ADC PG-PLUS PLL-724 User manual

PG-PLUS
TECHNICAL PRACTICE
SECTION SCP-PLL724-010-04H
Model List CLEI Code
PLL-724 1S9L1AE0A~~
1 POTS/1 ISDN
CENTRAL OFFICE LINE UNIT
LIST
SYNC
MARGIN
BYPASS
FAULT
POTS
ISDN
PWR
PLL 724
PG-PLUS

SCP-PLL724-010-04H
January 6, 2003 PLL-724 List 1
Revision History of This Practice
©Copyright 2003 ADC DSL Systems, Inc. All Rights Reserved.
ADC is a registered trademark of ADC Telecommunications, Inc. PG-Plus is a registered trademark of ADC DSL Systems, Inc. No
right, license, or interest to such trademarks is granted hereunder, and you agree that you shall assert no such right, license, or
interest with respect to such trademarks. Other product names mentioned in this document are used for identification purposes only
and may be trademarks or registered trademarks of their respective companies.
Information contained in this document is company private to ADC DSL Systems, Inc., and shall not be modified, used, copied,
reproduced or disclosed in whole or in part without the written consent of ADC.
Contents herein are current as of the date of publication. ADC reserves the right to change specifications at any time without notice.
Information furnished by ADC is believed to be accurate and reliable. In no event shall ADC be liable for any damages resulting
from the loss of data, loss of use, or loss of profits and ADC further disclaims any and all liability for indirect, incidental, special,
consequential or other similar damages. This disclaimer of liability applies to all products, publications and services during and
after the warranty period.
Revision Release Date Revisions Made
01 August 28, 1997 Initial Release
02 February 26, 1999 Metric values and V2 compliancy for voltage safety added to specifications table
03 January 25, 2002 Release to rebrand document to comply with ADC standards
04 January 6, 2003 Updated Product Support Information

SCP-PLL724-010-04H Using This Practice
PLL-724 List 1 January 6, 2003
USING THIS PRACTICE
Three types of messages, identified by icons, appear in the text.
INSPECTING YOUR SHIPMENT
Upon receipt of the equipment:
•Unpack each container and visually inspect the contents for signs of damage. If the equipment has been
damaged in transit, immediately report the extent of damage to the transportation company and to ADC.
Order replacement equipment, if necessary.
•Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short
or irregular, contact ADC as described in “Returns” on page 41. If you must store the equipment for a
prolonged period, store the equipment in its original container.
Notes indicate information about special circumstances.
Cautions indicate the possibility of equipment damage or the possibility of personal injury.
Electrostatic Discharge (ESD) susceptibility symbols indicate that a device or assembly is
susceptible to damage from electrostatic discharge.You must wear an antistatic wrist strap
connected to the appropriate ground connection prior to performing installation procedures.
You must also observe normal ESD precautions when handling electronic equipment. Do not
hold electronic plugs by their edges. Do not touch components or circuitry.

Inspecting Your Shipment SCP-PLL724-010-04H
January 6, 2003 PLL-724 List 1

SCP-PLL724-010-04H
PLL-724 List 1 January 6, 2003 i
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Description and Features....................................................................................................................1
Metallic Fallback................................................................................................................................1
Specifications .....................................................................................................................................2
Power Consumption and Heat Dissipation ........................................................................................3
Maximum Heat Dissipation.................................................................................................3
Thermal Loading Limitations..............................................................................................4
Maximum Power Consumption...........................................................................................4
Maximum Current Drain .....................................................................................................4
Monitoring, History and Diagnostics.................................................................................................4
Performance Parameters ......................................................................................................4
Alarm Names and Values ....................................................................................................5
History .................................................................................................................................5
LED Descriptions...............................................................................................................................6
Installation and Test___________________________________________________________________ 8
Required Tools and Test Equipment..................................................................................................8
Installing the COLU...........................................................................................................................8
Initialization Sequence.......................................................................................................................8
Subscriber Drop Tests........................................................................................................................9
Administration _______________________________________________________________________ 9
Logging On ......................................................................................................................................10
Logging Off......................................................................................................................................10
PAU or PMU Main Submenu ..........................................................................................................10
COLU Main Menu ...........................................................................................................................12
Navigational Methods........................................................................................................13
Menu Bar Selections..........................................................................................................13
COLU Summary Screen....................................................................................................14
Performance Submenu .....................................................................................................................15
HDSL Summary Screen ....................................................................................................16
HDSL 24-Hour History Screen .........................................................................................17
HDSL 7-day History Screen..............................................................................................18
ISDN1 Summary Screen ...................................................................................................19
ISDN 7-Hour History Screen ............................................................................................20
Alarms Submenu..............................................................................................................................20
HDSL History Screen........................................................................................................21
ISDN History Screen .........................................................................................................22

