Paradyne HotWire 7915 User manual

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.

HOTWIRE
MODEL 7915 STANDALONE
E1 SDSL TERMINATION UNIT
USER’S GUIDE
Document No. 7915-A2-GB20-20
September 1997

Printed on recycled paper
A 7915-A2-GB20-20
September 1997
Copyright 1997 Paradyne Corporation.
All rights reserved.
Printed in U.S.A.
Notice
This publication is protected by federal copyright law. No part of this publication may be copied or distributed,
transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language in any form
or by any means, electronic, mechanical, magnetic, manual or otherwise, or disclosed to third parties without the
express written permission of Paradyne Corporation, 8545 126th Avenue North, P.O. Box 2826, Largo,
Florida 33779-2826.
Paradyne Corporation makes no representation or warranties with respect to the contents hereof and specifically
disclaims any implied warranties of merchantability or fitness for a particular purpose. Further, Paradyne Corporation
reserves the right to revise this publication and to make changes from time to time in the contents hereof without
obligation of Paradyne Corporation to notify any person of such revision or changes.
Changes and enhancements to the product and to the information herein will be documented and issued as a new
release to this manual.
Trademarks
All products and services mentioned herein are the trademarks, service marks, registered trademarks or registered
service marks of their respective owners.
Warranty, Sales, and Service Information
Contact your sales or service representative directly for any help needed. For additional information concerning
warranty, service, repair, spare parts, installation, documentation, or training, use one of the following methods:
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

Important Regulatory Information
B
7915-A2-GB20-20 September 1997
Important Safety Instructions
1. Read and follow all warning notices and instructions marked on the product or included in the manual.
2. Slots and openings in the cabinet are provided for ventilation. To ensure reliable operation of the product and to
protect it from overheating, these slots and openings must not be blocked or covered.
3. Do not allow anything to rest on the power cord and do not locate the product where persons will walk on the
power cord.
4. Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous
high voltage points or other risks. Refer all servicing to qualified service personnel.
5. General purpose cables are provided with this product. Special cables, which may be required by the regulatory
inspection authority for the installation site, are the responsibility of the customer.
6. When installed in the final configuration, the product must comply with the applicable Safety Standards and
regulatory requirements of the country in which it is installed. If necessary, consult with the appropriate regulatory
agencies and inspection authorities to ensure compliance.
7. A rare phenomenon can create a voltage potential between the earth grounds of two or more buildings. If
products installed in separate buildings are interconnected, the voltage potential may cause a hazardous
condition. Consult a qualified electrical consultant to determine whether or not this phenomenon exists and, if
necessary, implement corrective action prior to interconnecting the products.
8. In addition, if the equipment is to be used with telecommunications circuits, take the following precautions:
—Never install telephone wiring during a lightning storm.
—Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
—Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the
network interface.
—Use caution when installing or modifying telephone lines.
—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.

Important Regulatory Information
C 7915-A2-GB20-20
September 1997
EMI Warnings
!WARNING:
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance
with the instruction manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
The authority to operate this equipment is conditioned by the requirements that no modifications will be
made to the equipment unless the changes or modifications are expressly approved by Paradyne
Corporation.
In order to maintain compliance with FCC Part 15 Rules, the ferrite choke must be installed on the DSL
network cable. Refer to the installation instructions.
!WARNING:
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.

