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Patton electronic X.21 Interfaces manual

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Table of contents for the manual

  • Page 1

    USER MANUAL MODEL 2707C, D G.703 NTU with V .35, X.21 Interfaces SALES OFFICE (301) 975-1000 TECHNICAL SUPPOR T (301) 975-1007 P ar t# 07M2707-UM Doc# 08619U2-001, Rev . B Revised 10/27/06 An ISO-9001 Certified Company[...]

  • Page 2

    1 T ABLE OF CONTENTS 1.0 Warranty Information ................................................................. 2 1.1 FCC Information ........................................................................... 2 1.2 CE Notice...................................................................................... 2 1.3 Service ........................[...]

  • Page 3

    2 1.0 W ARRANTY INFORMATION P atton Electronics warrants all Model 2707 components to be free from def ects, and will—at our option—repair or replace the product should it f ail within one year from the first date of shipment. This warranty is limited to def ects in w orkmanship or mater ials, and does not cov er customer damage, ab use , or u[...]

  • Page 4

    3 1.3 SERVICE All warranty and nonw arranty repairs must be returned freight prepaid and insured to P atton Electronics. All returns must hav e a Return Mate- rials Authorization number on the outside of the shipping container . This number ma y be obtained from Patton Electronics T echnical Ser vices at: T el: (301) 975-1007 E-mail: support@patton[...]

  • Page 5

    4 2.0 GENERAL INFORMATION Thank you f or your purchase of this P atton Electronics product. This product has been thoroughly inspected and tested and is warranted f or One Y ear parts and labor . If any questions or problems arise during installation or use of this product, please do not hesitate to contact P at- ton Electronics T echnical Suppor t[...]

  • Page 6

    5 3.0 CONFIGURATION The Model 2707 f eatures configuration capability via hardware DIP s witches. This section descr ibes all possible DIP s witch configurations of the Model 2707. 3.1 DIP SWITCH CONFIGURATION The Model 2707 has one internal DIP switch that allow configur ation f or a wide range of applications. The switch is accessed from the u[...]

  • Page 7

    6 Figure 2. Close up of configuration s witches Switch SW1-1 thr ough SW1-8 Switch SW1-1 Line Coding: HDB3 (default) Use Switch SW1-1 to control the Network Line Coding options. Set these options to be the same as the Line Coding given to y ou by your Ser vice Provider . If you are using two Model 2707s together as shor t range modems, set both un[...]

  • Page 8

    7 Options: HDB3, AMI HDB3: In this line coding, the transmitter substitutes a deliberate bipolar violation when e xcessive z eros in the data stream are detected. The receiver recogniz es these special violations and decodes them as z eros . This method enables the netw ork to meet minimum pulse density requirements. Unless AMI is required in your [...]

  • Page 9

    8 SW1-6 and SW1-7 Clock Modes Use Switches SW1-6 and SW1-7 to configure the 2707 f or internal, e xternal, or receive recov er clock mode. SW1-8: Enable/Disable Loop T ests from DTE Use Switch SW1-8 to allow Model 2707 to enter loopbac k tests when the DTE raises the appropriate loop request pin. T able 3: SW1-6 and SW1-7 Clock Modes SW1-6 SW1-7 C[...]

  • Page 10

    9 4.0 INSTALLATION Once the Model 2707 is properly configured, it is ready to connect to the G.703 interf ace , to the serial por t, and to the power source . This section describes how to make these connections . 4.1 CONNECTING T O THE G.703 NETWORK The P ower , G.703 and ser ial Line connections are located on the rear panel of the Model 2707. T[...]

  • Page 11

    10 Connecting the T wisted Pair (120 Ohm) to the G.703 Netw ork The Model 2707 is equipped with a single RJ-48C jack f or connections to a 120 Ohm twisted pair G.703 network interface . If your G.703 network terminates via RJ-48C, use Figure 4 below to connect the 120 Ohm G.703 network channel. Figure 4. G.703 120 Ohm Connection 4.2 CONNECTING THE [...]

