PairGain UTU-722 User manual

PAIRGAIN GLOBAL ACCESS
HIGAIN-ETSI RS
RATE SELECTABLE HDSL UNITS
QUICK INSTALLATION GUIDE
PAIRGAIN TECHNOLOGIES, INC.
ENGINEERING SERVICES
SECTION 700-722-900-02
Model List Number Part Number
UTU-722
ETU-772 1 1150-1422-22 150-1432-22

700-722-900-02, Revision 02
ii June 21, 1999 UTU-722 and ETU-772 List 1
Revision History of This Guide
©Copyright 1999 PairGain Technologies, Inc.
PairGain and HiGain are registered trademarks and HiGain-ETSI is a trademark of
PairGain Technologies, Inc.
Information containedin thisdocumentis company private to PairGainTechnologies, Inc.,
and shall not be modified, used, copied, reproduced or disclosed in whole or in part without
the written consent of PairGain.
Other product names mentioned in this practice are used for identification purposes only
and may be trademarks or registered trademarks of their respective companies.
Revision Release Date Revisions Made
01 March 23, 1999 Initial release
02 June 21, 1999 Added pinouts for ETU-772 HDSL line and console
port connectors.

700-722-900-02, Revision 02 Using This Guide
UTU-722 and ETU-772 List 1 June 21, 1999 iii
USING THIS GUIDE
Three types of messages, identified by icons, appear in the text.
DOCUMENTATION
The complete technical practice for the units described in this guide,
HiGain-ETSI RS Rate Selectable HDSL Line and Desktop Units, section
700-722-100-xx, can be downloaded from the Customer Site portion of the
PairGain Web page at www.pairgain.com. A password is required. If you do
not have a password, contact your PairGain sales representative.
If you have comments on this PairGain document, send an email to
technical_publicatio[email protected]. Type the product name and the
section number of the document in the subject area of the email message.
Notes contain information about special circumstances.
Cautions indicate the possibility of equipment damage or the
possibility of personal injury.
Warnungszeichen deuten darauf hin, dass Schaden am Gerät
oder eine mögliche Körperverletzung riskiert wird, falls die
Warnungen nicht beachtet werden.
The ESD Susceptibility symbol indicates that a device or
assembly is susceptible to damage from electrostatic
discharge.

700-722-900-02, Revision 02
iv June 21, 1999 UTU-722 and ETU-772 List 1

700-722-900-02, Revision 02 Table of Contents
UTU-722 and ETU-772 List 1 June 21, 1999 v
TABLE OF CONTENTS
Overview _______________________________________________ 1
Rate Selectable HDSL ............................................................. 1
UTU-722 Line Unit.................................................................. 1
ETU-772 Desktop Unit............................................................ 2
Transmission Ranges ............................................................... 2
Compatibility ........................................................................... 3
Shelves and Enclosures for UTU-722.......................3
Connector Adapters for ETU-772 .............................3
Front Panels ............................................................................. 4
ETU-772 Rear Panel................................................................ 7
Installation _____________________________________________ 8
Inspection................................................................................. 8
Safety ....................................................................................... 8
Line Unit Installation............................................................... 9
Desktop Unit Installation......................................................... 9
HDSL Startup and Synchronization....................................... 11
System Configuration ___________________________________ 12
Maintenance Terminal Connection........................................ 12
Logging On............................................................................ 13
Navigating Menus.................................................................. 14
System Settings...................................................................... 15
LTU and NTU Interface Settings...........................................16

Table of Contents 700-722-900-02, Revision 02
vi June 21, 1999 UTU-722 and ETU-772 List 1
Viewing Status __________________________________________17
Main Console Screen..............................................................17
Monitor Screens .....................................................................19
Monitor LTU and NTU Interface Screens...............19
Monitor HDSL Span Screen....................................20
PairGain Regional Sales Offices ___________________________21
Documentation _________________________________________22
Technical Support _______________________________________22
Equipment Repair _______________________________________23
Warranty ______________________________________________23
Compliance ____________________________________________24

