe A Interfaces — Serial: EIA RS-232/ITU-TSS [CCITT] V.
MULTI-FUNCTION LINE DRIVER Surge-Protection Method — Silicon Avalanche Diodes Surge-Response Time — 1 ps Maximum Surge Protection — 600 watts dissipated after 1 ms User Controls — (2) Top-mounted toggle switches: LOOP (Remote Digital or Local Analog loopback), BERT (511 or 511/E V.
CHAPTER 1: Specifications ME659A-M: (1) RJ-45 female for modem-to-modem line, (1) DB25 male for serial connection; ME659A-F: (1) RJ-45 female for modem-to-modem line, (1) DB25 female for serial connection Temperature — 32 to 140˚F (0 to 60˚C) Humidity — 0 to 95% noncondensing Maximum Altitude — 15,000 ft. (4572 m) Power — From EIA RS-232 interface; Consumption: 56 to 70 mW Size — 0.8"H x 2.1"W x 3.6"D (2 x 5.3 x 9 cm) Weight — 2 oz. (56.
MULTI-FUNCTION LINE DRIVER 2. Introduction 2.1 Overview The Multi-Function Line Driver (MFLD) is a carrier-controlled short-range modem that requires no AC power or batteries. The MFLD operates across two wires (half-duplex) or four wires (full- or half-duplex), communicating with DTEs synchronously or asynchronously, up to a maximum range of 12 miles (19.3 km). You can set the MFLD to any of twelve data rates from 1.2 to 38.4 Kbps.
CHAPTER 3: Configuration 3. Configuration This chapter describes the locations and posssible settings of the MultiFunction Line Driver’s DIP configuration switches, and provides detailed instructions for setting them. Once you’ve configured the Multi-Function Line Driver, it is designed to operate reliably and transparently, without needing to be frequently reconfigured. Just set it and forget it! 3.
MULTI-FUNCTION LINE DRIVER ON ON 1 2 3 4 5 6 7 8 OFF Figure 3-2. The ON and OFF settings of the DIP switches. 3.2 Configuration Switch “SW1” Use the individual positions on DIP switch SW1 to set data rate, clock source, sync vs. async protocol, and carrier-control method. The factory-default settings are summarized in Table 3-1 below. Table 3-1.
CHAPTER 3: Configuration SW1 Positions 1 through 4: Data-Rate Setting Set positions 1 through 4 of switch S1 to determine the data rate (valid for both synchronous and asynchronous protocols) of the Multi-Function Line Driver. SW1-1 On Off On Off On Off On Off On Off On SW1-2 On On Off Off On On Off Off On On On SW1-3 On On On On Off Off Off Off On On Off SW1-4 Data Rate On 1.2 Kbps On 1.8 Kbps On 2.4 Kbps On 3.6 Kbps On 4.8 Kbps On 7.2 Kbps On 9.6 Kbps (default) On 14.4 Kbps Off 19.2 Kbps Off 28.
MULTI-FUNCTION LINE DRIVER SW1 Position 8: Carrier-Control Method Set position 8 of switch SW1 to determine whether the carrier is “constantly on” or “controlled by RTS.” In the “controlled by RTS” setting, the Switch can support switched-carrier, multipoint, or hardware flow-control applications. SW1-8 Carrier Off Constantly ON (default) On Controlled by RTS 3.
CHAPTER 3: Configuration SW2 Positions 1 and 2: Word Length Set positions 1 and 2 of switch SW2 to determine the word length that the Multi-Function Line Driver will expect for synchronous or asynchronous data. For example, if you are using the most common data format (1 start bit, 8 data bits, 1 stop bit, and no parity), you would use the factory-default wordlength setting (10 bits).
MULTI-FUNCTION LINE DRIVER SW2 Positions 6 and 7: 2-Wire vs. 4-Wire Operation Set position 6 of switch SW2 to determine whether the Multi-Function Line Driver operates in 2-wire or 4-wire mode. (For 2-wire mode to work, SW1 position 8 must be ON.) In 4-wire mode, set position 7 of switch SW2 to determine whether the MFLD operates in full duplex or half-duplex. SW2-6 On On Off SW2-7 On Off On Operation 4-wire half-duplex 4-wire full duplex 2-wire (half-duplex only) SW2 Position 8: V.52 and V.
