Black Box ME445C-X.21 manual

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.com MARCH 200[...]

1 FCC AND IC RFI ST A TEMENTS FEDERAL COMMUNICA TIONS COMMISSION AND INDUSTR Y CANADA RADIO FREQUENCY INTERFERENCE ST A TEMENTS 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 communic[...]

2 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) Safety W arnings Always observe standard safety precautions during installation, operation, and maintenance of this product. Only qualified and authorized service personnel should adjust, maintain, or repair this instrument. Do not attempt to adjust, maintain, or repair the equipment. T elecommunicati[...]

3 Declaration of Conformity/Supplementary Information Declaration of Conformity The line driver conforms to the following standard(s) or other normative document(s); EMC: EN 55022 (1994) Limits and methods of measure- ment of radio disturbance characteristics of information technology equipment. EN 50082-1 (1992) Electromagnetic compatibility— Ge[...]

4 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY ST A TEMENT 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 futu[...]

5 NOM ST A TEMENT 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 atención a los contactos y receptáculos donde s[...]

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 Business Machines Corporation. Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners.[...]

7 CONTENTS Contents Chapter Page 1. Specifications ............................................................................................. 8 2. Introduction ...............................................................................................10 2.1 Physical Description ................................................................[...]

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 half-duplex, point-to-point or multipoint Data Rat[...]

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-R3: Directly from outlet through detachable 5-ft. [...]

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 or asynchronous transmission—full- or half-duplex—over unconditioned lines. With a range of up to 11.8 miles (19 km), the line driver operates at user-selectable synchronous data rates from 19.2 to 256 kbps or asynchr[...]

11 CHAPTER 2: Introduction 2.2 Functional Description This section describes the operation of the line driver’s circuit blocks, primarily the circuits 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 modulator receives data from the DTE, then modulate[...]

12 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) NOTE In multipoint applications, do not use the 0-msec option for the RTS–CTS delay. 2.2.2 M ODULATION T IMING This circuit supplies the transmit clock to the encoder. Three clock sources are available on the XMT CLK jumper (J3): • INT—Internal clock. From the modem’s internal crystal oscilla[...]

13 CHAPTER 2: Introduction 2.2.5 V.54 D IAGNOSTICS V.54 loops are activated manually with the front-panel buttons, or through the DTE interface. The buttons and the DTE interface can be enabled or disabled separately by jumpers J7 and J8 (shown in Figure 3-1 and described in Table 3-1). When you use the line driver as a tail-end to a digital networ[...]

14 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) Figure 2-3. T ail-cir cuit application. Figure 2-4. Multipoint application. Sync host Sync host CSU/DSU DDS (56 kbps) External clock 4-wire twisted pair Receive clock CSU/DSU Tail circuit 256-kbps Line Driver 256-kbps Line Driver IBM ® S/3X mainframe V.35 interface V.35 cable 4-wire twisted pair (64[...]

15 CHAPTER 3: Configuration 3. Configuration This chapter explains how to configure your standalone or rackmount card line driver. 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 V ersion Place the 256-kbps Line Driver standalone [...]

16 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) D ESCRIPTION OF THE R ACK N EST 2/14’ S P OWER S UPPLY The 115-VAC RackNest 2/14 (our product code RM110A) uses the PS1000A power supply, which accepts 115-VAC input power. The 230-VAC RackNest 2/14 uses power supply PS1000AE, which accepts 230-VAC input power. Each of these power supplies consists[...]

17 CHAPTER 3: Configuration 3.3 Configuring the Standalone or Card V ersion Before attaching anything to the 256-kbps Line Driver standalone or rackmount card version, determine which data rate you’re going to use, what the system’s clock source should be, and how you want to set all of the other user-configurable options on the line driver. (R[...]

18 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 3-1 (continued). User-configurable options. Element Function Possible Standard Settings Factory Setting J4 Select the delay in milliseconds that 0 RTS-CTS occurs during RTS-to-CTS transitions. 9 9 ms DLY jumper Do not select 0 for multipoint applications. 70 J5 Turn V.54 delay ON or OFF. When [...]

19 CHAPTER 3: Configuration Figure 3-1. Layout of the 256-kbps Line Driver circuit boar d.[...]

20 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) When you have everything at least tentatively decided, take these steps to set the unit’s internal controls. CAUTION! Disconnect the standalone line driver from the power line before removing it from its housing. W ARNING: HIGH VOL T AGE! Any adjustment, maintenance, and repair of the open instrume[...]

21 CHAPTER 4: Installation 4. Installation 4.1 Installing the Standalone V ersion in 19-Inch Racks 4.1.1 O VERVIEW The 256-kbps Line Driver standalone version can be installed in 19-inch racks. It is 1U (1.75", 4.4 cm) high and is slightly less than half as wide as the available mounting area. Two rack-adapter kits are available as special quo[...]

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 into each other to fasten the units together, and two short side brackets, which hold the two line driver[...]

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. Figure 4-2. Installing two units in a 19-inch rack.[...]

24 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 4.2 Installing the 256-kbps Line Driver Rackmount Card V ersion T HE R ACK N EST 2/14 I LLUSTRATED You will be installing the line driver card in the RackNest 2/14 as shown in Figure 4-3. The front and rear panels of the RackNest are shown in Figure 4-4; the numbered connectors, controls, and indicat[...]

25 CHAPTER 4: Installation Figure 4-4. The RackNest 2/14 illustrated. GND RCV XMIT ON 1 7 2 5 3 4 6[...]

26 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 4-1. Descriptions of RackNest 2/14 components. Item Control, Indicator , or Connector Function 1 Card Slots Slots for installation of compatible cards (slot no. 1 located at the left-hand side). Unused slots are closed with blank panels. 2 Power-Supply Module Provides power to modules installe[...]