SCP-PLL724-010-04H
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Configuration Submenu................................................................................................................... 23
System Options Screen ..................................................................................................... 24
System Alarm Types Screen ............................................................................................. 25
HDSL Alarm Thresholds Screen ...................................................................................... 26
HDSL Alarm Types Screen .............................................................................................. 27
ISDN Options Screen........................................................................................................ 29
ISDN Alarm Thresholds Screen ....................................................................................... 30
ISDN Alarm Types Screen ............................................................................................... 31
Save Configuration Screen................................................................................................ 32
Set Factory Defaults Screen.............................................................................................. 33
Test Submenu .................................................................................................................................. 34
Information Submenu...................................................................................................................... 36
Inventory Screen ............................................................................................................... 36
Help Screen ....................................................................................................................... 37
Fault Isolation _______________________________________________________________________ 38
COLU and RT Fault Indicators ....................................................................................................... 38
Subscriber Reported Faults.............................................................................................................. 39
Product Support _____________________________________________________________________ 41
Technical Support............................................................................................................................ 41
Limited Warranty ............................................................................................................................ 41
Returns............................................................................................................................................. 41
FCC Class A Compliance................................................................................................................ 43
Modifications................................................................................................................................... 43
Acronyms___________________________________________________________________________ 44

SCP-PLL724-010-04H
PLL-724 List 1 January 6, 2003 iii
LIST OF FIGURES
1. Typical System Application ............................................................................................................................1
2. COLU Front Panel LEDs ................................................................................................................................6

SCP-PLL724-010-04H
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SCP-PLL724-010-04H
PLL-724 List 1 January 6, 2003 v
LIST OF TABLES
1. Power Consumption and Heat Dissipation......................................................................................................3
2. LED Descriptions ............................................................................................................................................7
3. Menu Bar Selections.......................................................................................................................................13
4. System Status.................................................................................................................................................14
5. HDSL Alarms Screen ....................................................................................................................................21
6. System Options Configuration Fields ...........................................................................................................24
7. System Alarms...............................................................................................................................................25
8. HDSL Alarm Thresholds...............................................................................................................................26
9. Alarm Reports ...............................................................................................................................................27
10. HDSL Alarms................................................................................................................................................28
11. ISDN Alarms .................................................................................................................................................32

SCP-PLL724-010-04H
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SCP-PLL724-010-04H Description and Features
PLL-724 List 1 January 6, 2003 1
OVERVIEW
This practice describes the ADC®PG-Plus®1 POTS/1 ISDN COLU, PLL-724 List 1, a COLU that provides
interfaces for one POTS and one ISDN interface between a PG-Plus RT and subscribers.
DESCRIPTION AND FEATURES
A ADC application, consisting of one COTS, one COLU and one RT, (see Figure 1) provides bidirectional
transport of multiple DS0, over a single, unconditioned wire pair using HDSL technology. Using existing cable,
PG-Plus provides for higher bandwidth needs of residential and business customers by providing multiple POTS
interfaces on a single HDSL twisted-pair wire.
Figure 1. Typical System Application
The COLU uses ADC's HDSL technology to provide digital transmission rate without the need for repeaters, loop
conditioning, or pair selection. The COLU is an ideal solution to ISDN and POTS deployment over a limited cable
plant. The COLU can be installed in the PCS-718 19-inch or the PCS-719 23-inch COTS. The COLU operates in
the standalone mode with no other COTS circuit cards required. Advanced features such as performance
monitoring, alarm reporting, and testing requires the addition of the PAU. Line power is provided to the RT by
the COLU.
The COLU performs the interface functions between the analog POTS circuits of the CO switching system by
mapping one POTS lines onto one DS0 for transmission to the RT on the HDSL pair. The COLU performs the
interface functions between the ISDN circuits of the CO switching system and the internal digital PCM bus. The
COLU maps one ISDN line onto three DS0 for transmission to the RT on the HDSL pair. To obtain maximum
reach, the HDSL line to the RT is operated at the minimum rate to support the payload.
METALLIC FALLBACK
Metallic fallback provides a direct connection from the CO to one subscriber under fault conditions. Service is
provided to the subscriber assigned to the first POTS line in the affected system. At the RT, the system exits
metallic fallback and attempts to synchronize if either POTS or the HDSL Tip to Ring pair is shorted for at least
3 seconds, and then released for at least 3 seconds. Otherwise, the COLU checks for the presence of an RT every
5 minutes. If an RT is present, the system begins HDSL synchronization acquisition.
Relays in the COLU and RT provide a path for SDT and metallic fallback operation. These relays are used to
establish a circuit to POTS # 1 during fault conditions and to provide for drop testing of the selected subscriber
line from the CO location.
PG-Plus COT Shelf PG-Plus RT
HDSL Pair
Other RTs
Alarm relays
Remote ACO
Dumb
Terminal
ISDN
POTS
C
O
L
U

