Patton electronic 2450 User's Manual
Contents
1. BEBBEGHH S1 Figure 1 Underside of Model 2450 showing location of DIP switches 3 2 CONFIGURATION SWITCH SET S1 The switches shown in Figure 2 below and on DIP switch S1 control clock mode circuit assurance RTS data rate and test loop functions Following Figure 2 are factory default settings and detailed switch descriptions for each switch ON kuukdiaa 1 2 3 4 5 6 7 8 OFF Figure 2 Close up of DIP switches showing ON and OFF positions S1 SUMMARY TABLE Position Function Factory Default S1 1 Clock Mode Off Nisia 1 2 Clock Mode On 1 3 Circuit Assurance Off Disabled 1 4 RTS On Forced On 1 5 Line Rate Off 56 kbps 1 6 Front Panel Switches Off Enabled 1 7 DTE Loop Control On Disabled 1 8 Receive RDL Off Enabled Switches S1 1 and S1 2 Clock Mode The setting for switches S1 1 and S1 2 determines the transmitter clocking mode for the Model 2450 S1 1 S1 2 Clock Mode On Off External DTE Off On Network Looped Off Off Internal Master On On Campus Clock Description Transmit clock derived from terminal interface Transmit clock derived from the received line signal Use this mode for Dedicated DDS operation Transmit clock derived internally Transmit clock derived from received2. has either DB 25 or M 34 connector Ultra compact enclosure fits in tight spaces 2 2 DESCRIPTION The Model 2450 DDS amp Clear Channel CSU DSU is a standalone AC powered CSU DSU designed for 4 wire full duplex communications over dedicated twisted pair Synchronous data rates of 56 and 64 Kbps are supported at distances up to 3 4 miles The Model 2450 provides selectable timing options of internal external or network receive recovered clock A circuit assurance feature is also provided For user convenience the Model 2450 s DIP switches are externally accessible so there is no need to open the case to configure the unit The Model 2450 s built in V 54 loopback test modes and V 52 BER test patterns are accessed using two front panel switches Six front panel LEDs monitor test modes and communication status Line connections are facilitated by a modular RJ 48S jack on the rear of the unit 3 0 CONFIGURATION The Model 2450 is easy to install and is ruggedly designed for excellent reliability just set it and forget it The following instructions will help you set up and install the Model 2450 properly 3 1 CONFIGURATION SWITCHES The Model 2450 uses a mini DIP switch package that allows configuration to a wide range of applications This DIP switch is externally accessible from the underside of the Model 2450 see Figure 1 below therefore you do not need to open the Model 2450 s case during configuration E REAR
3. monitor the tests at the local Model 2450 and one to do the same at the remote Model 2450 In this case the test pattern sent by each Model 2450 will not be looped back but will be transmitted down the line to the other Model 2450 Both operators must initiate and monitor the tests simultaneously 12 APPENDIX A PATTON MODEL 2450 SPECIFICATIONS DDS Type Transmission Format Maximum Operating Distance DTE Interface DDS Line Interface Standards DDS Line Rates DTE Rates Transmission Line Applications Indicators Diagnostics Power Supply Dimensions Dedicated Synchronous full duplex 18000 feet 3 4 miles over 26 AWG twisted pair RS 232 DB 25 female RS 422 530 DB 25 female V 35 M 34 female or DB 25 female RJ 48S jack AT amp T 62310 compliant 56 and 64 Kbps 56 and 64 Kbps 4 wire DDS point to point or multipoint Clear Channel point to point campus area point to point LED indicators for TD RD CD No Signal Error and Test Mode V 54 compliant local and remote loopback tests V 52 compliant 511 511E BER test 120 VAC 60 Hz or 230 VAC 50 Hz to 10 VAC 1A wall mount transformer RS 232 version 1 65 H x 4 18 W x 3 55 D V 35 version w screws 1 65 H x 4 18 W x 3 96 D 13 APPENDIX B CABLE RECOMMENDATIONS The following statements apply to the Model 2450 when used as a short range modem over private twisted pair All Patton Electronics Company Short R
4. s instructions may cause interference to radio and television reception The Model 2450 has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection from such interference in a commercial installation However there is no guarantee that interference will not occur in a particular installation If the Model 2450 does cause interference to radio or television reception which can be determined by disconnecting the RS 232 interface the user is encouraged to try to correct the interference by one or more of the following measures moving the computing equipment away from the receiver re orienting the receiving antenna and or plugging the receiving equipment into a different AC outlet such that the computing equipment and receiver are on different branches In the event the user detects intermittent or continuous product malfunction due to nearby high power transmitting radio frequency equipment the user is strongly advised to use data cables with an exterior outer shield bonded to a metal or metalized connector 1 2 FCC INFORMATION The Model 2400 Series has been tested and registered in compliance with the specifications in Part 68 of the FCC rules A label on the equipment bears the FCC registration number You may be requested to provide this information to your telephone company Your telephon