700-722-900-02, Revision 02 Overview
UTU-722 and ETU-772 List 1 June 21, 1999 1
OVERVIEW
ThisguidecontainsinstallationinformationforthePairGain®HiGain-ETSI™
UTU-722 List 1 and ETU-772 List 1 Rate Selectable (RS) line and desktop
units.
RATE SELECTABLE HDSL
HiGain-ETSI RS is a single pair High-bit-rate Digital Subscriber Line
(HDSL) solution that offers extended reach capabilities through the use of
industry-leading multi-rate DSL technology. The UTU-722 and ETU-772
deployHDSLinnetworksusinga singlepairofcopperwirerunningat speeds
between 64 kbps and 256 kbps. The HDSL line rates are either menu selected
in time slot increments of 64 kbps or derived automatically from the Terminal
Transmission (TT) clock received at the Nx64k serial data port from the
Network Data Terminal Equipment (DTE). Transmission ranges vary
according to the rate selected. Depending on noise environment, ranges of up
to 8.5 km (5.3 miles) are possible at the lowest-selectable HDSL line rates
(64 and 128 kbps).
UTU-722 LINE UNIT
The UTU-722 can be configured as a Line Termination Unit (LTU) or
Network Termination Unit (NTU). The default configuration is NTU.
When configured as an LTU, the UTU-722 serves as the Exchange Office
side of a repeaterless, HDSL transmission system. The LTU-configured unit
connects to an NTU-configured unit (UTU-722 or ETU-772) over one
twisted-pair of copper wire, completing the HDSL transmission system.
The UTU-722 has an Nx64k serial data interface with user-selectable
protocols that include V.35, V.36, X.21, and RS-530 (RS-449). The
UTU-722 accepts the DTE payload at its Nx64k serial data port and
transports the data to the remote unit at the selected HDSL rate. TheUTU-722
requires -36 to -72 Vdc from a local power supply or an enclosure’s
AC-to-DC power supply; it does not supply power to other HDSL units.
HiGain-ETSI RS units are not backward compatible with
standard HDSL or management unit firmware. The installed
firmware must be that designed for rate selectable units.
HiGain-ETSI RS units must have the same payload rates
available. An LTU set for a rate of 768 kbps will not function
with an NTU whose maximum available rate is 256 kbps.

Overview 700-722-900-02, Revision 02
2 June 21, 1999 UTU-722 and ETU-772 List 1
ETU-772 DESKTOP UNIT
The ETU-772 is housed in a plastic enclosure with interface and power
connectors for use as an integrated desktop unit. All functions of the
ETU-772, with exception of power requirements, are identical to the
UTU-722. The ETU-772 requires a source of 100 to 240 volt, 50 or 60 Hz,
AC power.
TRANSMISSION RANGES
Transmission ranges assume the presence of noise according to the ETSI
modeldescribedin TS101135.TheexpectedBitError Rate(BER)underthis
model is 10-7. The transmission ranges in such a noise environment at the
variousHDSL line rates over one twisted-pair of 0.4 mm and 0.51 mm copper
wire are listed below.
‘
Transmission Ranges with ETSI Noise
Wire Size and Transmission Range (with ETSI Noise)
HDSL Line
Rate (kbps) (a)
0.4 mm (26 AWG)
Single Twisted-Pair
Copper Wire
0.51 mm (24 AWG)
Single Twisted-Pair
Copper Wire
128 5.0 km (16,404 ft.) 6.3 km (20,669 ft.) (b)
256 4.1 km (13,451 ft.) 5.1 km (16,732 ft.)
(a) A selected HDSL line rate of 64 kbps is transmitted at 128 kbps.
(b) The maximum no-noise transmission range is approximately 8.5 km.

700-722-900-02, Revision 02 Overview
UTU-722 and ETU-772 List 1 June 21, 1999 3
COMPATIBILITY
The UTU-722 and ETU-772 are compatible with the following PairGain
HiGain-ETSI products.
Shelves and Enclosures for UTU-722
•EMS-830 Exchange Office Management Shelf, rear connector access
(part number 150-1400-01).
•EMS-831 Exchange Office Management Shelf, front connector access
(part number 150-1401-01).
•EMS-832 Exchange Office Management Shelf, front connector access
(part number 150-1402-01).
•ERE-810 Single-Slot Remote Enclosure.
(part number 150-1410-01).
•ERE-811 Single-Slot Remote Enclosure with internal AC power supply
(part number 150-1411-01).
•ERE-821 Dual-Slot Remote Enclosure with internal AC power supply
(part number 150-1416-01).
•ERE-826 Single-Slot Remote Enclosure
(part number 150-1412-01).
Connector Adapters for ETU-772
•ECA-800 D25M to M34F connector adapter for V.35
(part number 150-1470-01).
•ECA-801 D25M to D15F connector adapter for X.21
(part number 150-1471-01).
•ECA-802 DB9M to RJ-45 connector adapter for HDSL
(part number 150-1472-01).
•ECA-804 DB9M to 4-position terminal block connector for HDSL
(part number 150-1474-01).
•ECA-807 DB25M to DB37F connector adapter for RS-449
(part number 150-1477-01).