Specifications SCP-PLL724-010-04H
2 January 6, 2003 PLL-724 List 1
SPECIFICATIONS
Power Supply
Voltage Safety A2 compliant per GR-1089-CORE
Input Voltage -42 Vdc to -56 Vdc
HDSL Line
Output Voltage + 140 Vdc maximum
Output Power 27 W maximum
HDSL Line Code 2B1Q
HDSL Line Rate 130.6 K symbols/sec; 261.3 K bps
HDSL Reach 15.0 kft (4.75 km), 26 AWG; 21.7 kft (6.61 km), 24 AWG; 31.2 kft (9.51 km), 22
AWG; 49.7 kft (15.1 km), 19 AWG
Maximum Attenuation 45.9 dB at 65 kHz
POTS
Analog Impedance 900 Ω
DC On-hook Resistance 4 M Ωminimum
DC Off-hook Resistance 1000 Ωmaximum
COTS Input Impedance 0.9 REN @ 20 Hz maximum
COTS Ring Detection 65 Vrms minimum @ 15 to 50 Hz
ISDN U Interface
Input Impedance 135 Ω
Resistive Signature Tip to Ground 162 K; Ring to Ground 453 K; Tip to Ring 120 K
Performance Monitoring Interim Path Performance
Provisional Sealing Current 9 mA minimum at RT
Provisional EOC Multipoint EOC, transparent
Environment
Operating Temperature -40° F to +150° F; -40° C to +65° C
Operating Humidity 5 percent to 95 percent noncondensing
Altitude -200 ft. to 13,000 ft.; -60m to 4,000m
Vibration NEBS
ESD Per GR-1089-CORE
Power and Lightning Per GR-1089-CORE
Human Safety UL 1950 for Restricted Access
Emissions Radiation and Immunity Per GR-1089-CORE for class A equipment
Connector 50 gold-plated card edge fingers
Dimensions
Height 5.5 in. (14.0 cm.)
Width 1.1 in. (2.8 cm.)
Depth 10.25 in. (26.0 cm.)
Weight 1.0 lbs. (0.5 kg.)