5. 25 CONNECTOR RS 232 V 24 TERMINAL INTERFACE Signal Frame Ground TD RD RTS CTS DSR SGND Signal Ground CD TC RC LL Local Loop RL Remote Loop XTC TM Test Mode MODEL 2450 B DB 25 CONNECTOR RS 422 530 TERMINAL INTERFACE vu 5 in OONDOOARWD Signal Frame Ground Transmit Data A Receive Data A RTS CTS DSR SGND Signal Ground CD Receive Clock B External Clock B Transmit Clock B Transmit Data B Transmit Clock A Recieve Data B Receive Clock A LL Local Loop RL Remote Loop External Clock A TM Test Mode 17 APPENDIX D Continued MODEL 2450 E DB 25 CONNECTOR V 35 TERMINAL INTERFACE vu 5 OONDOOARWD Signal Frame Ground Transmit Data A Receive Data A RTS CTS DSR SGND Signal Ground CD Receive Clock B External Clock B Transmit Clock B Transmit Data B Transmit Clock A Recieve Data B Receive Clock A LL Local Loop RL Remote Loop External Clock A TM Test Mode Copyright Patton Electronics Company All Rights Reserved 18 Dear Valued Customer Thank you for purchasing Patton Electronics products We do appreciate your business I trust that you find this user manual helpful We manufacture one of the widest selections of data communications products in the world including CSU DSU s network termination units powered and self powered short range modems fiber optic modems interface converters baluns electr
6. EE 56 64 kbps CSU DSU RS 232 DB 25 female connector 2450 Besincch eon eesti 56 64 kbps CSU DSU RS 422 530 DB 25 female connector 245 0 C te e petan 56 64 kbps CSU DSU V 35 M 34 female connector 245E earn 56 64 kbps CSU DSU V 35 DB 25 female connector 10 2500 0 eeeeceeeeeteeeeees DDS Cable RJ48S RJ48S 6 foot 080510 ACB oasian 120V Wall Mount AC Adapter 080512 ACIB ee 230V AC adapter No Power Cord O805US AE American Power Cord O805EUR eeeeeeeeeees European Power Cord CEE 7 O805EURP eee Europlug Power Cord CEE 7 16 O8B05UK ee eeeeeeeneeees United Kingdom Power Cord O805AUS cesceeeeeeees Australia New Zealand Power Cord O805DEN e Denmark Power Cord O805FR ee eeeeeeeeeeneeees France Belgium Power Cord 01510 eee India Power Cord 0805 bs ee Israel Power Cord 0805JAP eeren Japan Power Cord O805SW ccecceeeeeeees Switzerland Power Cord APPENDIX D INTERFACE PIN ASSIGNMENT DDS CLEAR CHANNEL INTERFACE The DDS Clear Channel Interface is an RJ 48S modular jack Pin Signal TX TX no connection no connection no connection no connection RX RX ONOaRWND MODEL 2450 C M 34 CONNECTOR V 35 TERMINAL INTERFACE 5 Signal Frame Ground SGND Signal Ground LL Local Loop TM Test Mode RL Remote Loop lt x E lt cCHwVvZeErmmMv0OW gt J o 16 APPENDIX D Continued MODEL 2450 A DB
7. USER MANUAL MODEL 2450 56 64 Kbps 4 Wire DDS amp Clear Channel CSU DSU pE PATTON Ek ElecironicsTo TSO Part 07M2450 B SALES OFFICE Doc 099051UB J Revised 3 12 97 301 975 1000 AA TECHNICAL SUPPORT 301 975 1007 An ISO 9001 http www patton com Certified Company 1 0 WARRANTY INFORMATION Patton Electronics warrants all Model 2450 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 unauthorized modification If this product fails or does not perform as warranted your sole recourse shall be repair or replacement as described above Under no condition shall Patton Electronics be liable for any damages incurred by the use of this product These damages include but are not limited to the following lost profits lost savings and incidental or consequential damages arising from the use of or inability to use this product Patton Electronics specifically disclaims all other warranties expressed or implied and the installation or use of this product shall be deemed an acceptance of these terms by the user 1 1 RADIO AND TV INTERFERENCE The Model 2450 generates and uses radio frequency energy and if not installed and used properly that is in strict accordance with the manufacturer