Overview 700-722-900-02, Revision 02
4 June 21, 1999 UTU-722 and ETU-772 List 1
FRONT PANELS
The components on the UTU-722 and ETU-772 front panels are shown
below. Their functions are described on page 5 and page 6.

700-722-900-02, Revision 02 Overview
UTU-722 and ETU-772 List 1 June 21, 1999 5
UTU and ETU Front Panel Components
Item Function
HDSL SYNC LED Displays synchronization state for the HDSL loop.
HDSL ALM LED Displays alarm state for the HDSL loop.
I/F ALM LED Displays the Nx64k interface (I/F) alarm state.
LOC LPBK LED Displays local (LOC) loopback state.
LOC LPBK Button Activates the local HDSL analog loopback.
REM LPBK LED Displays remote (REM) loopback state.
REM LPBK Button Activates the remote interface loopback.
V.24 (RS-232) console
port
Provides bi-directional communication between the unit and
an external maintenance terminal through a V.24 (RS-232C)
interface to allow configuration and performance monitoring
through the Console screen menus.
Bar code label (all units) Contains the serial number and part number of the unit, as
indicated in both bar code and text format. Also contains the
configuration number of the unit, as indicated by "CFG: Rnn,"
where nn is the configuration number. For example, CFG: R07
would indicate configuration number 07.
Warranty control
number label (UTU-722)
Indicates the beginning year and month of the line card
warranty. Also indicates the line card revision number. For
example, warranty control number "803R07" would indicate a
warranty beginning in the year 1998 (8), during the month of
March (03), and line card revision number R07.
Unit ID label (ETU-772) Identifies the model number, manufacturer, part number, and
input voltage range of the ETU. Includes the CE Mark,
certifying that the unit is in compliance with European
Telecommunications Terminal Equipment (TTE) directives
89/336/EEC and 93/68/EEC.

Overview 700-722-900-02, Revision 02
6 June 21, 1999 UTU-722 and ETU-772 List 1
UTU and ETU Front Panel LED Indications
LED Mode Description
HDSL SYNC LED Steady green
Slow flashing
Off
HDSL loop is ready to transmit and
receive data across all spans.
HDSL loop acquisition is in progress for
local span.
HDSL loop is not configured.
HDSL ALM LED Steady red
Pulsing red
Off
Indicates:
•Loss of sync word (LOSW)
•Margin is below the set margin alarm
threshold
•Errored Seconds (ES) count is above
threshold on any span.
Pulses for every ES on any span.
Normal transmit or receive data is in
progress.
I/F ALM LED Steady red Loss of Clock (LOC) alarm due to loss of
TT clock (Nx64k timing) or external clock
(EXT timing).
For information on loopback testing and loopback LED
indications, see the
HiGain-ETSI RS Rate Selectable HDSL
Line and Desktop Units
technical practice, section
700-722-100-xx. See “Documentation” on page iii for
information on how to obtain this practice.

700-722-900-02, Revision 02 Overview
UTU-722 and ETU-772 List 1 June 21, 1999 7
ETU-772 REAR PANEL
The components on the ETU-772 rear panel are shown and described below.
ETU-772 Desktop Unit Rear Panel
ETU-772 Rear Panel Components
Item Description
D25F data port connector Connects Nx64k data circuits to the enclosure.
D9F HDSL line connector Connects the HDSL pairs to the enclosure.
Power cord receptacle Connects an AC power cord to the enclosure.
On/Off switch Rocker switch that allows you to turn the externally applied
AC power on or off.

