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Paradyne HotWire 7925 User Manual

Standalone e1 hdsl termination unit
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AREA CODE CHANGE
Please note that the area code for
Paradyne Corporation in Largo, Florida
has changed from 813 to 727.
For any Paradyne telephone number that
appears in this manual with an 813 area
code, dial 727 instead.

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  • Page 1 AREA CODE CHANGE Please note that the area code for Paradyne Corporation in Largo, Florida has changed from 813 to 727. For any Paradyne telephone number that appears in this manual with an 813 area code, dial 727 instead.
  • Page 2 MODEL 7925 STANDALONE E1 HDSL TERMINATION UNIT USER’S GUIDE Document No. 7925-A2-GB20-30 June 1997 PRELIMINARY DRAFT...
  • Page 3 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 813-530-2340 Printed on recycled paper June 1997 7925-A2-GB20-30 PRELIMINARY DRAFT...
  • Page 4 Avoid using a telephone (other than a cordless type) during an electrical storm. There may be a remote risk of electric shock from lightning. — Do not use the telephone to report a gas leak in the vicinity of the leak. 7925-A2-GB20-30 PRELIMINARY DRAFT Important Regulatory Information June 1997...
  • Page 5 To Users of Digital Apparatus in Canada: This Class A digital apparatus meets all requirements of the Canadian interference-causing equipment regulations. Cet appareil numérique de la classe A respecte toutes les exigences du règlement sur le matérial brouilleur du Canada. June 1997 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 6: Table Of Contents

    Contents About This Guide Document Purpose and Intended Audience Document Summary Product-Related Documents About HotWire Model 7925 Standalone Termination Units HotWire 7925 Models and Features Typical Configurations User Interface Types Installing the Unit Package Checklist for HotWire Model 7925-A1 Connecting to the Network...
  • Page 7 ........7925-A2-GB20-30 PRELIMINARY DRAFT...
  • Page 8 V.35-Compatible Units Glossary Index 7925-A2-GB20-30 PRELIMINARY DRAFT ..........

  • Page 9: About This Guide

    7925-A2-GB20-30 PRELIMINARY DRAFT Description About HotWire Model 7925 Standalone Termination Units . Describes the features of each version of the Model 7925 and typical configurations. Installing the Unit . Describes how to install the unit and make connections. Using Terminal and Switchpack Modes. Provides instructions for connecting a VT100-compatible terminal user interface.
  • Page 10 HotWire Model 7900 Equipment Nest and Options Installation Guide HotWire Model 7900 Standalone Unit Nest Installation Guide HotWire Models 7924 and 7925 T1 & E1 HDSL Nest Cards User’s Guide on page A at the beginning of this User’s Guide. June 1997...

  • Page 11: Hotwire 7925 Models And Features

    Tolerating bridged tap Local and remote alarm surveillance and performance monitoring HotWire 7925 may be ordered either as a standalone unit (7925-A1-xxx) or as a nest-mounted card (7925-B1-xxx) that fits in a HotWire 7900 nest. This guide describes the installation and maintenance procedures for the standalone version, Model 7925-A1-xxx.
  • Page 12 About HotWire Model 7925 Standalone Termination Units There are several versions of the Model 7925-A1, each supporting a different interface (G.703 or V.35) and power supply (– 48 Vdc, 220 Vac, or 120 Vac): Model Number 7925-A1-201 7925-A1-202 7925-A1-301 7925-A1-302...

  • Page 13: Typical Configurations

    In each pair, one unit is configured as a central site or central office (CO) and the other is the remote (CP). Each HotWire Model 7925 standalone unit is configured at the factory to operate at the CP side of an E1 HDSL connection. However, you can easily reconfigure a unit for use at the CO end, as would be necessary for the configurations in Figure 1-1.
  • Page 14 About HotWire Model 7925 Standalone Termination Units HotWire Model 7925 standalone units are also ideal for delivering E1 services from a central site to the customer premises over long loop distances without repeaters. Figure 1-2 shows a central office application with a HotWire Model 7900 Nest containing HotWire Model 7925 nest cards.

  • Page 15: User Interface Types

    Cellular network providers must lease large numbers of E1 circuits in order to connect remote cell sites to mobile telephone switching offices (MTSOs). HotWire Model 7925 products provide an alternative to standard repeatered E1 services. Figure 1-3 depicts a typical cellular network access application.

  • Page 16: Package Checklist For Hotwire Model 7925-A1

    Installing the Unit Package Checklist for HotWire Model 7925-A1 Verify that your package contains the following: A HotWire Model 7925-A1 standalone unit VT100 Terminal Cable A 14 twisted pair network cable Power cord with power transformer (optional) Warranty card V.35-compatible units only: a ferrite bead for RFI suppression...