8. ange Modems SRMs are tested to the distances published in our Catalogs and Specification Sheets on twisted pair cable with the following characteristics Wire Gauge Capacitance Resistance 19 AWG 83nF mi or 15 72 pF tt 0163Q ft 22 AWG 83nF mi or 15 72 pF ft 03269 ft 24 AWG 83nF mi or 15 72 pF tt 051650 ft 26 AWG 83nF mi or 15 72 pF ft 082350 tt We fully expect that the Short Range Modems will operate on lines with specifications different from those tested but to reduce the potential difficulties in the field one should ensure that the cable being used has similar or better characteristics lower capacitance or lower resistance Wire with capacitance of 20pF ft or less is suitable for all our Short Range Modems However distances may vary from those published in our catalog Variations in wire resistance will also affect distance but not functionality Wire should be 26 AWG or larger smaller AWG Patton products are designed to withstand normal environmental noise and conditions however other environmental factors too numerous to discuss in this format may affect proper operation of the SRM s Selection of the proper SRM for an application is critical to maintaining Customer Satisfaction and should be taken seriously Certain models are better suited for particular applications and environments than others 14 APPENDIX C FACTORY REPLACEMENT PARTS AND ACCESSORIES Patton Model Description 245 0 A OEE E
9. bps mode CD glows red if there is no carrier or if a bipolar violation occurs In 56 Kbps mode CD glows red if there is no carrier if an Out of Service or Out of Frame violation occurs or if idle code is detected e NS No Signal glows red when there is no valid carrier This means the Model 2450 receiver has not detected a valid signal from the digital service provider or in the case of short haul operation from the remote Model 2540 If NS is lit check for an unplugged cable broken wire or an incorrect Line Rate selection 10 Error glows red when errors are detected in test mode during the 511 and 511 E tests This indicator also glows during normal operation to indicated framing errors and or bipolar violations in 64 Kops mode or invalid bipolar violations in 56 Kbps mode see Figure 7 below e Test glows red when the V 54 loopback tests or V 52 BER tests are initiated 5 2 TEST MODES The Model 2450 offers two V 54 test modes plus a built in V 52 BER test pattern generator to evaluate the condition of the modems and the communication link These tests can be activated physically from the front panel or via the interface 5 2 1 Using Local Analog Loopback LAL The Local Analog Loopback LAL test checks the operation of the local Model 2450 and is performed separately on each unit Any data sent to the local Model 2450 in this test mode will be echoed returned back to the user
10. d Front panel switches will have no effect on operation of the unit Switch S1 7 DTE Loop Request Line Enable Disable The setting for switch S1 7 determines whether the DTE signals can be used to activate terminate the loopback diagnostic modes and BER test patterns DTE TM Line S1 7 Activation Description Off Enabled DTE Loop request line switches may be used to activate terminate diagnostics On Disabled DTE loop request lines will have no effect on operation of the unit Switch 1 8 Receive RDL Enable Disable Switch S1 8 determines whether or not the unit will respond to loop requests from the remote device S1 6 Activation Description Off Enabled Unit wil respond to loop requests from the remote device On Disabled Unit wil ignore loop requests from the remote device 4 0 INSTALLATION The Model 2450 is designed for 4 wire full duplex communication over a DDS or Clear Channel carrier circuit or over dedicated twisted pair This section will describe proper connection of the line interface the DTE terminal interface and the AC power supply 4 1 LINE NETWORK CONNECTION The RJ 48S port on a Model 2450 CSU DSU is prewired for a standard TELCO wiring environment see Figure 4 below Connect this port to the RJ 48S jack provided by your digital service carrier using a straight through twisted pair cable between 19 and 26 AWG To be sure you have the right wiring use the table below as a guide Figure 4 In
11. device For example characters typed on the keyboard of a terminal will appear on the terminal screen To perform a LAL test follow these steps 1 Activate LAL This may be done in one of two ways First by moving the front panel toggle switch DOWN to Local and second by raising pin 18 on the interface Note Make sure DIP switch S1 7 is OFF Once LAL is activated the Model 2450 transmitter output is connected to its own receiver The Test LED should be lit 2 Verify that the data terminal equipment is operating properly and can be used for a test If a fault is indicated call a technician or replace the unit 3 Perform a V 52 BER bit error rate test as described in Section 5 2 3 If the BER test equipment indicates no faults but the data terminal indicates a fault follow the manufacturer s checkout procedures for the data terminal Also check the interface cable between the terminal and the Model 2450 11 5 2 2 Using Remote Digital Loopback RDL The Remote Digital Loopback RDL test checks the performance of both the local and remote Model 2450s and the communication link between them Any characters sent to the remote Model 2450 in this test mode will be returned back to the originating device For example characters typed on the keyboard of the local terminal will appear on the local terminal screen after having been passed to the remote Model 2450 and looped back To perform an RDL test follow these