SCP-PLL724-010-04H Power Consumption and Heat Dissipation
PLL-724 List 1 January 6, 2003 3
POWER CONSUMPTION AND HEAT DISSIPATION
The three most important power demands of an COLU on the COTS power supply are its maximum power
consumption, its maximum heat dissipation, and its maximum current drain. Table 1 lists the power consumption
and heat dissipation for the COLU on a per slot and per COTS basis.
.
Maximum Heat Dissipation
The maximum heat dissipation measures the power that is converted into heat built up within the COLU. It
contributes to the total heat generated in the space around the COLU. This measurement is used to determine the
maximum number of fully loaded COTS per bay so as not to exceed the maximum allowable power dissipation
density in Watts per square foot.
In CO locations, the maximum heat dissipation for open faced, natural convection-cooled mountings is limited to
134.7 W per square foot per Section 4.1.4 of the NEBS standard GR-63-CORE. The footprint of a standard
16-slot, 23-inch COTS is 7.042 square foot. The maximum bay dissipation is therefore limited to 948.6 W. At
64.0 W per COTS, this limits the number of fully loaded COTS to fourteen per bay with a heat baffle above each
COTS.
ADC recommends that the number of COTS per bay be limited to six, to allow the flexibility to deploy the widest
range of PG-Plus services from each COTS.
The worst case conditions under which these parameters are measured include a 15,000 ft., 26 AWG loop,
a fully loaded COTS, and a -42.5 Vdc COTS battery voltage. The remote is assumed to be ringing one line
with a load of 5 REN, with one line off hook. Loop current sink at the COTS is assumed to be 23 mA. Higher
loop current feed than 23 mA restricts the number of COTS in a bay due to heating.
Table 1. Power Consumption and Heat Dissipation
Power COLU
Slot
COTS
19-inch 23-inch
Maximum Heat Dissipation
HDSL Line Power Off 2.8 W 33.6 W 44.8 W
HDSL Line Power On 4.0 W 48.0 W 64.0 W
Maximum Power Consumption
HDSL Line Power Off 2.8 W 33.6 W 44.8 W
HDSL Line Power On 8.43 W 101.1 W 134.8 W
Maximum Current Drain
HDSL Line Power Off 0.06 A 0.791 A 1.054 A
HDSL Line Power On 0.198 A 2.380 A 3.174 A
This is a worst case situation in that it assumes the entire CO is subjected to the maximum power density.
Conditions other than worst case would permit increasing the number of COTS per bay without
jeopardizing the CO thermal integrity. Due to the chimney effect, ADC recommends you install one
heat-dissipating baffle between every COTS. This action would prevent exceeding the rated operating
temperature of the COLU units.

Monitoring, History and Diagnostics SCP-PLL724-010-04H
4 January 6, 2003 PLL-724 List 1
Thermal Loading Limitations
Thermal loading limitations imposed when using the COLU in a CEV or other enclosures are determined by
applying the COLU power parameters to the manufacturer's requirements for each specific housing.
Maximum Power Consumption
Maximum power consumption is the total power that the COLU consumes or draws from its -48 Vdc COTS power
source. This parameter is needed when the COLU is located remotely from its serving CO. It determines the
battery capacity required to maintain an eight-hour standby battery reserve for emergency situations. This limits
the maximum number of line units in a remote enclosure.
Maximum Current Drain
Maximum current drain is the maximum current drawn from the COTS power supply when it is at its minimum
voltage (-42.5 Vdc). This determines the COTS fusing requirements.
MONITORING, HISTORY AND DIAGNOSTICS
COLUs provide extensive real-time, non-disruptive monitoring of HDSL transmission performance parameters
for all units in a circuit. PG-Plus allows user-selectable threshold settings for performance monitoring
measurements. This allows alarms to be activated at the designated threshold setting. Performance of the user
interface ports is also monitored. Monitored parameters include the following:
•HDSL Noise margin, pulse attenuation, ES, UAS
•Interface ES, SES, UAS, BPV seconds
•Major Alarm Relay Form-C relay contacts (NO, NC, C). Fail-safe operation
•Loopbacks Local interface loopback, local HDSL loopback, remote loopback
•Test Jacks Bridge jack on the front panel
Performance Parameters
Based on the monitored parameters, the COLUs derive the following performance parameters:
•MAR - A measure of the ratio of signal power to noise power, in dB, at a receiver point. A value of 0 dB
means that the predicted transmission BER is equal to 10-7, a value of 6 dB means the predicted transmission
BER is equal to 10-10. The Main menu status display of the console continuously updates the margin value.
HDSL CRC-6: A six-bit word in every HDSL frame, representing a calculation based on all the bits in that
frame. Any mismatch at the receiver, between the received CRC-6 and the one calculated, based on the
received data in the frame, indicates that one or more bits were received in error. The units use this parameter
to derive the HDSL ES performance parameter.
•LOSW - The COLU has detected an error in one or more bits in six consecutive HDSL SYNC words. Two
consecutive SYNC words must be received without error to clear this condition. A LOSW condition generally
indicates the loop is down, thus data cannot be transmitted. The COLU use this parameter to derive UAS
performance parameter.
•ES - An interval of 1 second during which at least one error is detected at the incoming HDSL port or there
is an LOSW condition.
•HDSL UAS - An interval of 1 second during which a loop is down.