  • Page 17: Connecting Power To The Unit

    Installing the Unit Connecting Power to the Unit HDSL G.703-Compatible HotWire 7925 – Rear Panel HDSL V.35-Compatible HotWire 7925 – Rear Panel As described in Chapter 1, there are several options for power cords, depending on your power source (120 Vac, 230 Vac, or – 48 Vdc).

  • Page 18: Choosing An Interface Mode

    Switchpack Mode. Connecting to a System Terminal An optional system maintenance terminal may be attached to your Model 7925 standalone termination unit through the modular jack on the front panel. You may have terminals attached to both endpoints (HTU-C and HTU-R).

  • Page 19: Switching Between Terminal And Switchpack Modes

    Appendix C. 6. Power up the board to reset and enable the new configuration. Cable Pin Assignments Chapters 4 Switchpacks and Jumpers , for jumper locations on your Switchpacks and June 1997 , for the for the Jumpers, 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 20: Accessing Configuration Options

    Units Accessing Configuration Options This chapter provides instructions on how to change configuration options for HotWire 7925 standalone units that are G.703-compatible. similar information for V.35-compatible units. Configuration option settings determine how the unit operates. You can change a unit’s configuration options by: Selecting the Board Configuration branch of the Main Menu while in Terminal Mode.

  • Page 21: Making Changes From The Terminal Interface

    CP side of an HDSL connection. This is the default configuration for Model 7925-A1 units. The Main menu for a unit configured for use on the CO side is identical, except that option 8 is HTUR Menu.
  • Page 22 120 ohm – Used with modular cable connection on rear panel. You must also change the position of jumpers C31, C33. P6, and P7 on the board. Refer to Changing the Line Build-Out , on page 4-4. 7925-A2-GB20-30 PRELIMINARY DRAFT Customizing G.703-Compatible Units...

  • Page 23: Changing The Line Build-Out

    OFF for 75 ohm LBO or ON for 120 ohm LBO. 7. Replace the enclosure cover and power up the board to reset and enable the new line build-out setting. Switchpacks and Jumpers , Appendix C, for switchpack and jumper June 1997 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 24: Making Changes In Switchpack Mode

    4 – Not Used 5 – Line Build Out 6 – Not Used 7 – Not Used 8 – Framed/Unframed Config 7925-A2-GB20-30 PRELIMINARY DRAFT Customizing G.703-Compatible Units Switching Between Terminal and Switchpack Modes , Appendix C. Switchpacks and Jumpers OFF=CP, ON=CO...

  • Page 25: Displaying Line Build-Out Definitions

    SWITCHPACK AND BOARD SETTINGS FOR LINE BUILD OUT Jumpers P6 and P7 on Stand Alone Jumpers P4 and P5 on Shelf Mount OFF=75 ohm ––––––––––––––––––––––––––––––––– ON=120 ohm 1 & 2 for 120 ohm lines 2 & 3 for 75 ohm lines June 1997 ******* 7925-A2-GB20-30 PRELIMINARY DRAFT...
  • Page 26 Units Accessing Configuration Options This chapter provides instructions on how to change configuration options for HotWire 7925 standalone models that are V.35-compatible. similar information for G.703-compatible units. Configuration option settings determine how the unit operates. You can change a unit’s configuration options by: Selecting the Board Configuration branch of the Main Menu while in Terminal Mode.
  • Page 27 CP side of an HDSL connection. This is the default configuration for Model 7925 units. The Main Menu for a unit configured for use on the CO side is identical, except that option 7 is HTUR Menu.
  • Page 28 External – The V.35 interface is used as the primary clock source. Internal – The internal clock is used as the primary clock source. Loop – The HDSL line is used as the primary clock source. 7925-A2-GB20-30 PRELIMINARY DRAFT Customizing V.35-Compatible Units 6 –...
  • Page 29 CO, move DIP switch 1 on switchpack 1 to the ON position. 4. Replace the enclosure cover and power up the board to reset and enable the new configuration. Displaying Switchpack Definitions Switching Between Terminal and Switchpack Modes , Appendix C. June 1997 in Chapter 3. Switchpacks and 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 30: Displaying Switchpack Definitions

    Switchpacks and Config Switch pack 1 definition: 4,5 – 6–8 – Switch pack 2 definition: All switches off = 2048 Kbps (32x64) Config 7925-A2-GB20-30 PRELIMINARY DRAFT – CO/CP – Double/Single Loop Mode – Not Used...

  • Page 31: Monitoring The Unit

    Performance Monitor option from the Main Menu Board Status and Performance Monitor options from the HTUC (or HTUR) Menu (for displaying information about the unit on the other end of the connection) Front Panel LEDs 7925-A2-GB20-30 PRELIMINARY DRAFT June 1997...