Installation 700-722-900-02, Revision 02
8 June 21, 1999 UTU-722 and ETU-772 List 1
INSTALLATION
This section contains instructions for installation of the UTU-722 line unit
and the ETU-772 desktop unit.
INSPECTION
Before installing the line or desktop unit, inspect it for signs of shipping
damage. Ifthe unit has been damaged intransit, immediately report theextent
of the damage to the transportation company and to PairGain Technologies.
SAFETY
To ensure your safety when servicing and installing this equipment, please
take the following precautions:
Be careful when installing or modifying telephone lines.
Dangerous voltages can be present. It is unsafe to install
telephone wiring during a lightning storm.
Always disconnect all telephone lines and power connections
before servicing or disassembling this equipment. For
performance and safety reasons, only power supplies listed
for use with telephone equipment by a locally recognized
organization should be used with PairGain equipment. All
wiring external to the product should follow the local wiring
codes.
Walte Vorsicht beim Installieren oder Ändern von
Telefonlinien. Gefährliche Spannungen könnten anliegen. Es
ist nicht sicher während eines Gewitters Telefondräte zu
installieren.
Bevor Wartung oder Auseinandernehmen des Gerätes
müssen immer alle Telefon- und Netzkabel ausgezogen
werden. Aus Leistungs- und Sicherheitsgründen sollten nur
Netzteile die für Telefongeräte zugeschnitten und von einem
renommierten Geschäft vertrieben werden mit PairGain
Geräten verwendet werden. Alle externen
Verdrahtungsarbeiten sollten nach den hiesigen
Elektrizitätsvorschriften ausgeführt werden.

700-722-900-02, Revision 02 Installation
UTU-722 and ETU-772 List 1 June 21, 1999 9
LINE UNIT INSTALLATION
To install the UTU-722 line unit into a shelf or remote enclosure:
1Install the line unit into the appropriate slot (1 through 16) of a shelf or
into a single- or dual-slot remote enclosure. (See “Compatibility” on
page 3.)
2Connect the power source as instructed in the technical practice for the
shelf or remote enclosure in which the line unit is installed.
3If configuring the line unit as an LTU, power up the shelf and proceed as
instructed on pages 12 through 15 to access the Local Unit Role option
in the Config System Settings menu (the default setting is NTU).
4Connect the data port and HDSL line cabling as instructed in the
technical practice for the shelf or remote enclosure in which the line unit
is installed.
5Set the DTE interface (TT clock) for the default HDSL payload rate of
256 kbps (4 time slots).
DESKTOP UNIT INSTALLATION
To install an ETU-772 desktop unit:
1Insert the ACpower cord intothe power cord receptacle onthe ETU rear
panel.
2Plug the power cord into a source of 100 to 240 volt, 50 or 60 Hz
AC power.
3If configuringthe desktop unit as an LTU, power up the unit and proceed
as instructed on pages 12through 15 to access the Local Unit Role option
in the Config System Settings menu (the default setting is NTU).
The chassis ground of the shelf or remote enclosure
receiving these units must be connected to earth ground for
protection of the equipment and for safety of personnel.
Other protection is required when the network side of the
equipment is extended to an outside facility.

Installation 700-722-900-02, Revision 02
10 June 21, 1999 UTU-722 and ETU-772 List 1
4Connect the data port cable from the DTE to the data port connector on
the ETU-772 rear panel.
5Connect the HDSL line cable to the HDSL line connector on the ETU
rear panel. The pinouts for the HDSL line connector are listed in the
following table.
6Set the DTE interface (TT clock) for the default HDSL payload rate of
256 kbps (4 time slots).
HDSL Line Connector (DB9F) Pinouts
Pin* Signal Description
4HDSL_RING_A HDSL Ring Loop 1
9HDSL_TIP_A HDSL Tip Loop 1
1HDSL_RING_B HDSL Ring Loop 2
6HDSL_TIP_B HDSL Tip Loop 2
* No other pins are used.

700-722-900-02, Revision 02 Installation
UTU-722 and ETU-772 List 1 June 21, 1999 11
HDSL STARTUP AND SYNCHRONIZATION
At startup, a HiGain-ETSI RS LTU confirms that it is communicating with a
HiGain-ETSI RS NTU. The LTU then synchronizes the NTU configuration
with its own configuration.
Power up the LTU and NTU. The followingsynchronization sequence should
occur:
1Power up the shelf or enclosure where the unit(s) are installed.
2Confirm the following:
•The HDSL ALM LED is onand the HDSL SYNC LED flashes once
per second as the units self-configureand establish synchronization.
•After approximately 60 seconds the HDSL ALM LED is off and the
HDSL SYNC LED is a steady green. The units are now ready for
configuration through the console screen menus.
If the HDSL SYNC LED continues to flash after 90 seconds,
the HDSL line is faulty, the Local Unit Role is not configured
as LTU, or one of the units isnot a rate selectable unit. Check
for the correct line units and Local Unit Role. Test the HDSL
line using the loopbacks described in technical practice
700-722-100-xx.
The LTU and NTU will reset and their LEDs will sequence
through the startup cycle following any change to the HDSL
Payload Rate option (see “System Settings” on page 15).