i
7915-A2-GB20-20 September 1997
Contents
About This Guide
Document Purpose and Intended Audience v. . . . . . . . . . . . . . . . . . . . . . . . .
Document Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product-Related Documents vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1About HotWire Model 7915 Standalone Termination Units
HotWire 7915 Models and Features 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Configurations 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
User Interface Types 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2Installing the Unit
Overview 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Checklist 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting to the Network and Application Equipment 2-2. . . . . . . . . . . . . . .
Connecting Power to the Unit 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3Using Terminal and Switchpack Modes
Choosing an Interface Mode 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting to a System Terminal 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switching Between Terminal and Switchpack Modes 3-2. . . . . . . . . . . . . . . . .
4Customizing G.703-Compatible Units
Accessing Configuration Options 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Making Changes from the Terminal Interface 4-2. . . . . . . . . . . . . . . . . . . . . . .
Making Changes in Switchpack Mode 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring Framed or Unframed Operation (G.703-to-G.703
Configuration) 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuring a Starting Time Slot
(G.703-to-V.35/V.11 Configuration) 4-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying Switchpack Definitions 4-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents
ii 7915-A2-GB20-20
September 1997
5Customizing V.35/V.11-Compatible Units
Accessing Configuration Options 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Making Changes from the Terminal Interface 5-2. . . . . . . . . . . . . . . . . . . . . . .
Making Changes in Switchpack Mode 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting V.35 or V.11 Signaling 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displaying Switchpack Definitions 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6Monitoring the Unit
What to Monitor 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Board Status 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Statistics 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Unit Information 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel LEDs 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7Testing
Detecting a Problem 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Understanding Loopback Tests 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Local Loopbacks 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Loopbacks 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting and Ending Loopbacks 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resetting the Unit 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AWorksheets
Overview A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G.703-to-G.703 Configuration A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G.703-to-V.35/V.11 Configuration A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V.35/V.11-to-V.35/V.11 Configuration A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G.703-Compatible Units Configuration Worksheet A-4. . . . . . . . . . . . . . . . . . .
V.35/V.11-Compatible Units Configuration Worksheet A-4. . . . . . . . . . . . . . . .

Contents
iii
7915-A2-GB20-20 September 1997
BCable Pin Assignments
Terminal Connection Cable B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SDSL Connection Cable Pin Assignments B-2. . . . . . . . . . . . . . . . . . . . . . . . . .
DB25-to-V.35 Adapter Cable Pin Assignments B-3. . . . . . . . . . . . . . . . . . . . . .
CSwitchpacks and Jumpers
G.703-Compatible Units C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V.35/V.11-Compatible Units C-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glossary
Index

v
7915-A2-GB20-20 September 1997
About This Guide
Document Purpose and Intended Audience
This guide contains information needed to set up, configure, and operate HotWire
Model 7915-A1 E1 SDSL termination units. It is designed for central office and/or
special service installation technicians or network engineers who have an
understanding of digital subscriber line systems and Symmetric Digital Subscriber
Line (SDSL) transmission systems plus the deployment of such systems in a
telephone company or private network environment.
Document Summary
Section Description
Chapter 1 About HotWire Model 7915 Standalone Termination Units .
Describes the features of each version of the Model 7915
and typical configurations.
Chapter 2
Installing the Unit . Describes how to install the unit and
make connections.
Chapter 3
Using Terminal and Switchpack Modes. Provides
instructions for connecting a VT100-compatible terminal
user interface, and describes how to make manual
configuration changes directly on the board hardware.
Chapter 4
Customizing G.703-Compatible Units . Provides instructions
for modifying configuration options by using the terminal
interface or DIP switches and jumpers on the board.
Chapter 5
Customizing V.35/V.11-Compatible Units . Provides
instructions for modifying configuration options by using the
terminal interface or DIP switches and jumpers on the
board.
Chapter 6
Monitoring the Unit. Describes how to monitor unit status,
LEDs, and network statistics. Also describes how to monitor
the status of the unit on the opposite side of the SDSL
connection.

About This Guide
vi 7915-A2-GB20-20
September 1997
Section Description
Chapter 7 Testing . Provides information about available loopback
tests.
Appendix A
Worksheets. Contains all the configuration options, default
settings, and possible settings to use for planning.
Appendix B
Cable Pin Assignments. Contains connector and interface
details.
Appendix C
Switchpacks and Jumpers. Defines the switchpack and
jumper positions on the board hardware. Includes board
layout diagram.
Glossary Defines acronyms and terms used in this document.
Index Lists key terms, acronyms, concepts, and sections in
alphabetical order.
Product-Related Documents
Document Number Document Title
7900-A2-GB20 HotWire Model 7900 Basic Maintenance Processor
User’s Guide
7900-A2-GB21 HotWire Model 7900 SNMP Maintenance Processor
User’s Guide
7900-A2-GN10 HotWire Model 7900 10-Slot Standalone Shelf
Installation Instructions
7900-A2-GN20 HotWire Model 7900 Nest and Options Installation
Guide
7920-A2-GB20 HotWire Models 7924 and 7925 T1 & E1 HDSL Nest
Cards Termination Units User’s Guide
To order additional product documentation, refer to Warranty, Sales, and Service
Information
on page A at the beginning of this User’s Guide.