  • Page 12

    11 The DCE/DTE strap is located near the DB15 connector on the top side of the board. The arro ws on the top of the strap indicate the configura- tion of the X.21 por t (for e xample, if the DCE arrows are pointing to ward the DB-15 connector , the X.21 por t is wired as a DCE). Rev erse the DCE/DTE orientation by pulling the strap out of its soc [...]

  • Page 13

    12 DC P ower The 36-60 VDC DC to DC adapter is supplied with the DC version of the Model 2707. The b lack and red leads plug into a DC source (nominal 48VDC) and the barrel power connector plugs into the barrel po wer sup- ply jack on the 2707. (See Figure 5). Figure 5. Connecting DC P ower to the 2707 DC P ower Supply W ARNING There are no user-se[...]

  • Page 14

    13 5.0 OPERATION When the Model 2707 has been properly configured and installed, it should operate transparently . This sections describes pow er-up, LED status monitors, and the b uilt-in loopback test modes. 5.1 POWER-UP Bef ore applying power to the Model 2707, please read section 4.3, “P ower Connection” on page 11 and ensure that the unit[...]

  • Page 15

    14 5.3 LOCAL LOOP DIAGNOSTICS The Model 2707 off ers V .54 loop diagnostics. Use these diagnostics to test the NTU and any communication links . This test can be activated via DIP s witches or via signals on the Model 2707 serial por t interface. Operating Local Loopback (LL) The Local Loopback (LL) test chec ks the operation of the local Model 270[...]

  • Page 16

    15 APPENDIX A MODEL 2707, G.703 SPECIFICATIONS Network Data Rate: 2.048 Mbps Network Connector : RJ-48C/Dual Coax BNC (2707/D) Nominal Impedance: 75/120 Ohm Line Coding: Selectable AMI or HDB3 Line F raming: G.703 (Unframed) Clocking: Internal or Network (Receive Recov er) Distance: Maximum 1.8 km (6,000 ft.) on 24 A WG Cable Configuration: One 8-[...]

  • Page 17

    16 APPENDIX B MODEL 2707, INTERFACE PIN ASSIGNMENT V .35 Interf ace (M/34F F emale Connector) (DCE Configuration) Pin # Signal B SGND (Signal Ground) C R TS (Request to Send) D CTS (Clear to Send) E DSR (Data Set Ready) F CD (Carr ier Detect) H DTR (Data T erminal Ready) L LLB (Local Line Loop) M TM (T est Mode) N RDL (Remote Digital Loop) P TD (T[...]

  • Page 18

    17 APPENDIX B - Continued V .35 T O V .35 (STRAIGHT - THROUGH CABLE) PIN OUT V .35 T O V .35 (CROSS O VER CABLE) PIN OUT PIN Function PIN Function PIN A F rame Ground A F rame Ground A B Signal Ground B Signal Ground B C RTS C DCD F D NC D NC D E DSR E DTR H F DCD F RTS C H DTR H DSR E K NC K NC K L NC L NC L P TD (A) P RD (A) R R RD (A) R TD (A) P[...]

  • Page 19

    18 APPENDIX C MODEL 2707, INTERFACE PIN ASSIGNMENT X.21 Interf ace (DB-15 F emale Connector) (DTE/DCE Configuration) Pin # Signal 1 F rame Ground 2 T (T ransmit Data-A) 3 C (Control-A) 4 R (Receive Data-A) 5 I (Indication-A) 6 S (Signal Element Timing-A) 7 BT (Byte Timing-A) 8 SGND (Signal Ground) 9 T/ (T ransmit Data-B) 10 C/ (Control-B) 11 R/ (R[...]

  • Page 20

    19 APPENDIX D MODEL 2707, FACTORY REPLACEMENT PARTS AND ACCESSORIES Cop yright © 2006 P atton Electronics Company All Rights Reser ved. Model # Description 2707/C G.703 NTU with a V .35 interface 2707/D G.703 NTU with an X.21 interface 2707/I G.703 NTU w/ 10Base-T EN interface 0805US American P ower Cord 0805EUR European P ower Cord CEE 7 0805UK U[...]