Page 4 - Declaration of Conformity/Supplementary Information; Declaration of Conformity
3 Declaration of Conformity/Supplementary Information Declaration of Conformity The line driver conforms to the following standard(s) or other normativedocument(s); EMC: EN 55022 (1994) Limits and methods of measure-ment of radio disturbance characteristics of informationtechnology equipment. EN 500...
Page 5 - que el aparato eléctrico sea operado.
4 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) 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 d...
Page 6 - NOM STATEMENT
5 NOM STATEMENT 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos,poniendo particular aten...
Page 7 - TRADEMARKS USED IN THIS MANUAL
6 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) TRADEMARKS USED IN THIS MANUAL AS/400 and IBM are registered trademarks of International BusinessMachines Corporation. Any other trademarks mentioned in this manual are acknowledged to be the property of thetrademark owners.
Page 8 - CONTENTS; Contents; Chapter
7 CONTENTS Contents Chapter Page 1. Specifications ............................................................................................. 8 2. Introduction ...............................................................................................102.1 Physical Description ..................
Page 9 - Appendix; Up to 90% noncondensing
8 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) 1. Specifications Compliance: FCC Class A, IC Class/classe A Protocol: Synchronous or asynchronous Clock Source: Internal, external (from attached device), or receive clock derived from the receive signal Flow Control: None Operation: 4-wire, full- or h...
Page 10 - CHAPTER 1: Specifications
9 CHAPTER 1: Specifications Maximum Altitude: 8000 ft. (2438.4 m) Enclosure: High-impact plastic Power: ME444A-R3: Directly from outlet through detachable 5-ft. (1.5-m) power cord (included); Optimal input: 115 VAC, 60 Hz; Input ranges: 103.5 to 126.5 VAC, 47 to 63 Hz; Consumption: 5 watts; ME444AE-...
Page 11 - Physical Description; ). Also available is a rackmount card version
10 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) 2. Introduction The 256-kbps Line Driver is a short-range modem for synchronous orasynchronous transmission—full- or half-duplex—over unconditioned lines. With arange of up to 11.8 miles (19 km), the line driver operates at user-selectablesynchronous d...
Page 12 - for a more detailed
11 CHAPTER 2: Introduction 2.2 Functional Description This section describes the operation of the line driver’s circuit blocks, primarily thecircuits required for correctly configuring the modem (see Figure 2-1 below). Figure 2-1. Line driver block diagram. 2.2.1 E NCODER M ODULATOR The encoder modu...
Page 13 - NOTE; • INT—Internal clock. From the modem’s internal crystal oscillator.; • The RECEIVE FILTER, which removes all the out-band frequencies.
12 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) NOTE I n m u l t i p o i n t a p p l i c a t i o n s , d o n o t u s e t h e 0 - m s e c o p t i o n f o r t h eRTS–CTS delay. 2.2.2 M ODULATION T IMING This circuit supplies the transmit clock to the encoder. Three clock sources areavailable on the XM...
Page 14 - CHAPTER 2: Introduction; Line Driver
13 CHAPTER 2: Introduction 2.2.5 V.54 D IAGNOSTICS V.54 loops are activated manually with the front-panel buttons, or through theDTE interface. The buttons and the DTE interface can be enabled or disabledseparately by jumpers J7 and J8 (shown in Figure 3-1 and described in Table 3-1). When you use t...
Page 16 - CHAPTER 3: Configuration; for how to install it,; Chapter 5; for how; Chapter 6; for how to test the system.; Placement of the Standalone Version; Chapter 4; ) for the pinouts of this connector, and for the pinning of the
15 CHAPTER 3: Configuration 3. Configuration This chapter explains how to configure your standalone or rackmount card linedriver. After you configure it, see Chapter 4 for how to install it, Chapter 5 for how to operate it, and Chapter 6 for how to test the system. 3.1 Placement of the Standalone Ve...
Page 18 - and J
17 CHAPTER 3: Configuration 3.3 Configuring the Standalone or Card Version Before attaching anything to the 256-kbps Line Driver standalone or rackmountcard version, determine which data rate you’re going to use, what the system’sclock source should be, and how you want to set all of the other user-...
Page 22 - and
21 CHAPTER 4: Installation 4. Installation 4.1 Installing the Standalone Version in 19-Inch Racks 4.1.1 O VERVIEW The 256-kbps Line Driver standalone version can be installed in 19-inch racks. It is1U (1.75", 4.4 cm) high and is slightly less than half as wide as the availablemounting area. Two ...
Page 23 - Installing a single unit in a 19-inch rack.; short brackets to the vacant sides of the standalone line drivers.
22 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) Figure 4-1. Installing a single unit in a 19-inch rack. 4.1.3 I NSTALLING T WO S TANDALONE U NITS IN A 19-I NCH R ACK The adapter kit includes two long side rails (one for each unit), which slide intoeach other to fasten the units together, and two sho...
Page 24 - CHAPTER 4: Installation; ends and prevent the units from moving.
23 CHAPTER 4: Installation 4. Secure the included plastic caps to the ends of the rails, to protect the rail ends and prevent the units from moving. 5. You can now use four screws (not supplied with the kit), two on each side, to fasten the assembled units to the side rails of the 19-inch rack. Figu...
