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PairGain HiGain HRU-412 Manual

Remote unit
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I
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EMOTE
NIT
Model
List Number Part Number
CLEI Code
HRU-412
7A
150-1103-71
T1L2CL0A
P
G
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, I
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AIR
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ECHNOLOGIES
NC
E
S
T
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NGINEERING
ERVICES
ECHNICAL
RACTICE
S
150-412-171-04
ECTION

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Summary of Contents for PairGain HiGain HRU-412

  • Page 1 EMOTE Model List Number Part Number CLEI Code HRU-412 150-1103-71 T1L2CL0A ECHNOLOGIES NGINEERING ERVICES ECHNICAL RACTICE 150-412-171-04 ECTION...
  • Page 2 No license is granted by implication or otherwise under any patent or patent rights of PairGain Technologies. PairGain Technologies reserves the right to change specifications at any time without notice.
  • Page 3 OCUMENTATION If you have comments on this PairGain document, send an email to technical_publications@pairgain.com. Type the product name and the section number of the document in the subject area of the email message.
  • Page 4 Inspecting the Shipment 150-412-171-04, Revision 04 November 23, 1999 HRU-412 List 7A...

  • Page 5: Table Of Contents

    150-412-171-04, Revision 04 Table of Contents ABLE OF ONTENTS Overview _______________________________________________ 1 Applications ____________________________________________ 2 Front and Rear Panel_____________________________________ 3 Installation _____________________________________________ 9 Install the HRU-412 List 7A............ 9 Installation Test..............10 Remote Login __________________________________________ 11 Connecting to a Maintenance Terminal ......... 11 Logging On and Off...............
  • Page 6 List of Figures 150-412-171-04, Revision 04 IST OF IGURES 1. HRU-412 List 7A Front Panel ..............3 2. HRU-412 List 7A Rear Panel ..............7 3. Connecting to a Maintenance Terminal..........11 4. HRU-412 List 7A Loopbacks ...............15 5. HRU-412 List 7A Pinouts..............19 6.

  • Page 7: Overview

    150-412-171-04, Revision 04 Overview VERVIEW ® ® The PairGain HiGain Remote Unit, Model HRU-412 List 7A, is the remote end of a repeaterless T1 transmission system. An HRU-412 List 7A connects to a HiGain Line Unit (HLU-231, HLU-232, HLU-319, or HLU-388), creating a HiGain system that provides 1.544 Mbps transmission on two...

  • Page 8: Applications

    Applications 150-412-171-04, Revision 04 The HRU-412 List 7A supports PairGain’s 1-by-1 Protection Switching System, and it can be line powered or locally powered with a metallic sealing current option that is compatible with all HiGain line and doubler units. The...

  • Page 9: Front And Rear Panel

    150-412-171-04, Revision 04 Front and Rear Panel RONT AND ANEL Figure 1 shows the front view of the HRU-412 List 7A. Table 1 describes the unit’s front panel components. Figure 1. HRU-412 List 7A Front Panel HRU-412 List 7A November 23, 1999...
  • Page 10 Front and Rear Panel 150-412-171-04, Revision 04 Table 1. HRU-412 List 7A Front Panel Components Name Function Test points Allow measurement of the 60 mA CPE current. The current is related to the voltage measurement across the + and - test points by the following relationship: CPE CURRENT=1 mA / 1 mV.
  • Page 11 150-412-171-04, Revision 04 Front and Rear Panel Table 1. HRU-412 List 7A Front Panel Components (Cont.) Name Function HDSL LEDs The LP1 OK LED flashes green while HDSL Loop 1 is synchronizing with the HLU. The LED is a steady green indicating that Loop 1 is properly synchronized with the HLU.
  • Page 12 Front and Rear Panel 150-412-171-04, Revision 04 Table 1. HRU-412 List 7A Front Panel Components (Cont.) Name Function Configuration For some products the configuration number may contain either a number five- or six-digit warranty configuration number or a standalone two- or three-digit configuration number as follows: Digit 1 - Last digit of shipment year.
  • Page 13 150-412-171-04, Revision 04 Front and Rear Panel The HRU-412 List 7A rear panel features are shown in Figure 2 described in Table Figure 2. HRU-412 List 7A Rear Panel HRU-412 List 7A November 23, 1999...
  • Page 14 Front and Rear Panel 150-412-171-04, Revision 04 Table 2. Rear Panel Components Switch Setting Function I-CPE Sets the CPE current to 0 mA. Sets the CPE current to 60 mA to power an external NID. The CPE current control signals terminate on pins 32 and 34 of the card-edge converter.