  • Page 32: Board Status

    LOOP A is UP, LOOP B is UP Loop A = 44.0 dB, Loop B = 43.5 dB ACTIVE ACTIVE LOOP A is UP, LOOP B is UP Loop A = 44.0 dB, Loop B = 43.5 dB. June 1997 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 33: Performance Statistics

    – 12 hour stats. – 24 hour stats. – Running total. – Clear Statistics. – Quit stats Select a time frame from the above list to display statistics for a specified time period. 7925-A2-GB20-30 PRELIMINARY DRAFT 17:31:51 June 1997 Monitoring the Unit...
  • Page 34 (AMI or HDB3). Refer to the definitions of the types of errors reported. E1 Errors: – – 0 – FAS – 0 – – – – 0 – FAS – 0 – – June 1997 Glossary 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 35: Remote Unit Information

    If you have a V.35-compatible unit, enter 7 at the Command prompt. ***** HTUC Menu ***** 1) Board Status 2) Performance Monitor 3) Board Configuration 4) Line Build Out Configuration Help ?) Prints this menu Q) Quit HTUC Command 7925-A2-GB20-30 PRELIMINARY DRAFT June 1997 Monitoring the Unit...

  • Page 36: Front Panel Leds

    A failure in HDSL Loop A. (The LED will blink at board power up until the loop has been synchronized.) A failure in HDSL Loop B or the loop has been disabled. (The LED will blink at board power up until the loop has been synchronized.) June 1997 7900 7900 97-15255 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 37: V.35-Compatible Unit

    E1 HDSL TERMINAL Loop Bk FAIL Loop A Loop B 7925-A2-GB20-30 PRELIMINARY DRAFT Meaning A bilateral loopback has been initiated for testing the equipment connected to this unit. Power is applied to the unit. The processor has halted and repairs are required.

  • Page 38: Testing

    Loopback tests may only be initiated through the system terminal. Loopback tests may initiated from either the CO or CP side of the HDSL connection. 7925-A2-GB20-30 PRELIMINARY DRAFT Monitoring the Unit , Chapter 6:...

  • Page 39: Local Loopbacks

    LED lights Terminal (both G.703 or both V.35) E1 HDSL 7900 7900 (both G.703 or both V.35) June 1997 Diagnostic E1 HDSL Equipment 7900 7900 97-15249-01 Diagnostic E1 HDSL Equipment 7900 7900 Loop Bk LED lights 97-15518 Terminal 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 40: Remote Loopbacks

    Figure 7-3 illustrates remote loopback from a CO unit in a connection between two units of the same compatibility (either two G.703-compatible units or two V.35-compatible units). Diagnostic Equipment Figure 7-3. Remote Loopback from CO End, Two Like Units 7925-A2-GB20-30 PRELIMINARY DRAFT E1 HDSL 7900 7900 Loop Bk...

  • Page 41: Starting And Ending Loopbacks

    If you have a G.703-compatible unit, enter 7 at the Command prompt. If you have a V.35-compatible unit, enter 6 at the Command prompt. Command Remote Loopback is Enabled! Command Remote Loopback is Disabled! 6 (5) 6 (5) 7 (6) 7 (6) June 1997 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 42: Resetting The Unit

    Reset will bring the loops down. Are you sure? (y/n) Command If “y” is selected, the Main Menu redisplays, the loops go down, and the FAIL (reset) LED lights. Pressing any key other than “y” is interpreted as an “n”. 7925-A2-GB20-30 PRELIMINARY DRAFT 5 (4) June 1997 Testing...

  • Page 43: Worksheets

    (G.703-compatible or V.35-compatible) on either end of the HDSL connection. There are three combinations of the two types of units: G.703-compatible units on both ends V.35-compatible units on both ends V.35-compatible unit on the CP end, G.703-compatible unit on the CO end 7925-A2-GB20-30 PRELIMINARY DRAFT June 1997...

  • Page 44: G.703-To-G.703 Configuration

    2048 kbps, select Framed; else select either option) 75 ohm or 120 ohm 75 ohm or 120 ohm (does not need to be the same as the CP side) Changing the Line Build-Out June 1997 in Chapter 4 for instructions. 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 45: V.35-To-V.35 Configuration

    To connect two V.35-compatible units, configure the units as follows (factory defaults are in bold): Configuration Option Card Type Loops Enabled Payload Rate Transmit Timing 7925-A2-GB20-30 PRELIMINARY DRAFT V.35-Compatible Unit V.35-Compatible Unit (Customer Premises) (Central Site) Dual (Loops A & B) or Must be same as CP side Single (Loop A) 1 –...