CHAPTER 4: Installation 4. Installation Once the Multi-Function Line Driver is properly configured, you can connect it to your system. This chapter describes how to run twisted-pair cable between your MFLDs and how to connect MFLDs to RS-232 equipment. 4.1 The Modem-to-Modem Line Cables and Connectors The Multi-Function Line Driver supports data-only communication between two RS-232 devices at distances to 12 miles (19.3 km) and data rates to 38.4 Kbps.
MULTI-FUNCTION LINE DRIVER 4.1.1 MODEM-TO-MODEM CABLING FOR THE ME657 MODELS If your application requires that you run a pair or two of bare wires between Multi-Function Line Drivers, you must use terminal-block-type MFLDs (ME657 models). To install the twisted-pair cabling, follow these steps: 1. Open the unit by gently inserting a screwdriver into the special pry slot on the plastic case (shown below).
CHAPTER 4: Installation 3. Strip the insulation on back about a quarter of an inch (0.6 cm) from the ends of the twisted-pair wires, as shown below for a four-wire cable: 4A. Four-wire installation only: Connect one pair of wires to the two terminal-block positions (poles) marked XMT (transmit). (In four-wire applications, the Multi-Function Line Driver isn’t polarity-sensitive, so you can connect either wire to either pole.) Connect the other pair of wires to the two RCV (receive) poles.
MULTI-FUNCTION LINE DRIVER 6. When you finish connecting the wires to the terminal block, the assembly should look something like this (four-wire installation shown): XMT G RCV 7. Place the two halves of the strain-relief assembly on either side of the twisted-pair cable and press them together very lightly. Slide the assembly so that is is about 2" (5.
CHAPTER 4: Installation 8. Insert the strain-relief assembly with the wire going through it into the slot in the bottom of the modem case, and set it into the recess of the case, as shown below for a four-wire installation: XMT G RCV 9. Bend the top half of the MFLD’s enclosure as necessary to place it over the strain-relief assembly, as shown below, but do not snap the case together yet: 10.
MULTI-FUNCTION LINE DRIVER 4.1.2 MODEM-TO-MODEM CABLING FOR THE ME658 AND ME659 MODELS If your application requires that you run cables with RJ-11 or RJ-45 connectors between Multi-Function Line Drivers, you must use RJ-11-type (ME658 models) or RJ-45-type (ME659 models) MFLDs respectively. The modem-tomodem cable must be specially cross-pinned, as shown in Table 4-1 and Figure 4-1 on the next page. If your cabling includes punchdown blocks, you can easily do the cross-pinning at a punchdown block.
CHAPTER 4: Installation Table 4-1. Line-Cable Pinouts RJ-11 (Four-Wire) SIGNAL PIN# COLOR* COLOR* GND** RCV† XMT XMT RCV GND** 1 2 3 4 5 6 Blue..................................................White Yellow ..............................................Red Green...............................................Black Red ..................................................Yellow Black ................................................Green White................................................
MULTI-FUNCTION LINE DRIVER 4.2 RS-232 Serial Connections The Multi-Function Line Driver’s RS-232 port is a standard DB25 connector (pinout shown in Table 4-2 below). See Section 4.2.1 if you want to connect the MFLD to a DTE (PC or printer) device. See Section 4.2.2 if you want to connect the MFLD to a DCE (modem) device. Table 4-2. Pinout of the RS-232 Interface DIRECTION STANDARD RS-232/V.
CHAPTER 4: Installation 4.2.2 CONNECTING THE MFLD TO A DCE DEVICE Because the Multi-Function Line Driver is wired as a DCE device, you can’t plug it directly into another DCE (modem, multiplexor, etc.) device. If you must make such a connection, use a null-modem cable pinned according to Table 4-3 below. Because the MFLD is interface-powered, this cable should be as short as possible (we recommend 6 ft. [1.8 m] or less).