1-1
7915-A2-GB20-20 September 1997
About HotWire Model 7915
Standalone Termination Units 1
HotWire 7915 Models and Features
Products in the HotWire 7915 family provide “last mile/last kilometer” transport of
E1-compatible circuits between customer facilities and central site equipment
over 2-wire copper lines. The units can be used over distances substantially
exceeding traditional E1 spans and ETSI loop standards.
HotWire 7915 includes these standard features:
V.35/V.11 or G.703 interface
Meets the requirements of repeaterless E1 transmission on loops exceeding
standard specifications
Tolerates bridged tap
Provides local and remote alarm surveillance and performance monitoring
HotWire 7915 may be ordered either as a standalone unit (7915-A1-xxx) or as a
nest-mounted card (7915-B1-xxx) that fits in a HotWire 7900 nest. This guide
describes the installation and maintenance procedures for the standalone
version, Model 7915-A1-xxx.
Up to ten standalone units may be installed in an optional HotWire 7900 10-Slot
Standalone Shelf. This is a convenient way to stack standalone units, and lets
you use a single power source.
To order additional HotWire product documentation, refer to
Product-Related
Documents
on page vi in About This Guide .

Chapter:ChapName
1-2 7915-A2-GB20-20
September 1997
There are several versions of the Model 7915-A1, each supporting a different
interface (G.703 75-Ohm, G.703 120-Ohm, or V.35/V.11) and power supply
(220 Vac, 120 Vac, or –48 Vdc):
Model Number Features
7915-A1-201 2Mb/s G.703 compatible (75-Ohm interface).
Connection to 120 Vac power supply.
7915-A1-202 2Mb/s V.35/V.11 compatible.
Connection to 120 Vac power supply.
7915-A1-211 2Mb/s G.703 compatible (120-Ohm interface).
Connection to 120 Vac power supply.
7915-A1-301 2Mb/s G.703 compatible (75-Ohm interface).
Connection to 230 Vac power supply.
7915-A1-302 2Mb/s V.35/V.11 compatible.
Connection to 230 Vac power supply.
7915-A1-311 2Mb/s G.703 compatible (120-Ohm interface).
Connection to 230 Vac power supply.
7915-A1-501 2Mb/s G.703 compatible (75-Ohm interface).
Direct connection to –48 Vdc power supply.
For use in a HotWire 7900 10-Slot Standalone Shelf only.
7915-A1-502 2Mb/s V.35/V.11 compatible.
Direct connection to –48 Vdc power supply.
For use in a HotWire 7900 10-Slot Standalone Shelf only.
7915-A1-511 2Mb/s G.703 compatible (120-Ohm interface).
Direct connection to –48 Vdc power supply.
For use in a HotWire 7900 10-Slot Standalone Shelf only.

AboutHotWireModel7915StandaloneTerminationUnits
1-3
7915-A2-GB20-20 September 1997
Typical Configurations
HotWire Model 7915 standalone units can be used in campus applications where
long loop distances normally require the campus to contract with the local
telephone exchange carrier to deliver private line services across the campus.
Figure 1-1 shows a typical campus application where remote multiplexers or
routers are interconnected across a campus using two HotWire Model 7915
standalone units. One unit is configured as a central site or central office unit
(CO) and the other is the customer premises (remote) unit (CP).
Each HotWire Model 7915 standalone unit is configured at the factory to operate
at the CP side of an E1 SDSL connection. However, you can easily reconfigure a
unit for use at the CO end, as would be necessary for the configuration in
Figure 1-1. (Conversely, HotWire Model 7915 nest cards are preconfigured for
CO operation.)
A V.35-compatible unit on the CO side may be set for internal or external timing.
A V.35-compatible unit on the CP side uses the SDSL local loop for a timing
source.
Multiplexer
G.703 Unit
G.703
Multiplexer
G.703
Cross-campus
2-wire facility
Customer Premises Central Site
97-15535
G.703 Unit
Router
V.35 Unit
V.35
LAN
Customer Premises
Router
V.35 Unit
V.35
LAN
Central Site
Cross-campus
2-wire facility
97-15534
Figure 1-1. Campus Network Application