SCP-PLL724-010-04H Monitoring, History and Diagnostics
PLL-724 List 1 January 6, 2003 5
Alarm Names and Values
The COLUs generate alarms for problem conditions on the HDSL transmission facility and at the application
interface. From the “HDSL Alarm Thresholds Screen” on page 26, you can set the alarms to the values of Critical,
Major, Minor, Not Alarmed, and Not Reported. You can view the status of the following alarms from the “HDSL
Summary Screen” on page 16.
•MAR
•UAS
•ES
•LOSW
•PFO
•PFS
•PGF
•MISMATCH
•NORLUSW
•MISPWRA
•MISPWRB
History
Current cumulative counts of the past twenty-four hours and historical data in the form of 24-hour history and a
7-day history are available to assist you in identifying problem sources. You can view the HDSL history from the
“ISDN History Screen” on page 22.

LED Descriptions SCP-PLL724-010-04H
6 January 6, 2003 PLL-724 List 1
LED DESCRIPTIONS
Table 2 describes the COLU front-panel LEDs in which nequals the POTS line. For further details on the LEDs
activities, refer to “Initialization Sequence” on page 8 and the “COLU and RT Fault Indicators” on page 38.
Figure 2. COLU Front Panel LEDs
LIST
SYNC
MARGIN
BYPASS
FAULT
POTS
ISDN
PWR
PLL 724
PG-PLUS
Status LEDs
Retaining Latc
h

SCP-PLL724-010-04H LED Descriptions
PLL-724 List 1 January 6, 2003 7
Table 2. LED Descriptions
LEDs Mode Description
PWR On COLU is powered and the dc power provided to the HDSL pair is normal.
Flashing One battery feed is missing or a battery feed fuse on the COLU is blown.
and FAULT Flashing DC power provided to the HDSL pair is out of normal range.
On, other LEDs flashing at 1 Hz Running in Boot Mode due to invalid Application Program
On, POTS On, other LEDs running
downward at 1 Hz
Active software download of the COLU
On, POTS On, other LEDs running
upward at 1 Hz
Active software download of the RT connected to the COLU
SYNC On HDSL is in synchronization between COLU and RT.
Flashing COLU and RT are attempting to SYNC.
MARGIN On COLU HDSL margin is equal to or below the threshold value.
Flashing RT HDSL margin is equal to or below the threshold value.
BYPASS On COLU is in fallback to metallic.
and POTS Flashing SDT is occurring on POTS.
and ISDN Flashing SDT is occurring on ISDN or loopback is active on ISDN.
FAULT On COLU has a fault.
Flashing Alarm condition exists on the COLU.
ISDN On Channel is active and ready for layer 2 communication.
POTS On Channel is off-hook.
Flashing with Ring Cadence Channel is ringing.

Required Tools and Test Equipment SCP-PLL724-010-04H
8 January 6, 2003 PLL-724 List 1
INSTALLATION AND TEST
REQUIRED TOOLS AND TEST EQUIPMENT
No tools are required to install the COLU. For testing, the following tools may be utilized:
•Telephone test set
•ISDN Basic Rate test set
•Optional, PSU-795, COTS Continuity Test Card, 150-1695-01 List 1
INSTALLING THE COLU
You can install the COLU in any slot except the three positions labeled COMMON, MUX 1, and MUX 2. Refer
to the cabling tables provided in the COTS documentation for slot and Telco cabling assignment.
1Open the retaining latch on the front of the COLU.
2Insert the COLU into the card guides in a vacant slot in the COTS that corresponds to the location of the
wiring from the CO switch.
3Engage the retaining latch to hold the card in place.
All alarms in the PG-Plus application are suppressed when initially installed and powered up. Any alarms that are
generated during this process are Suppressed. When the HDSL is synchronized and the COLU and RT margin has
cleared; outstanding Suppressed alarms are made Active and reported to the PAU or the PMU, based upon their
provisioned types.
INITIALIZATION SEQUENCE
When the COLU is correctly seated in the COTS, the following events occur in the order listed below:
•All LEDs briefly blink On and then Off, with the exception of the PWR and FAULT LEDs that remain
Flashing.
•After about 5 seconds, the COLU applies power and goes into Start-Up mode. If an RT is present and no PFSs
or PFOs are detected, the PWR LED is On green. If the line is Offhook, the HDSL power is not applied until
it goes Onhook for at least 3 seconds. There is a 5 second delay before turning on the HDSL power.
•After applying the HDSL power, the tests for overload or underload conditions are performed. If the HDSL
line power is normal, the PWR LED is On and HDSL start-up is initiated.
•As the COLU continues with start-up mode, the SYNC LED Flashes, indicating the HDSL line is attempting
to acquire synchronization. When synchronization is complete, the SYNC LED is On. It takes approximately
10 to 15 seconds from the system power-up until the HDSL power is normal. If the first HDSL
synchronization attempt fails, the system is powered down and put into the Metallic Fallback state. After a
5minute period, HDSL power is applied again and a second attempt is made to acquire HDSL
synchronization. If the second attempt fails, the system goes into Metallic Fallback state.
•The MARGIN LED is On yellow indicating the COLU signal-to-noise ratio is equal or below the selected
signal-to-noise ratio threshold on the COLU. The MARGIN LED Flashes if the signal-to-noise ratio of the
HDSL line is equal or below the selected signal-to-noise ratio threshold on the RT.