12. e company may make changes in its facilities equipment operations or procedures that could affect the proper operation of the Model 2450 Series If this happens the telephone company should give you advance notice to prevent the interruption of your service The telephone company may decide to temporarily discontinue your service if they believe your Model 2450 Series may cause harm to the telephone network Whenever possible they will contact you in advance If you elect to do so you have the right to file a complaint with the FCC The telephone company may ask you to disconnect the equipment from the telephone network until the problem has been corrected or until you are certain that the Model 2400 Series is not malfunctioning The following information may be required when applying to your local telephone company for leased line facilities Service Digital Facility Service Order Network Type Interface Code Code Jacks 56 Kbps 04 DU5 56 6 0F RJ48S 64 Kbps 04DU5 64 6 0F RJ48S 1 3 SERVICE INFORMATION All warranty and non warranty 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 Technical Support 301 975 1007 hitp www patton com or support patton com Notice Packages received without an RMA number will not be accepted Patton Electronics tech
13. l 2450 is equipped with an IEC 320 shrouded male connector This connects with one of several available country specific power cords see the ordering information in Appendix C You may purchase these power cords from Patton Electronics or from a local vendor of your choice 5 0 OPERATION Once you have configured the Model 2450 properly see Section 3 0 and made line DTE and power connections correctly see Section 4 0 you are ready to operate the unit s Note the unit is operational as soon as power is applied there is no power switch This section describes the LED status monitors and use of the built in V 54 and V 52 test modes 5 1 LED STATUS MONITORS The Model 2450 features six front panel status LEDs that indicate the condition of the unit and communication link Figure 6 below shows the front panel location of each LED Following Figure 6 is a description of each LED s function ren pE PAI TON Model 2450 MiniLink 56 64 CSU DSU _ Elecironics To V 54 Test Modes TD RD CD NS Error Test 511 Remote OOOO O QO m OOM 511E Local Figure 6 Front view of Model 2450 e TD Transmit Data glows red to indicate an Idle condition or Binary 1 data Green indicates Binary O data e RD Receive Data glows red to indicate an Idle condition or Binary 1 data Green indicates Binary O data e CD Carrier Detect glows green when carrier is active In 64 K
14. line signal Allows remote device in campus clock mode to initiate V 54 loopback For use only in campus short haul configuration Note Local device must be in internal clock mode Switch 1 3 Circuit Assurance On dedicated circuits 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 1 3 Assurance Description On Enabled CTS will go low and the transmitter will be held off if the receiver is in the No Signal state or CD is low Off Disabled The transmitter and CTS will operate without regard to the receiver state Switch S1 4 RTS The RTS input can be forced on ignoring the terminal s RTS signal RTS controls the transmitter by either sending the user s data or sending an idle code 1 4 RTS Description On Forced On Transmitter is always ON Off Follows The RTS input controls the DTE Signal transmitter Switches S1 5 Data Rate This switch controls the data rate on the line RJ 48S port and must match the speed of your digital service 1 5 Setting Off 56 kbps On 64 kbps Switch 1 6 Front Panel Switch Enable Disable Switch S1 6 determines whether the front panel switches may be used to perform diagnostic functions 1 6 Activation Description Off Enabled Front panel switches may be used to activate terminate diagnostics On Disable
