RAD Data comm Network Card ARC 101 User Guide

ARC-101  
ATM Rate and Media Converter  
Installation and Operation Manual  
Notice  
This manual contains information that is proprietary to RAD Data Communications. No part of this  
publication may be reproduced in any form whatsoever without prior written approval by RAD Data  
Communications.  
No representation or warranties for fitness for any purpose other than what is specifically mentioned in  
this manual is made either by RAD Data Communications or its agents.  
For further information contact RAD Data Communications at the address below or contact your local  
distributor.  
RAD data communications  
Headquarters  
RAD data communications  
US East  
RAD data communications  
US West  
12 Hanechoshet Street  
Tel Aviv 69710 Israel  
Tel: 972-3-6458181  
Fax: 972-3-6498250  
E-mail: rad@ rad.co.il  
900 Corporate Drive  
Mahwah, NJ 07430 USA  
Tel: (201) 529-1100  
Fax: (201) 529-5777  
3631 South Harbor Boulevard  
Suite 250  
Santa Ana, CA 92704  
Tel: (714) 850-0555  
Fax: (714) 850-1555  
© 1999 RAD Data Communications  
Publication No. 334-200-03/99  
 
Warranty  
This RAD product is warranted against defects in material and workmanship for a period of one year  
from date of shipment. During the warranty period, RAD will, at its option, either repair or replace  
products which prove to be defective. For warranty service or repair, this product must be returned to  
a service facility designated by RAD. Buyer shall prepay shipping charges to RAD and RAD shall pay  
shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties  
and taxes for products returned to RAD from another country.  
Limitation of Warranty  
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance  
by Buyer, Buyer-supplied firmware or interfacing, unauthorized modification or misuse, operation  
outside of the environmental specifications for the product, or improper site preparation or  
maintenance.  
Exclusive Remedies  
The remedies provided herein are the Buyer’s sole and exclusive remedies. RAD shall not be liable for  
any direct, indirect special, incidental, or consequential damages, whether based on contract, tort, or  
any legal theory.  
 
Safety Warnings  
The exclamation point within a triangle is intended to warn the operator or  
service personnel of operation and maintenance factors relating to the  
product and its operating environment which could pose a safety hazard.  
Always observe standard safety precautions during installation, operation and maintenance of this  
product. Only a qualified and authorized service personnel should carry out adjustment, maintenance  
or repairs to this instrument. No adjustment, maintenance or repairs should be performed by either the  
operator or the user.  
Telecommunication Safety  
The safety status of each of the ports on the ARC-101 is declared according to EN 41003 and is  
detailed in the table below:  
Safety Status  
Ports  
SELV*  
ATM, VTP/155, CX/BBC/155, T3, E3  
E1  
TNV**  
operating within limits of SELV  
* SELV = Safety Extra-Low Voltage  
** TNV = Telecommunications Network Voltage  
 
Regulatory Information  
FCC-15 User Information  
This equipment has been tested and found to comply with the limits of the 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 the 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.  
Warning per EN 55022  
This is Class A product. In a domestic environment, this product may cause radio interference, in  
which case the user may be required to take adequate measures.  
 
Declaration of Conformity  
Manufacturer’s Name:  
RAD Data Communications Ltd.  
Manufacturer’s Address:  
12 Hanechoshet St.  
Tel Aviv 69710  
Israel  
declares that the product:  
Product Name:  
ARC-101  
Conforms to the following standard(s) or other normative document(s):  
EMC:  
EN 55022 (1994)  
Limits and methods of measurement of radio disturbance  
characteristics of information technology equipment.  
EN 50082-1 (1992)  
Electromagnetic compatibility - Generic immunity standards  
for residential, commercial and light industry.  
Safety:  
EN 60950 (1992/93) Safety of information technology equipment, including  
electrical business equipment.  
Supplementary Information:  
The product herewith complies with the requirements of the EMC Directive 89/336/EEC and the Low  
Voltage Directive 73/23/EEC. The product was tested in a typical configuration.  
Tel Aviv, January 23rd, 1997  
Haim Karshen  
VP Quality  
European Contact: RAD Data Communications GmbH, Lyoner Strasse 14, 60528 Frankfurt am Main, Germany  
 
Contents  
CHAPTER 1 – INTRODUCTION  
1.1 General Description..........................................................................................................................1-1  
1.2 ARC-101 Features..............................................................................................................................1-2  
Interfaces Supported.............................................................................................................................1-2  
Rate Adaptation....................................................................................................................................1-2  
Easy Migration ......................................................................................................................................1-2  
User Management and Monitoring.......................................................................................................1-2  
Indicators..............................................................................................................................................1-2  
Compatibility........................................................................................................................................1-2  
Traffic Management..............................................................................................................................1-3  
Loopback Mode....................................................................................................................................1-3  
1.3 Specifications ....................................................................................................................................1-4  
Data Rate..............................................................................................................................................1-4  
Indicators..............................................................................................................................................1-4  
Control Port..........................................................................................................................................1-4  
Power...................................................................................................................................................1-4  
Physical ................................................................................................................................................1-4  
Environment .........................................................................................................................................1-4  
Ordering...............................................................................................................................................1-5  
CHAPTER 2 – INSTALLATION  
2.1 General .............................................................................................................................................2-1  
2.2 Unpacking.........................................................................................................................................2-1  
2.3 Site Requirements.............................................................................................................................2-2  
Power...................................................................................................................................................2-2  
Front and Rear Panel Clearance ............................................................................................................2-2  
Ambient Requirements..........................................................................................................................2-2  
2.4 Rack Mounting Instructions................................................................................................. .............2-2  
Installation of a Single Unit...................................................................................................................2-2  
Installation of Two Units........................................................................................................................2-3  
2.5 Cable Connections............................................................................................................................2-3  
ATM Connection ..................................................................................................................................2-3  
Control Port Connection .......................................................................................................................2-3  
AC Power Connection...........................................................................................................................2-5  
Grounding ............................................................................................................................................2-5  
2.6 ARC-101 Modules .............................................................................................................................2-6  
Module Characteristics..........................................................................................................................2-6  
Inserting and Removing Modules.........................................................................................................2-11  
ARC-101 Installation and Operation Manual  
i
 