  • Page 15: Installation

    NSTALL THE Be sure to wear an antistatic wrist strap. Avoid touching static-sensitive components on the circuit board. For indoor installation, the HRU-412 List 7A mounts in the following PairGain shelves: • HRE-421 (double-width, single mount) • HRE-422 (double-wide, double mount) •...

  • Page 16: Installation Test

    Installation 150-412-171-04, Revision 04 When locally powered, the HRU-412 can be configured to provide 15 mA (short loop) to 10 mA (long loop) metallic sealing current toward all versions of the HLU over the two HDSL pairs. JP2, shown in Figure 2, allows the sealing current to be enabled or disabled.

  • Page 17: Remote Login

    150-412-171-04, Revision 04 Remote Login EMOTE OGIN The HRU-412 List 7A supports remote login through a maintenance terminal or PC connected to its front-panel RS-232 craft port. Remote login creates menus and screens for the HRU-412 that are identical to those at the HLU. Once logged on you can access the Remote Terminal Main Menu screens to view system settings and status, and initiate loopbacks.
  • Page 18 Remote Login 150-412-171-04, Revision 04 The HRU-412 front-panel craft port allows you to use a standard serial cable to connect your system to a maintenance terminal or PC running a terminal emulation program. Connect a standard 9-pin serial terminal cable to the craft port, a DB-9 female connector, on the HRU-412.

  • Page 19: Logging On And Off

    150-412-171-04, Revision 04 Remote Login OGGING N AND To log on and access the Remote Terminal Main Menu screens using the maintenance terminal: Press the several times to activate the autobaud feature and SPACEBAR display the Remote Login screen. Press the key to perform a remote login to the HiGain ENTER Maintenance Terminal screens.

  • Page 20: Remote Terminal Main Menu

    Remote Login 150-412-171-04, Revision 04 EMOTE ERMINAL The Remote Terminal Main Menu items are explained in Table Table 3. Remote Terminal Main Menu Items Name Function View Span Status Allows viewing of span status between the HLU and the HRU-412 including span status for doubler devices (multi-span applications).

  • Page 21: Loopbacks

    150-412-171-04, Revision 04 Loopbacks OOPBACKS The HRU-412 List 7A supports 4 types of loopbacks (see Figure • TLOS (transmit loss of signal) • NREM (network remote loopback) • CLOC (customer local loopback) • SMJK (SmartJack) Loopback tests can be initiated by using in-band codes or maintenance terminal commands, or by faceplate pushbutton activation.
  • Page 22 Loopbacks 150-412-171-04, Revision 04 A SmartJack loopback causes the T1 interface chip to transmit the AIS pattern to the NI and back to the HRU-412 List 7A T1 receiver circuit. The T1 input to the HRU-412 List 7A at the XMT port is disconnected and terminated in 100 .
  • Page 23 150-412-171-04, Revision 04 Loopbacks All HRU-412 List 7A loopbacks toward the network (NREM and SMJK) are metallic/logic (AIS/ENA) or metallic only (AIS/DIS). The TLOS loopback is a logic loopback. The SMJK and NREM loopbacks perform the same functions; their initiation differs.

  • Page 24: Appendix A - Specifications

    Appendix A - Specifications 150-412-171-04, Revision 04 A - S PPENDIX PECIFICATIONS HDSL Line Code 784 kbps 2B1Q full duplex HDSL Output +13 dBm + 0.5 dB at 135 HDSL Line Impedance HDSL Startup Time 15 seconds (typical), 60 seconds (maximum) Maximum Provisioning Loss 35 dB at 196 kHz, 135...