About HotWire Model 7915 Standalone Termination Units
1-4 7915-A2-GB20-20
September 1997
HotWire Model 7915 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 7900 Nest containing
HotWire Model 7915 nest cards. Each nest card terminates a single subscriber
line in the CO. Each line is then converted to a G.703 interface for connection to
other central office equipment, such as a digital cross-connect system (DCS).
PBX
G.703 Unit
Router
G.703
DCS
Management
Station
7900 Nest
Nest
Cards
V.35 Unit
V.35
Multiplexer
G.703 Unit
G.703
Telco 2-wire
facilities to
customer premise
Customer Premises
Central Site
97-15533
Figure 1-2. E1 Extension to Customer Premises

AboutHotWireModel7915StandaloneTerminationUnits
1-5
7915-A2-GB20-20 September 1997
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 7915 products provide an alternative to standard repeatered E1
services. Figure 1-3 depicts a typical cellular network access application.
Switch
Management
Station
7900 Nest
Nest
Cards
Telco 2-wire
facilities between
Cell Sites
and MTSO
Customer Premises
Central Site
G.703
G.703 Unit
G.703
G.703 Unit
G.703
Cell Site
Cell Site
Mobile Telephone
Switching Office
97-15536
Figure 1-3. Cellular Network Access
User Interface Types
There are three types of user interfaces to the standalone units:
VT100-compatible terminal interface (Terminal Mode, see Chapter 3)
Manual setting of switches and jumpers (Switchpack Mode, see Chapter 3)
Front Panel LED status indicators (see Chapter 6)

2-1
7915-A2-GB20-20 September 1997
Installing the Unit 2
Overview
This chapter describes the procedure for installing a single standalone
termination unit using a 120 Vac or 230 Vac power supply (Model 7915-A1-20x or
7915-A1-30x).
If you have multiple standalone units at the same location, you may want to
consider installing the units in a HotWire Model 7900 10-Slot Standalone Shelf.
The Standalone Shelf is a convenient method for housing up to ten standalone
termination units and uses only a single power source.
HotWire Model 7915-A1-50x units (which use –48 Vdc direct power) must be
installed in a HotWire 7900 10-Slot Standalone Shelf. Installation instructions for
these models are not provided in this User’s Guide. To obtain information on the
Standalone Shelf, refer to
Product-Related Documents on page vi in About This
Guide
.
Package Checklist
Verify that your package contains the following:
A HotWire Model 7915-A1 standalone unit
VT100-compatible Terminal Cable
A 14′twisted pair network cable
(
V.35-compatible units only: includes a ferrite bead for RFI suppression)
Power cord with power transformer (optional)
Warranty card

Installing the Unit
2-2 7915-A2-GB20-20
September 1997
Connecting to the Network and Application
Equipment
DSL RCV XMT
75Ω
E1/2048KB/S
48 VDC
97-15529
G.703-Compatible (75-Ohm Interface) HotWire 7915 – Rear Panel
DSL E1/2048 Kb/S
48 VDC
120 OHM
97-15704
G.703-Compatible (120-Ohm Interface) HotWire 7915 – Rear Panel
DSL 48 VDC V.35 / V.11
97-15530
V.35/V.11-Compatible HotWire 7915 – Rear Panel

