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Paradyne 7511 User Manual

Dual dsu
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MODEL 7511
DUAL DSU
USER'S GUIDE
Document No. 7511-A2-GB20-00
June 1997

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Summary of Contents for Paradyne 7511

  • Page 1 MODEL 7511 DUAL DSU USER’S GUIDE Document No. 7511-A2-GB20-00 June 1997...
  • Page 2 Via the Internet: Visit the Paradyne World Wide Web site at http://www.paradyne.com Via Telephone: Call our automated call system to receive current information via fax or to speak with a company representative. — Within the U.S.A., call 1-800-870-2221 — International, call 727-530-2340 Printed on recycled paper June 1997 7511-A2-GB20-00...

  • Page 3: Table Of Contents

    About This Guide Document Purpose and Intended Audience Document Summary Product-Related Documents About the Dual DSU Model 7511 Dual DSU Features DSU Configurations Configuring and Installing the DSUs Configuring the Dual DSU Installing the Rear Connector Plate Installing the DSU Card...
  • Page 4 ..........June 1997 7511-A2-GB20-00...

  • Page 5: About This Guide

    About This Guide Document Purpose and Intended Audience This guide contains information needed to set up, configure, and operate the Model 7511 DSU and is intended for installers and operators. Document Summary Section Chapter 1 Chapter 2 Chapter 3 Chapter 4...

  • Page 6: Product-Related Documents

    To order additional product documentation, refer to Information Document Title COMSPHERE 3000 Series Carrier Installation Manual Network Interface Cable, Network Interface Module Installation Model 7511 Dual DSU Startup Instructions on page A at the beginning of this User’s Guide. June 1997 Warranty, Sales, and Service 7511-A2-GB20-00...

  • Page 7: About The Dual Dsu

    Interoperability. Line-compatible with Model 3510, 3511, 3550, 3551, 3610, 3611, 3615, 3616, 7510, 7610 and 7612 DSUs on the DDS Primary Channel. Reliability. The 7511 Dual DSU’s Mean Time Between Failures (MTBF) is over 30 years. 7511-A2-GB20-00...

  • Page 8: Dsu Configurations

    DSUs can also be used for point-to-point DDS or frame relay applications. DSUs can be connected back-to-back to act as Local Area Data Sets. Table B-2 in Appendix B shows the maximum distances for LADS applications. Model 7511 DSU in 3000 Series Carrier Network...

  • Page 9: Configuring And Installing The Dsus

    Configuring the Dual DSU HANDLING PRECAUTIONS FOR STATIC-SENSITIVE DEVICES The Model 7511 Dual DSU is designed to protect sensitive components from damage due to electrostatic discharge (ESD) during normal operation. When performing installation procedures, however, take proper static control precautions to prevent damage to equipment. If...
  • Page 10 Configuring and Installing the DSUs Figure 2-1. Model 7511 Switch Locations Table 2-1. Configuration Options (1 of 5) Switch Line Rate S1-1 (DSU A) S3-1 (DSU B) 97-15396 Options and Usage DDS or LADS line rate. 56 kbps The line rate is 56 kbps.
  • Page 11 S1-4 (DSU A) S3-4 (DSU B) Network-Initiated DSU Loopback S1-5 (DSU A) S3-5 (DSU B) 7511-A2-GB20-00 Configuring and Installing the DSUs Options and Usage The timing source for the DSU. Off Off For DDS, both switches must be Off. For LADS:...
  • Page 12 CT114 (TXC) is phase-inverted with respect to interchange circuit CT103 (TXD). This can reduce errors encountered due to excessive cable lengths. Normal TXC is not inverted. Invert TXC is inverted with respect to TXD. June 1997 Default in Bold 7511-A2-GB20-00...
  • Page 13 S2-1 & S2-2 (DSU A) S4-1 & S4-2 (DSU B) S2-3 (DSU A) S4-3 (DSU B) S2-4 (DSU A) S4-4 (DSU B) 7511-A2-GB20-00 Configuring and Installing the DSUs Options and Usage Determines the operation of interchange circuit CT106, Clear to Send (CTS). Off Off...
  • Page 14 DTE using interchange circuit CT140, Remote Loopback (RL). If enabled, the remote DSU must be able to detect the in-band V.54 loopback sequence. Disable The DSU will not initiate the loopback on command from the DTE. Enable The DSU initiates the loopback. June 1997 Default in Bold 7511-A2-GB20-00...