Page 25 - Installing the 256-kbps Line Driver Rackmount Card Version
24 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) 4.2 Installing the 256-kbps Line Driver Rackmount Card Version T HE R ACK N EST 2/14 I LLUSTRATED You will be installing the line driver card in the RackNest 2/14 as shownin Figure 4-3. The front and rear panels of the RackNest are shownin Figure 4-4; ...
Page 29 - not
28 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) 6. Run twisted-pair cable between the local and remote cards. Attach one pair of wires to the corresponding XMT terminals (“TB1”) on the back ofthe local RackNest and the corresponding RCV terminals on the remoteRackNest; attach the other pair of wires...
Page 30 - SIGNAL
29 CHAPTER 4: Installation Table 4-2. Pinout of the RackNest 2/14’s DB25 connector when ME445C-530 is installed or RS-530 standalone’s DB25 connector. SIGNAL ITU-TSS LEAD DB25 NAME (ABBREV.) CIRCUIT TYPE PIN Shield (SHD) 101 1 Signal Ground (SGND) 102 7 Transmitted Data (TD) 103 A 2 B 14 Received Da...
Page 34 - The power connection provides AC voltage to the line driver.
33 CHAPTER 4: Installation 4.3 Connecting Data Cables After you set the standalone line driver’s internal controls, it’s ready to be cabledfor operation. Its electrical connectors are located on its rear panel. These consist of a femaleV.35 interface connector labeled “DTE,” a 5-screw terminal block...
Page 35 - All connections are made on the back of the line driver.
34 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) fuse rated for the required amount of current. You must avoid using repaired fusesor short-circuiting the fuse holders. The fuse, and one replacement fuse, arelocated in the top part of the mains connector on the line driver’s rear panel. Thenominal cu...
Page 36 - Your line driver should now be ready for continuous operation.
35 CHAPTER 4: Installation To connect the line driver to a V.35 DTE or DCE, use an appropriate cable that ispinned correctly (straight-through for DTE, properly crossed for DCE). Run thiscable from the other device to the line driver and attach it to the line driver’sinterface connector. Your line d...
Page 37 - Controls and Indicators
36 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) 5. Operation This chapter contains a list of the controls and indicators and their functions, aswell as a brief description of how to operate the unit. Installation procedures mustbe completed and checked before you attempt to operate the line driver. ...
Page 38 - Figure 5-2. The front panel of the rackmount card line driver.
37 Figure 5-2. The front panel of the rackmount card line driver. Table 5-1. The controls. The Item labels in this table correspond to those in Figures 5-1 and 5-2. ITEM CONTROL FUNCTION A DIG Pressing the local digital loopback button causes the local LDM-MR256 to loop received data and clock to it...
Page 39 - Operating Procedure
38 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) Table 5-2. The indicators. The item numbers in this table correspond to Figures 5-1 and 5-2. ITEM INDICATOR FUNCTION 1 PWR Green LED is on when power is on. 2 RTS Yellow LED is on when terminal activates Request to Send. 3 TD Yellow LED is on when stea...
Page 40 - CHAPTER 6: Troubleshooting
39 CHAPTER 6: Troubleshooting 6. Troubleshooting This chapter explains system-test and fault-isolation procedures. The line driver provides local loopback and remote digital loopback in compliancewith the V.54 standard. Unless you disable them, the unit’s loopback tests can beactivated manually from...
Page 42 - LEDs are still lit and that the ERR LED lights briefly.; Local Analog Loopback
41 6.3 The Modem Self-Test To verify that the line driver itself is operating correctly, initiate the modem self-test by pressing the PATT and ANA buttons (refer to Figure 6-3 below): 1. Press ANA to start local analog loopback. Both the TEST and DCD LEDs should light. If the DCD LED doesn’t light, ...
Page 45 - Local Digital Loopback; • Hook up an external BERT unit in place of the remote DTE or
44 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) Figure 6-5. Remote digital loopback. 6.6 Local Digital Loopback Activate the local digital loopback test by pressing the DIG button on the linedriver’s front panel. This test involves creating an outbound loopback at the localline driver (see Figure 6-...
Page 46 - button to its normal position.; Calling Black Box; • the nature and duration of the problem.
45 CHAPTER 6: Troubleshooting 4. After the test is complete or the fault has been corrected, restore the DIG button to its normal position. Figure 6-6. Local digital loopback. 6.7 Calling Black Box If you determine that your line driver is malfunctioning, do not attempt to alter orrepair the unit. I...
Page 47 - Shipping and Packaging; If you need to transport or ship your line driver:
46 256-KBPS LINE DRIVER (V.35, RS-530, OR X.21) 6.8 Shipping and Packaging If you need to transport or ship your line driver: • Package it carefully. We recommend that you use the original container. • If you are shipping the line driver for repair, make sure you include its power cord. If you are r...
Page 48 - Appendix: Maximum Distances; APPENDIX: Maximum Distances
47 Appendix: Maximum Distances The maximum distance that a pair of line drivers can communicate across willvary depending on the data rate and the thickness (gauge) of the wires. Inmultipoint applications, it will also vary depending on the number of slaveson the line. Approximate maximum distances ...
Page 49 - © Copyright 2004. Black Box Corporation. All rights reserved.
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 2004. Black Box Corporation. All rights reserved.
