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Patton electronic 2520RC manual

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Table of contents for the manual

  • Page 1

    USER MANUAL MODEL 2500RC Series Models 2500RC, 2510RC and 2520RC: All-Rate CSU/DSU Rack Mount Card SALES OFFICE (301) 975-1000 TECHNICAL SUPPORT (301) 975-1007 http://www .patton.com Part# 07M2500RC--D Doc# 09901 1UD Revised 3/19/97 CERTIFIED An ISO-9001 Certified Company[...]

  • Page 2

    T ABLE OF CONTENTS Section Page 1.0 W arranty Information .............................................................2 1.1 Radio and TV Interference 1.2 FCC Information 1.3 CE Information 1.4 Service Information 2.0 General Information ...............................................................5 2.1 Product Features 2.2 General Product Descri[...]

  • Page 3

    1.4 SERVICE All warranty and nonwarranty repairs must be returned freight prepaid and insured to Patton Electronics. All returns must have a Return Materials Authorization number on the outside of the shipping container . This number may be obtained from Patton Electronics T echnical Support: (301) 975-1007 ; http://www .patton.com ; or , support@p[...]

  • Page 4

    2.3 SUPPORTED APPLICA TIONS The Model 2500RC Series includes three units: the Model 2500RC All-Rate CSU/DSU, the Model 2510RC Switched 56 CSU/DSU and the Model 2520RC All-Rate/Switched 56 CSU/DSU. Depending upon the unit selected, the Mode 2500RC Series supports three distinct modes of operation. These are outlined in the descriptions and table bel[...]

  • Page 5

    3.1.1 Switch Set “S1” The configuration switches on switch set S1 allow you to specify Line Rate, Circuit Assurance, RTS, Character Length, Data Format and DSR Loop Status. The table below summarizes S1 switch settings, including the factory defaults. Following the table are descriptions of each switch setting. Switches S1-1. S1-2 and S1-3: Lin[...]

  • Page 6

    Switch S1-4: Circuit Assurance The transmitter and the CTS output can be configured to go On only when a working communication circuit is established. If Circuit Assurance is used, enable it on only one end of the communication link. Circuit Assurance should be enabled in Switched 56 mode. Circuit S1-4 Assurance Description On Enabled CTS will go l[...]

  • Page 7

    Switches S2-1, S2-2 and S2-3: Rate Adapter/DTE Rate The Model 2500RC Series includes a rate adapter that allows the unit to be used with DTE devices that support rates lower than 56/64 kbps. All switch settings below are valid for line rates of 56 or 64 kbps. S2-1 S2-2 S2-3 DTE Rate On On On 2.4 kbps Off On On 4.8 kbps On Off On 9.6 kbps Off Off On[...]

  • Page 8

    3.1.4 Setting Rotary Address Switches If you plan to use the software control port to configure or dial the Model 2500RC Series unit, you will need to configure each front card with a unique address. This is done by using a small screw driver to set the two rotary switches, as shown in Figure 4, below . The switches are set individually for a numbe[...]

  • Page 9

    3.2.3 V erifying Software Switch Control In order to use software switches for configuration, it is necessary to disable the hardware switch settings. T o do this, use the following procedure ( Note: If this procedure is omitted, your software configurations will be overridden by the hardware switch settings): 1. On the Main Menu (opposite page), c[...]

  • Page 10

    DTE Data Format Choosing option 5 in the Software Switch Menu takes you to the Data Format Menu (below). This option controls whether an async-to- sync conversion is performed between the DTE and the Model 2500RC Series. (Data is always transferred synchronously between two Model 2500RC Series units.) For an asynchronous DTE, select the asynchronou[...]

  • Page 11

    DSR Status During Local Loopback Choosing option 6 in the Software Switch Menu takes you to the DSR Loop Status Menu (below). This option controls the behavior of the DSR output during local loopback. T o force DSR high (ON) during local loopback, enable this option. T o force DSR low (OFF) during a local loopback, disable it. Rate Converter/DTE Ra[...]

  • Page 12

    21 22 Set this option as follows: • Internal (Master): T o use the Model 2500RC and 2520RC internal reference clock as the timing source, select item 1. Use internal timing in point-to-point applications where the Model 2500RC Series is being used as a limited distance modem. (Set the far-end Model 2500RC Series unit for looped timing as describe[...]

