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Patton electronic 2703-X21 manual

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Table of contents for the manual

  • Page 1

    USER MANUAL MODEL 2703-X21 G.703/E1 Digital Modem SALES OFFICE (301) 975-1000 TECHNICAL SUPPORT (301) 975-1007 http://www .patton.com Part# 07M2703-X21-C Doc# 031 1 1 1UC Revised 6/19/98 CERTIFIED An ISO-9001 Certified Company[...]

  • Page 2

    1.0 W ARRANTY INFORMA TION Patton Electronics warrants all Model 2703-X21 components to be free from defects, and will—at our option—repair or replace the product should it fail within one year from the first date of shipment. This warranty is limited to defects in workmanship or materials, and does not cover customer damage, abuse or unauthori[...]

  • Page 3

    Switch Set S1 The configuration switches on S1 set clocking, rate adaptation, loopback enable, and data invert. The default settings are summarized in the table below . S1-1: Master/Slave Clock The setting for switch S1-1 determines whether the Model 2703- X21 provides the master clock, or is slaved to another clock source. S1-1 Setting On Model 27[...]

  • Page 4

    S1-2 and S1-3: Rate Adaptation Switches S1-2 and S1-3 are set in combination to allow the Model 2703-X21 to adapt to terminal devices running at data rates of less than 2.048 Mbps (The network rate remains 2.048 Mbps regardless of the terminal rate adaptation setting). The setting you select should match the data rate of your terminal device. S1-2 [...]

  • Page 5

    LK1: 75 Ohm T ransmit Shield-to-Ground Connection This setting determines whether the shield of the 75 Ohm (coax) transmit cable is connected to earth ground. This connection must be made when operating in 75 Ohm (unbalanced) mode. Conversely , this connection must not be made when operating in 120 Ohm (balanced) mode. LK1 Setting Strap On 75 Ohm T[...]

  • Page 6

    LK5: Configuration Auto-Sense This setting determines whether the host can automatically sense the configuration of the Applique. The operation of the Applique is not affected by this jumper setting. Auto-sense should be enabled when operating in 75 Ohm (unbalanced) mode. Current interface standards do not list this feature for 120 Ohm (balanced) m[...]

  • Page 7

    4.0 INST ALLA TION Once the Model 2703-X21 is properly configured, it is ready to connect to your system. This section tells you how to properly connect the Model 2703-X21 to the G.703 network and terminal device interfaces. 4.1 CONNECTION TO THE G.703 NETWORK The Model 2703-X21 supports 2.048 Mbps communication over an unstructured G.703 network. [...]

  • Page 8

    5.0 OPERA TION Once the Model 2703-X21 is properly configured and installed, it should operate transparently . This sections describes power-up, reading the LED status monitors, and using the built-in loopback test modes. 5.1 POWER-UP T o apply power to the Model 2703-X21, first be sure that you have read Section 3.3, and that the unit has the prop[...]

  • Page 9

    APPENDIX B MODEL 2703-X21 PIN CONFIGURA TIONS APPENDIX A P A TTON MODEL 2703 SPECIFICA TIONS Network Interface: G.703 Network Rate: 2.048 Mbps Network Connectors: T wo BNC (75 Ohm) and one modular RJ-45 connector (120 Ohm) T erminal Interface: X.21 on female DB-15 connector T erminal Rate: 2.048 Mbps, 1.024 Mbps, 512 kbps or 256 kbps Diagnostics: L[...]

  • Page 10

    APPENDIX C F ACTOR Y P ARTS AND ACCESSORIES C-1 Basic Standalone Units The Patton Model 2703-X21 standalone digital modem is available in three versions, depending upon the power supply installed. The Standard and Universal Interface versions are supplied with a power cord, which must be specified in the model number when ordering . The DC version [...]