SCP-PLL724-010-04H Subscriber Drop Tests
PLL-724 List 1 January 6, 2003 9
SUBSCRIBER DROP TESTS
You can perform this function in one of two ways:
•Initiate a test by applying a test voltage on the Tip at the COLU through an MLT set
•With the VT-100 Terminal connected to the PAU or PMU maintenance port, select the Subscriber Drop Test
feature from the Test menu. Relays on the RT provide a path for performing a SDT. The results are reported
to the PAU or the PMU and presented as TA-909 resistive signatures.
ADMINISTRATION
Performance monitoring is built into PG-Plus application. You can access the VT-100 port of the PAU or the PMU
to review performance measurements that provide an indication of the quality of transmission to the subscriber.
You can perform system administration functions, such as alarm checking and clearing, configuration changes,
performance monitoring, and testing for the COLU through the screens.
Connect a VT-100 terminal to the RS-232 interface on the front panel of either the PAU or the PMU to access the
COLU screens. If the system does not respond, verify the following values are present:
•VT-100 terminal Hardware Flow Control is set to On
•XON/XOFF is enabled
•ASYNC parameters: Data = 8, Parity = None, Start/Stop = 1.
For further information on connecting a terminal and accessing the screens refer to the PAU or the PMU Technical
Practice.
CONVENTIONS USED IN THIS DOCUMENT
Some screen shots in this document come from a prototype setup and may appear slightly different from what you
see on your Craft interface screen. The basic information and contents should be similar. This document uses the
following conventions for menus and shortcuts:
The factory defaults given in this document are standard factory defaults. You may have a customized
version of the product, in which case, refer to the PG-Plus Customized Factory Defaults for the values
appropriate to the product version you have.
Example Describes
menu name of menu item
submenu name of submenu item
prompts the place where you answer yes or no or type some other response
error the name of what’s wrong
error text an explanation of what’s wrong
nnnn a variable, such as POTS unit 1 in a 6 POTS unit

Logging On SCP-PLL724-010-04H
10 January 6, 2003 PLL-724 List 1
LOGGING ON
1Press the several times to activate the Autobaud feature. Supported baud rates are 1200, 2400,
4800, 9600, and 38400. The Logon Password screen displays.
2Type the default password and press to view the PAU or PMU Main Menu bar.
LOGGING OFF
If you must leave your VT-100 terminal unattended, it is good practice to log out until you are ready to resume
work. This prevents unauthorized persons from inadvertently changing any of your operating parameters. Log out
by choosing Logout from the PAU Main menu bar or by disconnecting the cable connecting the console to the
PAU/PMU.
PAU OR PMU MAIN SUBMENU
The first screen displays with the COTS Main menu bar. The screens are identified by the COTS slot number at
the top of each screen. The provisionable System ID string displays at the bottom center, the date displays at the
lower left of the screen, and the time in military format displays at the lower right of the screen.
password#1 is the factory-default password. If you establish a different password, you must type the new
password at a subsequent log on. Passwords are not case sensitive. The password must use at least 6 and
no more than 10 characters, and the new password MUST contain at least 1 alpha, 1 numeric, and 1 special
character. If the system does not respond, verify that the Hardware Flow Control of the VT-100 terminal
is set to On.
SPACEBAR
PG-PLUS Login Screen
Enter Password: ____________
Access Key: 062790011146
ENTER