Instruction/ maintenance manual of the product MT257A Black Box
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MAY 2001 MT255A-M MT256A-F MT257A G.703 Adapters and Balun Mate II CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S.: Call 877-877-BBOX (outside U.
1 FCC/IC RFI STATEMENTS 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, might cause interference to radio communication.
2 G.703 ADAPTERS AND BALUN MATE II EUROPEAN UNION DECLARATION OF CONFORMITY The manufacturer declares that this equipment complies with the requirements of the EMC Directive 89/336/EEC, as well as the Low Voltage Directive (LVD).
3 NOM STATEMENT 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.
4 G.703 ADAPTERS AND BALUN MATE II 10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de calor, estufas u otros aparatos (incluyendo amplificadores) que producen calor .
5 TABLE OF CONTENTS Contents Chapter Page 1. Specifications .............................................................. 6 2. Introduction ............................................................... 8 3. Configuration ...........................
6 G.703 ADAPTERS AND BALUN MATE II 1. Specifications Compliance: CE, FCC Part 15 Subpart J Class A, IC Class/ classe A Interfaces: ITU CTR-12 G.703 (unstructured): Coaxial: Unbalanced 75-ohm (RG-59 or 2002 cable); Twisted-pair: Balanced 120-ohm (shielded or unshielded cable) Data Rate: Up to 2.
7 CHAPTER 1: Specifications Isolation: 500 volts AC/DC between coax and twisted-pair sides Temperature Tolerance: 32 to 122˚F (0 to 50˚C) Humidity Tolerance: 5 to 95% noncondensing Power: From interfaces Size: MT255A-M (excluding cable pigtails), MT256A-F: 2.
8 G.703 ADAPTERS AND BALUN MATE II 2. Intr oduction The G.703 Adapters and the Balun Mate II enable 75-ohm coaxial G.703 equipment/networks to communicate with 120-ohm twisted-pair G.
9 CHAPTER 2: Introduction The Balun Mate II (MT257A) is designed to be mounted in a 19" rack. It contains sixteen individual port-card modules, each of which has a pair of female coaxial connectors for existing cables. The coaxial connectors on all of these models are the 1.
10 G.703 ADAPTERS AND BALUN MATE II • Interface-powered—no AC or battery power required. • Adapters are housed in low-profile, flame- retardant enclosures with either male or female coaxial connectors. • Balun Mate II can be mounted in 2U of vertical space in a 19" rack and can patch as many as sixteen terminations.
11 CHAPTER 2: Introduction Figure 2-1. Using a single Adapter to connect a coaxial G.703 device to a twisted-pair G.703 device. Figure 2-2. Using a pair of Adapters to run a G.703 link through twisted-pair site wiring. Adapter Adapter Adapter Telco Distribution Frame (PBX, Mux, etc.
12 G.703 ADAPTERS AND BALUN MATE II 3. Configuration The G.703 Adapters and the Balun Mate II have only one user-settable configuration option. They express Transmit Data (TX) shield to the twisted-pair cabling on RJ-45 Pin 3 and Receive Data (RX) Shield on RJ-45 Pin 6.
13 CHAPTER 3: Configuration installed settings, JP1 links RJ-45 Pin 3 to the coax TX shield, while JP2 links RJ-45 Pin 6 to the coax RX shield. To remove these jumpers in order to break these links, you’ll need to open the case of your Adapter or temporarily remove each port-card module from your Balun Mate II.
14 G.703 ADAPTERS AND BALUN MATE II 3. Looking down at the top of the circuit board with the RJ-45 jack facing to the left, you should be able to see both jumpers in the middle of the board: JP1 toward the back and JP2 toward the front.
15 CHAPTER 4: Installation and Operation 4. Installation and Operation To connect a G.703 Adapter or Balun Mate II to your G.703 devices and/or networks, take these steps: 1. If you are using an MT255A-M Adapter, connect its coaxial pigtails to your device’s coaxial G.
16 G.703 ADAPTERS AND BALUN MATE II As soon as you connect the Adapter or Balun Mate II to a working G.703 device/network on both the coaxial and twisted-pair sides, it will begin operating immediately, drawing power from the interfaces and translating between them.
17 CHAPTER 5: Troubleshooting 5. T r oubleshooting 5.1 Calling Black Box If your G.703 Adapter or Balun Mate II seems to be malfunctioning, do not attempt to alter or repair it . It contains no user-serviceable parts. Call Black Box Technical Support at 724-746-5500; the problem might be solvable over the phone.
18 G.703 ADAPTERS AND BALUN MATE II 5.2 Shipping and Packaging If you need to transport or ship your G.703 Adapter or Balun Mate II: • Package it carefully. We recommend that you use the original container. • If the shipping is return- or repair-related, include everything you received with the Adapter or Balun Mate II when you pack it.
19 APPENDIX: Block Diagram Appendix: Bloc k Diagram Although the arrows in this diagram showing data flow are bidirectional, and the Adapters and Balun Mate II do support bidirectional data transfer, .
NOTES.
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 2001. Black Box Corporation. All rights reserved..
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