System Configuration 700-722-900-02, Revision 02
12 June 21, 1999 UTU-722 and ETU-772 List 1
SYSTEM CONFIGURATION
After synchronizationis established, theHDSL system can be configured and
performance can be monitored from thelocal unit. If the HDSL link is down,
the only parameters that can be changed are those on the local unit. The LTU
also provides a special lockout feature that prevents users plugged into the
NTUconsoleport fromchangingthecircuitconfiguration.Whenenabled, the
maintenance terminal connected to an NTU provides a read-only view of the
entire HDSL system.
MAINTENANCE TERMINAL CONNECTION
A maintenance terminal is used to access the line unit Console screen menus.
Throughthese menus, the HDSL system is configured, monitored, tested, and
its circuit inventory is displayed.
To connect a maintenance terminal:
1Connectastandardserial cable fromthemaintenanceterminalCOMport
to the lineunit’s frontpanel console port. The pinouts for the console port
and maintenance terminal connectors are shown in the diagram on the
following page.
2Configure the maintenance terminal for the following communication
settings:
•VT100 Emulation or ANSI (if VT100 is not available)
•clear the modem initialization string if supported by the terminal
•Bits per second: 1200, 2400, 4800, 9600 (default), or 19200 bps
(recommended)
•Data bits: 8
•Parity: None
•Stop bits: 1
•Flow Control: None
The Console screen menus are not available when the HDSL
line unit is under the control of a shelf management unit.

700-722-900-02, Revision 02 System Configuration
UTU-722 and ETU-772 List 1 June 21, 1999 13
UTU/ETU Console Port and Maintenance Terminal Connector Pinouts
LOGGING ON
To log on to the maintenance terminal Console screen:
1Press the several times to activate the autobaud feature and
to display the Logon Password screen.
2Type the password at the prompt or press if a password has not
been established. The Console screen menu bar displays.
The key is the factory default password. If you
establish a different password, you must type the new
password (single word, no spaces, up to eight characters) on
a subsequent log on. If the system does not respond, verify
that the Hardware Flow Control of the maintenance terminal
is set to NONE
.
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System Configuration 700-722-900-02, Revision 02
14 June 21, 1999 UTU-722 and ETU-772 List 1
NAVIGATING MENUS
Use the keys described in the following table to navigate the Console screen
and its menus.
Console Screen Navigation Keys
These Keys Perform this Function
Alpha-numeric
keys
Type the underlined or highlighted letter to select and execute a menu
item. For example on the Console screen menu bar, type to access
the Config drop-down menu.
Also use these keys to enter values in text fields. For example, on the
Config Date and Time menu, type the date in a DD/MM/YY format.
and keys Press the key to access a Console screen drop-down menu. For
example, press the key on Config to access the Config drop-down
menu. Or press the and keys to highlight a sub-menu item, then
press to select the item. For example, press the key to
highlight Config Alarms, then press to view the sub-menu.
key Provides same function as the key.
and keys Moves horizontally across the Menu bar, except when in a text entry
field.
++ moves up one line in the History screens.
++ moves down one line in the History screens.
++ performs the page-down function in the History screens.
++ performs the page-up function in the History screens.
Selects options displayed for current menu item. For example, to select
MANUAL or Nx64k AUTO mode from the Config System Settings
menu:
• press the key to highlight the HDSL Rate Mode option, then
• press the until the desired option (MANUAL or Nx64k
AUTO) is highlighted.
Exits the current screen and returns to the previous screen. Selection
changes made on the current screen are discarded. Press while
in a text field to cancel the text entry and restore the old value.
Applies all selections on the current screen. For example, to select an
HDSL payload rate from the Config System Settings menu:
• press the key to highlight the HDSL Payload Rate option, then
• type the desired number of time slots (1 to 4) and press to
display the selected HDSL payload rate (in MANUAL mode only).
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