  • Page 25: Pinouts

    150-412-171-04, Revision 04 Appendix A - Specifications INOUTS The HRU-412 List 7A pinouts are shown in Figure 5. The active pins are shown in black. Figure 5. HRU-412 List 7A Pinouts HRU-412 List 7A November 23, 1999...

  • Page 26: Craft Port

    Appendix A - Specifications 150-412-171-04, Revision 04 RAFT Figure 6 shows the craft port wiring diagram. Figure 6. Craft Port Wiring November 23, 1999 HRU-412 List 7A...

  • Page 27: Insertion Loss

    150-412-171-04, Revision 04 Appendix A - Specifications NSERTION The general guideline for HiGain system usage is that each loop must have less than 35 dB of loss at 196 kHz, with 135 driving and terminating impedances. Table 4 provides a guide for the loss over various cable gauges at 196 kHz and 135 .

  • Page 28: Appendix B - Functional Description

    ESCRIPTION PERATIONAL APABILITIES HiGain uses PairGain’s 2B1Q HDSL transceiver system to establish two full-duplex 784 kbps data channels between the HLU and a remotely mounted HRU-412 List 7A. This provides a total transmission capacity of 1.568 Mbps between the two units.
  • Page 29 150-412-171-04, Revision 04 Appendix B - Functional Description If local power to an HRU-412 is lost, the last span loses sync. When the HLU or HDU attempts to reestablish sync, it detects that the HRU-412 is not locally powered and applies line power to it. The HRU-412 then powers up and operates normally if within range to support line powering.

  • Page 30: Appendix C - Product Support

    PairGain product and company information can be found at http://www. pairgain.com using any Web browser. To download PairGain product manuals from the Customer Site portion of the PairGain web page, you need to provide a customer password. If you do not have a password, contact your PairGain sales representative.

  • Page 31: Returns

    To obtain a return authorization number, you need to provide the original purchase order number to PairGain’s Return Material Authorization (RMA) Department. Call or write PairGain’s RMA Department to ask for an RMA number and any additional instructions. Use the telephone number, fax number or email address listed below: •...
  • Page 32 Appendix C - Product Support 150-412-171-04, Revision 04 Pack the equipment in a shipping carton. Write PairGain’s address and the RMA Number you received from the RMA Department clearly on the outside of the carton and return to: PairGain Technologies, Inc.

  • Page 33: Appendix D - Glossary

    150-412-171-04, Revision 04 Appendix D - Glossary D - G PPENDIX LOSSARY Abbreviations used throughout this manual are defined below: 2B1Q 2 Binary,1 Quaternary Alarm Cut Off Alarm Indication Signal indicated by transmission of an all ones pattern Alternate Mark Inversion American Wire Gauge B8ZS Bipolar with 8-zero Substitution...
  • Page 34 Appendix D - Glossary 150-412-171-04, Revision 04 Extended SuperFrame HCDS High Capacity Digital Service HDSL High-bit-rate Digital Subscriber Line HiGain Doubler Unit HiGain Line Unit HiGain Remote Enclosure HiGain Remote Unit I-CPE Current (amperes) requirements for Customer Premises Equipment Light Emitting Diode Loss of Signal LOSW Loss of Sync Word...

  • Page 35: Certification And Warranty

    IMITED ARRANTY PairGain Technologies warrants this product to be free of defects and to be fully functional for a period of 60 months from the date of original shipment, given correct customer installation and regular maintenance. PairGain will repair or replace at PairGain’s option any unit without cost during this period if the unit is found to be defective for any reason other than abuse or incorrect use or installation.
  • Page 36 Corporate Office 14402 Franklin Avenue Tustin, CA 92780 Tel: 714.832.9922 Fax: 714.832.9924 For Technical Assistance: 800.638.0031...

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