  • Page 15: Installing The Rear Connector Plate

    1. At the rear of the carrier, place the tab on the connector plate in its slot in the carrier’s backplane. The connector plate must use the same slot position intended for the DSU card. 2. Loosely fasten the screw, allowing for a slight adjustment when installing the DSU card. 7511-A2-GB20-00 25-Pin DTE Connectors 97-15484 June 1997...

  • Page 16: Installing The Dsu Card

    2. At the front of the carrier, hold the circuit card vertically with the latch on its faceplate in the open position. Then insert the circuit card into the top and bottom circuit card guides. Circuit Pack Lock Circuit Closed Card (Locked) Guides Open (Unlocked) Latch 495-14813 June 1997 7511-A2-GB20-00...
  • Page 17 — If the hardware passes the self-test, the Test LED turns off and the OK LED remains on. 7. Return to the rear of the carrier and tighten the screw on the rear connector plate. 7511-A2-GB20-00 Configuring and Installing the DSUs 495-14797 June 1997...

  • Page 18: Installing The Network And Dte Cables

    Installing the Network and DTE Cables Procedure To install the cables: 1. Note the location of the 7511 Dual DSU circuit cards in the carrier (slots 1–8, slots 9–16, or all slots). 2. Connect network cables to the appropriate Network Interface Module (NIM) and backplane connector according to the following table.

  • Page 19: Monitoring The Dsus

    Monitoring the DSUs Selecting a DSU The 7511 comprises two DSUs, designated DSU A and DSU B. The DSU A and DSU B LEDs designate which DSU is selected. To select the other DSU for monitoring or testing, press the A/B switch on the faceplate.

  • Page 20: Status Leds

    Monitoring the DSUs Status LEDs The status LEDs show the general state of the 7511 card and its DSUs. Status Alrm Alrm Test Mode 7511 ON – The 7511 is operational. OFF – The 7511 is performing a power-on self-test (POST) or has detected a system failure.

  • Page 21: Network Leds

    DSU. Status Alrm Alrm Test Mode 7511 7511-A2-GB20-00 NS – Network Interface No Signal: ON – A No Signal condition was detected on the selected DSU. OFF – There is a signal present on network interface of the selected DSU.

  • Page 22: Dsu Selection Leds

    Monitoring the DSUs DSU Selection LEDs The DSU selection LEDs show which of the two DSUs on the 7511 card is selected for monitoring and testing. The selection is performed by pressing the A/B momentary switch between the two selection LEDs.

  • Page 23: Test

    The test LEDs aid in test selection and show the presence of any ongoing test. Status Alrm Alrm Test Mode 7511 7511-A2-GB20-00 TEST: ON – A test is in progress on the selected DSU. (See note below.) OFF – No test is in progress on the selected DSU. LL – Local Loopback: ON –...

  • Page 24: Port

    Status Alrm Alrm Test Mode 7511 TXD (103) – Transmitted Data: ON – Zeroes are being received from the DTE. OFF – Ones are being received from the DTE. RXD (104) – Received Data: ON – Zeroes are being transmitted to the DTE.

  • Page 25: Testing

    Testing Selecting a DSU The 7511 comprises two DSUs, designated DSU A and DSU B. The DSU A or DSU B LED in its lighted state designates the selected DSU. To select the other DSU for monitoring or testing, press the A/B switch on the faceplate.

  • Page 26: Csu Or External Network Loopback

    CSU or External Network Loopback CSU loopback is an external loopback that is located as closely as possible to the network interface. A CSU loopback is initiated by the network. Port Aggregate Interface CSU Loopback June 1997 Network Port 496-15144 7511-A2-GB20-00...

  • Page 27: Digital Loopback (Dl) And Remote Loopback (Rl)

    4. Wait three seconds. The TEST LED lights up and the test begins. (If the TEST LED never lights up and the RL LED turns off, the V.54 Loop Up command was not acknowledged by the remote unit.) Port 7511-A2-GB20-00 Aggregate Interface DSU Loopback...

  • Page 28: Ending An Active Test

    — Network, such as the network-initiated CSU and DSU Loopbacks. — DTE, such as the DTE-initiated Local Loopback. Using the Test Mode switch. Press the Test Mode switch at any time during a test to abort the test. Configuring the Dual DSU June 1997 in Chapter 2. 7511-A2-GB20-00...
  • Page 29 Only the Alarm LEDs are on after power-up. An LED is not lit. No power, or the LEDs are not lit. 7511-A2-GB20-00 Possible Cause Recommendations If the NS LED is lit: conditions exists: – Verify that the DSU is...
  • Page 30 Move switch S2-8 to the Off S2-8 is for Manufacturing position. use only and may affect the DSU’s behavior. The remote unit failed to Check the remote unit. acknowledge the V.54 Loop Up command. June 1997 , Chapter 4. Specifications. 7511-A2-GB20-00...