27 CHAPTER 4: Installation After you install the RackNest 2/14 in your 19" rack (refer to the RackNest’s manual), take these steps to install a line driver card in the RackNest: 1. Insert the card into an empty slot on the RackNest (see Figure 4-3). Do not use excessive force. If the card does not go in easily, remove the card, realign it wi[...]

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 of the local RackNest and the corresponding RCV terminals on the remote RackNest ; attach the other pair of wires to the RCV terminals on the local RackNes[...]

29 CHAPTER 4: Installation T able 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 B1 4 Received Data (RD) 104 A 3 B1 6 Request to Send (RTS) 1[...]

30 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 4-3. Pinout of the RackNest 2/14’s DB25 connector when ME445C-35 is installed. SIGNAL ITU-TSS LEAD DB25 M/34 NAME (ABBREV.) CIRCUIT TYPE (RACK- (NORM. NEST) V.35) PIN PIN Frame (Protective) Ground (FGND) 101 1 A Signal Ground (SGND) 102 7 B Send Data (SD) 103 A 9 P B1 1 S Receive Data (RD) 1[...]

31 CHAPTER 4: Installation T able 4-4. Pinout of the V .35 standalone’s M/34 connector . SIGNAL ITU-TSS LEAD V.35 NAME (ABBREV.) CIRCUIT TYPE PIN Frame (Protective) Ground (FGND) 101 A Signal Ground (SGND) 102 B Send Data (SD) 103 A P BS Receive Data (RD) 104 A R BT Request to Send (RTS) 105 C Clear to Send (CTS) 106 D Data Set Ready (DSR) 107 E [...]

32 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 4-5. Pinout of the RackNest 2/14’s DB25 connector when ME445C-X21 is installed. SIGNAL ITU-TSS LEAD DB25 DA15 NAME (ABBREV.) CIRCUIT TYPE (RACK- (NORM. NEST) X.21) PIN* PIN Shield (n/a) 101 1 1 Ground (G) 102 7 8 a.k.a. Signal Ground (SGND) Transmit (T) 103 A 2 2 B1 4 9 Receive (R) 104 A 3 4[...]

33 CHAPTER 4: Installation 4.3 Connecting Data Cables After you set the standalone line driver’s internal controls, it’s ready to be cabled for operation. Its electrical connectors are located on its rear panel. These consist of a female V.35 interface connector labeled “DTE,” a 5-screw terminal block, and an IEC 320 AC inlet that contains [...]

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 fuses or short-circuiting the fuse holders. The fuse, and one replacement fuse, are located in the top part of the mains connector on the line driver’s rear panel. The nominal current value of the fuse is 0.125 A for 230-V[...]

35 CHAPTER 4: Installation To connect the line driver to a V.35 DTE or DCE, use an appropriate cable that is pinned correctly (straight-through for DTE, properly crossed for DCE). Run this cable from the other device to the line driver and attach it to the line driver’s interface connector. Your line driver should now be ready for continuous oper[...]

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, as well as a brief description of how to operate the unit. Installation procedures must be completed and checked before you attempt to operate the line driver. 5.1 Controls and Indicators The front panel of [...]

37 Figure 5-2. The front panel of the rackmount car d line driver . T able 5-1. The contr ols. 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 its transmitter. Data Set Ready goes low. B ANA [...]

38 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 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 steady SPACE is being transmitted. It flickers when [...]

39 CHAPTER 6: T roubleshooting 6. T roubleshooting This chapter explains system-test and fault-isolation procedures. The line driver provides local loopback and remote digital loopback in compliance with the V.54 standard. Unless you disable them, the unit’s loopback tests can be activated manually from the unit’s front panel, and the local ana[...]

40 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) Figure 6-1. BERT using loops. Figure 6-2. T wo line drivers doing end-to-end BERT . P A TTERN GENERA TOR P A TTERN TESTER ERROR PAT T DEPRESSED P A TTERN GENERA TOR ERROR DEPRESSED (DISCONNECTS EXTERNAL DTE) P A TTERN TESTER RCV DTE XMT PAT T PRESSED P A TTERN GENERA TOR P A TTERN TESTER ERROR RCV XM[...]

41 6.3 The Modem Self-T est 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, make sure that the RTS signal is not OFF (low)[...]

42 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 2. Verify that the DTE is operating properly and can be used for a test. 3. Perform the test using one of these methods: • Send data from the DTE and check the echoed data stream. • Hook up an external Bit Error Rate Test (BERT) unit in place of the DTE. • Use the line driver’s internal BERT.[...]

43 CHAPTER 6: T roubleshooting 6.5 Remote Digital Loopback Activate the remote digital loopback test by pressing the REM button or by raising the level of the remote loopback signal received by the line driver’s V.35 connector (Pin HH). This test involves creating an outbound loopback at the remote line driver (see Figure 6-5 on the next page). T[...]

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 line driver’s front panel. This test involves creating an outbound loopback at the local line driver (see Figure 6-6 on the next page). It works the same way as[...]

45 CHAPTER 6: T roubleshooting 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 or repair the unit. It contains no user-serviceable parts. Contact Bl[...]

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 returning the LDM-MR256, make sure you include[...]

47 Appendix: Maximum Distances The maximum distance that a pair of line drivers can communicate across will vary depending on the data rate and the thickness (gauge) of the wires. In multipoint applications, it will also vary depending on the number of slaves on the line. Approximate maximum distances for different combinations of these factors are[...]

1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 2004. Black Box Corporation. All rights reserved.[...]