  • Page 46: G.703-To-V.35 Configuration

    Must be same as CP side If the payload rate is 2048 Kbps, use Unframed. If the payload rate is less than 2048 Kbps, use Framed. HDB3 or AMI 75 ohm or 120 ohm in Chapter 4 for instructions. 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 47: G.703-Compatible Units Configuration Worksheet

    Line Build Out V.35-Compatible Units Configuration Worksheet Board Configuration Configuration Option HDSL Card Type Loops Enabled Payload Rate Transmit Timing 7925-A2-GB20-30 PRELIMINARY DRAFT Settings CP, CO Loops A and B, Loop A HDB3, AMI Framed, Unframed 75 ohm, 120 ohm...

  • Page 48: Terminal Connection Cable Pin Assignments

    This section defines the pin assignments for the terminal cable from the front panel modular jack to your PC’s COM port. If your PC’s COM port requires a 9-pin D-shell connector, the cable must use the following pin assignments. Modular 7925-A2-GB20-30 PRELIMINARY DRAFT 9-Pin D-Shell Pin 97-15268-01...

  • Page 49: Hdsl Loop Connection Cable Pin Assignments

    5 – 8 NOTE: Pin 1 is on the left when viewing the jack from its inserted position. 25-Pin D-Shell Pin 97-15442 Signal Loop A Tip Loop A Ring Loop B Tip Loop B Ring unused June 1997 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 50: E1 Network 120 Ohm Connection Cable Pin Assignments

    The 120 ohm modular connector that plugs into the rear panel of G.703-compatible units has the following pin assignments. 6 – 8 NOTE: Pin 1 is on the left when viewing the jack from its inserted position. 7925-A2-GB20-30 PRELIMINARY DRAFT Signal Tx Ring Tx Tip...
  • Page 51 Use Figure C-1 to assist you in locating the switchpacks and jumpers on the board. The jumpers and switchpack detailed in Figure C-1 are used to change configuration options. All other jumpers (listed below) should always be left as positioned at the factory. Jumper 7925-A2-GB20-30 PRELIMINARY DRAFT Pins (Factory-Setting) 2–3 No Jumper 2–3 2–3...
  • Page 52 Modular Jack Jumper P11 Pins* Settings* Terminal Mode Switchpack Mode Jumpers P6, P7 Pins* Settings* 120 ohm line build-out 75 ohm line build-out Jumpers C31, C33 Pins* Settings* 75 ohm line build-out 120 ohm line build-out 97-15266-02 7925-A2-GB20-30 PRELIMINARY DRAFT...

  • Page 53: V.35-Compatible Units

    Use Figure C-2 to assist you in locating the switchpacks and jumpers on the board. The jumpers and switchpacks detailed in Figure C-2 are used to change configuration options. All other jumpers (listed below) should always be left as positioned at the factory. Jumper 7925-A2-GB20-30 PRELIMINARY DRAFT Pins (Factory-Setting) 2–3 1–2 2–3 No Jumper 2–3...
  • Page 54 ON = 256 kbps ON = 384 kbps ON = 512 kbps ON = 768 kbps ON = 1024 kbps All ON = 64 kbps All OFF = 2048 kbps Jumper P8 Pins* Settings* Terminal Mode Switchpack Mode 97-15265-02 7925-A2-GB20-30 PRELIMINARY DRAFT...
  • Page 55 Far End Bit Error. Number of errors reported by the remote equipment. HDB3 High Density Bipolar 3 coding format. HDSL High-bit-rate Digital Subscriber Loop. Provides high bandwidth, bi-directional transmission over copper wire for both T1 and E1 services. 7925-A2-GB20-30 PRELIMINARY DRAFT June 1997 GL-1...
  • Page 56 A data signaling rate common in the United States. A term for a digital carrier facility used to transmit a DS1 formatted signal of 1.544 Mbps. V.35 ITU-T standard for a high-speed, 34-pin, DCE/DTE interface. GL-2 June 1997 7925-A2-GB20-30 PRELIMINARY DRAFT...
  • Page 57 V.35-compatible unit, A-5 data rate for V.35-compatible units, 5-3 framing options, 4-3 G.703 to G.703 configuration, A-2 G.703 to V.35 configuration, A-4 glossary, GL-1–GL-4 7925-A2-GB20-30 PRELIMINARY DRAFT HDB3 line encoding, 4-3 installation, 2-1 jumpers G.703-compatible unit, C-1 V.35-compatible unit, C-3 LEDs, 6-6 G.703-compatible unit, 6-6...
  • Page 58 3-2 testing, 7-1 timing options, 5-3 transmit timing options, 5-3 user interface, 1-5, 3-1 V.35 to G.703 configuration, A-4 V.35 to V.35 configuration, A-3 VT100 interface, 3-1 worksheets, A-1A Level1 Level 2 Level June 1997 7925-A2-GB20-30 PRELIMINARY DRAFT...

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