Installing the Unit
2-3
7915-A2-GB20-20 September 1997
Procedure
1. Connect one end of the supplied 14′twisted-pair network cable into the rear
panel DSL jack. Connect the other end to your SDSL network interface.
NOTE:
Do not use a flat VF network cable, as this may severely degrade the
performance of the termination unit. Use only twisted-pair network cable.
2.
V.35/V.11-compatible units only: Clamp the supplied ferrite bead around the
network cable as close as possible to the rear panel DSL jack. The ferrite
bead suppresses RF interference and is required to meet compliance
standards.
3.
V.35/V.11-compatible units only: Use either a DB25-to-V.35 adapter cable or
a cable with a DB25 connector (see
DB25-to-V.35 Adapter Cable Pin
Assignments
in Appendix B for pin assignments), depending on whether you
need a DB25 or V.35 (34-pin) connector.
Connect the other end to your V.35/V.11 equipment.
4.
G.703-compatible units only: Connect a G.703 interface cable into the
appropriate 75-Ohm RCV and XMT connectors or 120-Ohm connector on the
rear panel. Connect the other end to your G.703 equipment.
Connecting Power to the Unit
As described in Chapter 1, there are several options for power cords, depending
on your power source (120 Vac, 230 Vac, or –48 Vdc).
Your package may also include a country-specific adapter. To obtain information
on the various power cord adapters available, refer to
Warranty, Sales, and
Service Information
on page A at the beginning of this User’s Guide.
Plug the power transformer into an available 115 or 230 Vac power outlet, running
the power lead to the unit housing. Connect the power lead into the –48 Vdc plug
on the rear panel.

3-1
7915-A2-GB20-20 September 1997
Using Terminal and Switchpack
Modes 3
Choosing an Interface Mode
You can make configuration changes either through the system terminal menus
(Terminal Mode) or by manually changing switches and jumpers on the board
(Switchpack Mode). Terminal Mode is the default setting.
In Terminal Mode:
You change configuration parameters by selecting menu options that appear
on a VT100-compatible terminal attached to the front panel of the termination
unit.
The standalone unit is preconfigured at the factory for CP (customer
premises) operation.
In Switchpack Mode:
You change configuration parameters by moving switchpacks and jumpers on
the board.
The standalone unit is not preconfigured. You must ensure that the
switchpack is set for your desired configuration options.
You can still display information about the unit and run loopback tests from
the terminal.
Any changes you had made in Terminal Mode are lost when you change to
Switchpack Mode.
Connecting to a System Terminal
An optional system maintenance terminal may be attached to your Model 7915
standalone termination unit through the modular jack on the front panel. This
terminal is required if you want to use Terminal Mode (described above). You may
have terminals attached to both endpoints.
The system terminal must be a VT100-compatible terminal or emulation software
on a PC.

Using Terminal and Switchpack Modes
3-2 7915-A2-GB20-20
September 1997
Connect the 9-pin end of the terminal cable into a COM port on your PC. Plug the
other end into the modular jack on the front panel. If your PC requires a 25-pin
connector to the COM port, see Appendix B,
Cable Pin Assignments , for the
correct cable pinouts.
Make sure the terminal parameters on your PC are set to:
H9600 baud
H8 bit
Hno parity
H1 stop bit
Hno flow control
Press Return from your VT100-compatible terminal window to activate the main
menu for the attached unit. The system runs diagnostics and checks status as it
comes up. After a few moments the Main Menu screen appears on your
VT100-compatible terminal. Menus are described in Chapters 4 and 5for the
G.703 and V.35 units, respectively.
Switching Between Terminal and Switchpack Modes
Use the following procedure to change the operating mode of the unit to either
Terminal Mode (the default setting) or Switchpack Mode. Refer to Chapter 4 (for
G.703-compatible units) or Chapter 5 (for V.35/V.11-compatible units) for
information on changing configuration options using either of these modes.
"Procedure
To change the mode:
1. Power down the unit and remove the enclosure cover, exposing the circuit
board. Use electrostatic discharge (ESD) protection when handling the circuit
board.
2. See Appendix C,
Switchpacks and Jumpers , to locate switchpack S4 on your
unit’s board.
3. Place switch 8 in the correct position for the desired mode.
— Switchpack Mode is enabled by moving switch 8 to the ON position.
— Terminal Mode is enabled by moving switch 8 to the OFF position.
4.
If you are enabling Switchpack Mode : You must set the switchpack and
jumpers to your desired configuration. Refer to Appendix C,
Switchpacks and
Jumpers
.
If you are enabling Terminal Mode : The configuration options you had in
Switchpack Mode are carried over into Terminal Mode.
5. Power up the board to reset and enable the new configuration.