  • Page 13

    3.3 REAR CARD CONFIGURA TION The Model 2500RC Series has two interface card options: the Model 1000RCM12548 (DB-25/RJ-48S) and the Model 1000RCM13448 (M/34/RJ-48S). Each of these options supports one interface connection and one 4-wire connection. Figure 5 (below) illustrates the two different interface options for the Model 2500RC Series. Prior to[...]

  • Page 14

    25 26 SGND & FRGND (JB4) In the connected position, this strap links DB-25 pin 7 (Signal Ground) and frame ground. In the open position, pin 1 is “lifted” from frame ground. JB4 Position 1&2 = SGND (Pin 7) and FRGND Connected Position 2&3 = SGND (Pin 7) and FRGND Not Connected 3.3 . 2 Model 1000RCM13448 Strap Settings Figure 8 shows[...]

  • Page 15

    27 28 Switching the Power Supply On and Off The power switch is located on the front panel. When plugged in and switched on, a red front panel LED will glow . Since the Model 1000R16 is a "hot swappable" rack, it is not necessary for any cards to be installed before switching on the power supply . The power supply may be switched off at a[...]

  • Page 16

    29 30 • “CTS” will glow green to indicate an On condition. When on, the unit is ready to send data. If CTS remains off, check the Forced RTS, Circuit Assurance and Anti-Stream settings. • “CD” will glow green to indicate that a valid carrier is present. If CD is not lit, there is no valid carrier signal detected. • “DTR” will glow[...]

  • Page 17

    31 32 5.2.2 Displaying Line/Loop Status T o check the current status of the Model 2500RC Series and the associated circuit, go to the Main Menu and select item 4, “Display Line/Loop Status” 1,2 . This will take you to a screen similar to the Line/Loop Status Monitor Screen (below). NOTE 1 : T o refresh the display with the most up-to-date infor[...]

  • Page 18

    33 34 5.3.2 Remote Digital Loopback (RDL) The Remote Digital Loopback (RDL) test checks the performance of both the local and remote Model 2500RC Series', and the communication link between them. Any characters sent to the remote Model 2500RC Series in this test mode will be returned back to the originating device. For example, characters type[...]

  • Page 19

    35 36 5.4 THE V .52 BER TEST P A TTERN GENERA TOR The Model 2500RC Series has a built-in test pattern generator and detector . It can be invoked at both ends of a link simultaneously (using two operators) or it can be invoked in conjunction with the LAL or RDL tests (using one operator). The following example requires two operators–one to initiat[...]

  • Page 20

    Read Stored Number Selecting item 2 in the Dial Menu lets you view the phone number currently stored in the Model 2500RC Series non-volatile memory . Dial New Number Selecting item 3 in the Dial Menu lets you dial a number other than the one stored in non-volatile memory . When you select this menu item, the Model 2500RC Series responds with this p[...]

  • Page 21

    39 APPENDIX B CABLE RECOMMENDA TIONS The Patton Model 2500RC Series operates at frequencies of 20kHz or less and has been performance tested by Patton technicians using twisted-pair cable with the following characteristics: Wire Gauge Capacitance Resistance 19 A WG 83nf/mi or 15.72 pf/ft. .0163 Ohms/ft. 22 A WG 83nf/mi or 15.72 pf/ft. .0326 Ohms/ft[...]

  • Page 22

    41 APPENDIX D INTERF ACE PIN ASSIGNMENT DDS INTERF ACE The DDS Interface is an RJ-48S modular jack. Pin # Signal 1 TX+ 2 TX- 3 no connection 4 no connection 5 no connection 6 no connection 7 RX+ 8 RX- M/34 CONNECTOR, TERMINAL INTERF ACE Pin # Signal B SGND (Signal Ground) CR T S D CTS E DSR FC D H DTR L LL (Local Loop) M TM (T est Mode) N RL (Remot[...]

  • Page 23

    Dear V alued Customer , Thank you for purchasing Patton Electronics products! W e do appreciate your business. I trust that you f ind this user manual helpful. W e manufacture one of the widest selections of data communications products in the world including CSU/DSU's, network termination units, powered and self-po wered short range modems, f[...]