  • Page 31: Overview

    DSUs: The NIM inserted in the 3000 Carrier connectors P24 and P23 has a 50-pin connector that supports DSU A for Model 7511 Dual DSUs in slots 1–8. The 3000 Carrier backplane has a 50-pin connector designated P21 that supports DSU B on Model 7511 Dual DSUs in slots 1–8.

  • Page 32: Digital Network (Dds) Connector

    COMSPHERE 3000 Series Carrier and RJ48T NIM Receive Circuits Digital Network (DDS) Connector Pin Assignments Circuit Function Transmit data to local loop Transmit data to local loop Received data from local loop Received data from local loop June 1997 Transmit Circuits 7511-A2-GB20-00...

  • Page 33: V.35 Dte Connector

    V.35 DTE Connector The Model 7511 Dual DSU is shipped with a rear connector plate, which is mounted onto the rear of the 3000 Series Carrier. The plate contains two 25-pin CCITT V.35 DTE connectors. Two V.35 interconnect cables, interfaces between the 25-pin CCITT V.35 connectors and standard 34-pin V.35 connectors, are...
  • Page 34 Cables and Pin Assignments 25-Pin Plug Connector Figure A-2. V.35 Interconnect Cable Table A-3. Model 7511 Dual DSU 25-Pin CCITT V.35 Connector Pins 25-Pin Connector on Rear Connector Plate 24, 11 23, 22 15, 2 16, 3 14, 1 12 Inches...

  • Page 35: Technical Specifications

    Technical Specifications Table B-1. Model 7511 DSU Technical Specifications (1 of 2) Item Size Height Width Depth Weight Approvals FCC Part 15 FCC Part 68 Safety Certifications Emissions Interface and Connectors 25-pin D-subminiature connector with 34-pin adapter cable Physical Environment...
  • Page 36 Technical Specifications Table B-1. Model 7511 DSU Technical Specifications (2 of 2) Item Network Interface Data rates LADS data rates Services supported Network Compatibility ANSI T1.410-1992 and AT&T Technical Reference 62310-1993 Table B-2. Model 7511 DSU LADS Connection Distances Data Rate...
  • Page 37 Data Service Unit. Data communications equipment that provides an interface between the DTE and the digital network. Data Terminal Equipment. The equipment, such as computers and printers, that provides or creates data. Data Terminal Ready. An EIA-lead standard for V.24 circuit CT 108; an input signal (DTE-to-DCE). 7511-A2-GB20-00 June 1997 GL-1...
  • Page 38 Out Of Frame. An error condition in which frame synchronization bits are in error. A network-reported condition. Out of Service. A digital network trouble signal. point-to-point circuit A data network circuit with one control and one tributary device. GL-2 June 1997 7511-A2-GB20-00...
  • Page 39 Transmit Data. An EIA-lead standard for V.24 circuit CT 103; an input signal (DTE-to-DCE). V.35 ITU-T standard for a high-speed, 34-pin, DCE/DTE interface. Wide Area Network. A network that operates over long distances and spans a relatively large geographic area (e.g., a country). 7511-A2-GB20-00 June 1997 Glossary GL-3...
  • Page 40 V.35, A-3 CSU loopback, 4-2 CT140, configuration option, 2-6 CT141, configuration option, 2-6 CTS (Clear To Send), configuration option, 2-5 7511-A2-GB20-00 data scrambling, 2-4 DDS, setting line rate, 2-2 Digital Loopback (DL), 4-3 digital network, interface (RJ48T), A-2 distances, maximum for LADS connection, B-2...
  • Page 41 CT140 configuration option, 2-6 test fails, 5-2 RJ48T connector pins, A-2 RTS (Request To Send), configuration option, 2-5 safety instructions. See Start-Up Instructions selecting a DSU, 3-1 specifications, 1-1, B-1 Status LEDs, 3-2 switches location, 2-2 procedure for setting, 2-1 June 1997 7511-A2-GB20-00...
  • Page 42 Mode switch, 4-1, 4-3, 4-4, 5-2 timing source, 2-3 timing source, 2-3 troubleshooting, 5-1 TX Clock, inverting, 2-4 TX Timing Source, configuration option, 2-3 7511-A2-GB20-00 V.35 connector, A-3 interconnect cable, A-4 connector pins, A-4 V.54 Sequence Detection configuration option, 2-4...

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