15. nical staff is also available to answer any questions that might arise concerning the installation or use of your Model 2400 Technical Service hours 8AM to 5PM EST Monday through Friday 1 4 CE NOTICE The CE symbol on your Patton Electronics equipment indicates that it is in compliance with the Electromagnetic Compatibility EMC directive and the Low Voltage Directive LVD of the Union European EU A Certificate of Compliance is available by contacting Patton Technical Support 2 0 GENERAL INFORMATION Thank you for your purchase of this Patton Electronics product This product has been thoroughly inspected by Patton s qualified technicians If any questions or problems arise during installation or use of this product please do not hesitate to contact Patton Electronics Technical Support at 301 975 1007 2 1 FEATURES Synchronous data rates of 56 or 64 Kbps e Full duplex communication over two dedicated twisted pairs Supports distances to 3 4 miles over 26 AWG wire e Selectable internal external or network rcv recover clock options e Built in V 54 loopback tests and V 52 BER test patterns e Works with 56 Kbps DDS 64 Kbps Clear Channel or private twisted pair circuits e Switchable Circuit Assurance feature e Externally accessible configuration switches e Six front panel LEDs monitor communication and test status e RJ 48S jack provided for line connection e RS 232 amp RS 422 530 versions have DB 25 connector e V 35 version
16. onic data switches data line surge protectors multiplexers transceivers hubs print servers and much more We produce these products at our Gaithersburg MD USA facility and can custom manufacture products for your unique needs We would like to hear from you Please contact us in any of the following ways to tell us how you like this product and how we can meet your product needs today and in the future Web http www patton com Sales E mail sales patton com Support E mail support patton com Phone Sales 301 975 1000 Phone Support 301 975 1007 Fax 301 869 9293 Mail Patton Electronics Company 7622 Rickenbacker Drive Gaithersburg MD 20879 USA We are committed to a quality product at a quality price Patton Electronics is BABT and ISO 9001 certified We meet and exceed the highest standards in the industry CE UL etc It is our business to serve you If you are not satisfied with any aspect of this product or the service provided from Patton Electronics or its distributors please let us know Thank you Burton A Patton Vice President P S Please tell us where you purchased this product 19
17. steps 1 Activate RDL This may be done in two ways First by moving the front panel toggle switch UP to Remote and second by raising pin 21 on the interface Note Make sure S1 7 is OFF 2 Perform a V 52 BER test as described in Section 5 2 3 If the BER test equipment indicates a fault and the Local Analog Loopback test was successful for both Model 2450s you may have a problem with the twisted pair line between the modems You should then check the twisted pair line for proper connections and continuity 5 2 3 Using the V 52 BER Test To use the V 52 BER tests in conjunction with the V 54 loopback tests follow these instructions 1 Locate the 511 511E toggle switch on the front panel of the 2450 and move it UP This activates the V 52 BER test mode and transmits a 511 pseudo rando test pattern into the loop If any errors are present the local modem s red Error LED will blink sporadically 2 If the above test indicates no errors are present move the V 52 toggle switch DOWN activating the 511 E test with errors present If the test is working properly the local modem s red Error LED will glow A successful 511 E test will confirm that the link is in place and that the Model 2450 s built in 511 generator and detector are working properly Note The above V 52 BER tests can be used independently of the V 54 loopback tests This requires two operators one to initiate and
18. terface pinouts for Model 2450 RJ 48S jack 4 1 1 CONNECTING OVER PRIVATE TWISTED PAIR If you are using a pair of Model 2450s as short range modems over private twisted pair make the connection between them using a twisted pair crossover cable pinned according to the diagram below RJ 48S Cable 4 Wire SIGNAL PIN PIN SIGNAL TX f ee 7 RX TX P 8 RX RX Jae 1 TX RX garii 2 TX 8 4 2 DTE TERMINAL CONNECTION The Model 2450 is wired to connect to a DTE If your terminal device is DCE call Patton Technical Support at 301 975 1007 for specific installation instructions Four versions of the Model 2450 are available with respect to DTE interface and connector type see Appendix C All versions connect to the DTE using a straight through cable When constructing or purchasing your interface cable refer to the pinout diagrams in Appendix D 4 3 AC POWER CONNECTION Power is supplied to the Model 2450 by a 10 VAC 1 A wall mount transformer This transformer connects to the Model 2450 by means of a cannon jack on the rear panel The Model 2450 is powered up as soon as it is plugged into an AC outlet there is no power switch 4 3 1 120 VAC Power US The 120 VAC adapter supplied with the standard version of the Model 2450 is a wall mount type and may be plugged into any approved 120 VAC wall plug 4 3 2 230 VAC Power IEC The 230 VAC adapter supplied with the international version of the Mode
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