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Patton electronic 2703 manual

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Table of contents for the manual

  • Page 1

    USER MANU AL MODEL 2703 G.703/E1 Digital Modem SALES OFFICE (301) 975-1000 TECHNICAL SUPPORT (301) 975-1007 http://www .patton.com Part# 07M2703-I Doc# 031041UI Revised 08/16/99 An ISO-9001 Certified Company[...]

  • Page 2

    1.0 WARRANTY INFORMA TION Patton Electronics warrants all Model 2703 components to be free from defects, and will—at our option—repair or replace the prod- uct 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 unauthorize[...]

  • Page 3

    2.0 GENERAL INFORMA TION Thank you for your purchase of this Patton Electronics product. This product has been thoroughly inspected and tested and is warrant- ed for One Y ear parts and labor . If any questions or problems arise during installation or use of this product, please do not hesitate to con- tact Patton Electronics T echnical Support at [...]

  • Page 4

    3.1.1 Switch Set S1 The configuration switches on S1 set clocking, rate adaptation, loopback enable, data invert, and interface (see also Switch S2). The default settings are summarized in table below . Switch S1-1: T erminal Interface (W orks in Conjunction with Switch S2) Set Switch S1-1 (as well as S2-1 and S2-2)to determine whether the signals [...]

  • Page 5

    Switch S1-8: Loopback T est Enable Depending upon the setting of switch S1-8 the Model 2703 will either be continually in loopback mode, or loopback mode will be enabled by pressing and holding the front panel switch. Since the front panel switch is spring loaded–it returns to “Normal” operation when pressure is released–this DIP switch pro[...]

  • Page 6

    The internal jumpers mounted on the Model 2703’s PC board (labeled LK1 - LK7) are used to configure the 75 ohm or 120 ohm net- work link parameters. Figure 4 (above) shows the location of the Model 2703’s jumpers on the internal PC board. The table below shows the factory default jumper settings. Following the table are descriptions for each ju[...]

  • Page 7

    Jumper LK6 & LK7: 75 Ohm T ermination Impedance This jumper sets the termination impedance correctly for 75 Ohm operation. Both jumpers must be in place when operating in 75 Ohm (unbalanced) mode. Conversely , both jumpers must be removed when operating in 120 Ohm (balanced) mode. LK6 LK7 Setting On On 75 ohm operation Off Off 120 ohm operation[...]

  • Page 8

    4.2 CONNECTION TO THE TERMINAL DEVICE The Model 2703 is wired as a DCE, and–when configured proper- ly–supports communication with a wide variety of terminal (DTE) devices. Compatible interface standards include EIA-530 (RS-422), CCITT X.21 and CCITT V .35. All interfaces are supported on a female UD-26 connector (a sub- miniature 26-pin “D?[...]

  • Page 9

    5.3 LOOPBACK TEST (LAL) The Model 2703 is equipped with a Local Analog Loopback (LAL) mode to assist in evaluating the operation of the local Model 2703. Any data sent to the local Model 2703 in this test mode will be echoed (returned) back to the user device. For example, characters typed on the keyboard of a terminal will appear on the terminal s[...]

  • Page 10

    APPENDIX B P A TTON MODEL 2703 PIN CONFIGURA TIONS 17 13- (CTS/) Clear to Send 12- (TC/) Transmit Clock 1 1- Not Used 10- (CD/) Carrier Detect 9- (RC/) Receive Clock 8- (CD) Carrier Detect 7- (SG) Signal Ground 6- (DSR) Data Set Ready 5- (CTS) Clear to Send 4- (RTS) Request to Send 3- (RD) Receive Data 2- (TD) Transmit Data 1- Shield UNIVERSAL D-26[...]

  • Page 11

    19 APPENDIX C (contd) P A TTON MODEL 2703 F ACTOR Y P ARTS AND ACCESSORIES C-3 T erminal (DTE) Interface Cables No terminal (DTE) cable is supplied with the Model 2703. Y ou may construct your own cable using the pin-out diagrams in Appendix B, or purchase one of the Patton’s standard adapter cables listed below . Custom lengths are available.[...]