MULTI-FUNCTION LINE DRIVER 5. Operation and Diagnostics Once you have configured each Multi-Function Line Driver and connected the cables, you are ready to operate the units. They should operate transparently, as if there were a standard cable connection between the two destination devices. The MFLD has no “ON/OFF” switch, because it draws its operating power from the data and control signals it receives.
CHAPTER 5: Operation and Diagnostics 5.1.1 THE TEST INDICATOR The green Test LED is the LED closer to the LOOP switch. It lights to indicate that V.52 or V.54 tests are running. 5.1.2 THE ERROR INDICATOR The red Error LED is the LED closer to the BERT switch. While the MFLD is in test mode (the Test LED is lit), the Error LED glows red when bit errors occur. 5.2 Test Switches The Multi-Function Line Driver has two top-panel slide switches (shown in Figure 5-1 on the previous page).
MULTI-FUNCTION LINE DRIVER 5.3.1 LOCAL ANALOG LOOPBACK (LAL) The Local Analog Loopback (LAL) test checks the operation of the local Multi-Function Line Driver, and is performed separately on each unit. Any data sent to the local Multi-Function Line Driver in this test mode will be echoed back (returned) to the user device. For example, characters typed on the keyboard of a terminal will appear on the terminal’s screen. To perform an LAL test, follow these steps: 1. Activate LAL.
CHAPTER 5: Operation and Diagnostics 5.3.2 REMOTE DIGITAL LOOPBACK (RDL) The Remote Digital Loopback (RDL) test checks the performance of both the local and remote Multi-Function Line Drivers, and the communication link between them. Any characters sent to the remote MFLD in this test mode will be echoed (returned) back to the originating device.
MULTI-FUNCTION LINE DRIVER 5.3.3 USING THE V.52 BERT TEST INDEPENDENTLY The Multi-Function Line Driver can perform its V.52 BERT test independently of the V.54 loopback tests. This requires two operators: one to initiate and monitor the test at the local MFLD, and one to do the same at the remote MFLD. To use the V.52 BERT test by itself, both operators should simultaneously follow these steps: 1. Move the left-hand top-panel slide switch labeled “BERT” to the “511” (down) position.
CHAPTER 6: Troubleshooting 6. Troubleshooting 6.1 Calling Black Box If you determine that your Multi-Function Line Driver is malfunctioning, do not attempt to alter or repair it. Contact Black Box. The problem might be solvable over the phone. Before you do, make a record of the history of the problem. Black Box will be able to provide more efficient and accurate assistance if you have a complete description, including: • The nature and duration of the problem. • When the problem occurs.
MULTI-FUNCTION LINE DRIVER Appendix A: Cable Recommendations The Multi-Function Line Driver has been performance-tested using twistedpair cable with these characteristics: Wire Gauge Capacitance Resistance 19 AWG 22 AWG 24 AWG 26 AWG 83 nf/mi. or 15.72 pf/ft.* 83 nf/mi. or 15.72 pf/ft.* 83 nf/mi. or 15.72 pf/ft.* 83 nf/mi. or 15.72 pf/ft.* 16.3 Ω/1000 ft. (53.5 Ω/km) 32.6 Ω/1000 ft. (107 Ω/km) 51.65 Ω/1000 ft. (169.5 Ω/km) 82.35 Ω/1000 ft. (270.2 Ω/km) *Alternatively, 51.6 nf/km or 51.
APPENDIX A: Cable Recommendations To gain optimum performance from the Multi-Function Line Driver, please keep these guidelines in mind: • Always use twisted-pair cable—this is not an option. • Use twisted-pair cable with a capacitance of 20 pf/ft. (65.6 pf/m) or less. • Avoid twisted-pair cable thinner than 26 AWG (that is, avoid higher AWG numbers than 26).
MULTI-FUNCTION LINE DRIVER Appendix B: Block Diagram 28
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