Contents  
Jumper Settings for E1 and E1/LTU......................................................................................................2-12  
Jumper Settings for T3.........................................................................................................................2-13  
CHAPTER 3 – OPERATION  
3.1 Operating Procedure ........................................................................................................................3-2  
Turning on the ARC-101......................................................................................................................3-2  
Normal Operation ................................................................................................................................3-2  
Turning off the ARC-101.......................................................................................................................3-2  
Procedure in Case of Malfunctioning....................................................................................................3-2  
CHAPTER 4 – SOFTWARE MANAGEMENT  
4.1 Introduction ......................................................................................................................................4-1  
4.2 Accessing, Using and Exiting Monitor Mode.....................................................................................4-1  
4.3 Screen Explanations ..........................................................................................................................4-2  
4.4 General Information Window...........................................................................................................4-2  
4.5 Configuration Window......................................................................................................................4-2  
System Parameters................................................................................................................................4-3  
Right/Left Module Configuration............................................................................................................4-4  
ASCII Terminal Configuration................................................................................................................4-5  
4.6 Diagnostics Window .........................................................................................................................4-6  
General Reset .......................................................................................................................................4-6  
Modules Reset and Self-Test..................................................................................................................4-6  
Last Self-Test Results .............................................................................................................................4-6  
4.7 Performance Monitoring Window.....................................................................................................4-6  
Link Status ............................................................................................................................................4-7  
ATM Traffic Monitoring.......................................................................................................................4-10  
ii  
ARC-101 Installation and Operation Manual  
 
List of Figures  
Figure 1-1 ARC-101 Rate Conversion Application .........................................................................1-1  
Figure 2-1 Installation of a Single Unit..........................................................................................2-2  
Figure 2-2 Installation of Two Units..............................................................................................2-3  
Figure 2-3 ARC-101 Front Panel...................................................................................................2-3  
Figure 2-4 Jumper Settings for DTE (Two upper pins connected) ...................................................2-4  
Figure 2-5 Jumper Settings for DCE (Two lower pins connected) ...................................................2-4  
Figure 2-6 ARC-101 Rear Panel (AC Version) ................................................................................2-5  
Figure 2-7 ARC-101 Rear Panel (DC Version)................................................................................2-5  
Figure 2-8 SC13M/155 Module Front Panel ..................................................................................2-6  
Figure 2-9 ST13S/155 Module Front Panel....................................................................................2-6  
Figure 2-10 ST13L/155 Module Front Panel..................................................................................2-7  
Figure 2-11 CX/BNC/155 Module Front Panel...............................................................................2-7  
Figure 2-12 UTP/155 Module Front Panel.....................................................................................2-8  
Figure 2-13 E3 Module Front Panel...............................................................................................2-9  
Figure 2-14 T3 Module Front Panel...............................................................................................2-9  
Figure 2-15 E1 Module Front Panel............................................................................................. 2-10  
Figure 2-16 E1 and E1/LTU Jumper Locations..............................................................................2-12  
Figure 2-17 T3 Jumper Locations.................................................................................................2-13  
Figure 3-1 ARC-101 Front Panel....................................................................................................3-1  
Figure 3-2 ARC-101 Block Diagram...............................................................................................3-3  
ARC-101 Installation and Operation Manual  
iii  
 
List of Tables  
List of Tables  
Table 1-1 Optical Module Characteristics....................................................................................... 1-5  
Table 1-2 Electrical Module Characteristics .................................................................................... 1-5  
Table 3-1 ARC-101 LED Indicators.................................................................................................3-1  
iv  
ARC-101 Installation and Operation Manual  
 
Chapter 1  
Introduction  
1.1 General Description  
The ARC-101, ATM Rate & Media Converter, provides transparent ATM rate  
and media conversion between two interfaces by extracting ATM cells from  
one interface at one rate and sending them over a different interface at a  
different rate.  
The ARC-101 supports a wide variety of ATM data rates and media types.  
These include: E1, E3, T3 and STS-3c/STM-1, over optical and electrical  
interfaces.  
The ARC-101 is supplied as a standalone unit. Special hardware for  
mounting the unit in a 19" rack can be ordered separately.  
A typical ARC-101 rate conversion application is shown in Figure 1-1.  
Figure 1-1 ARC-101 Rate Conversion Application  
ARC-101 Features  
1-1  
 
Chapter 1. Introduction  
ARC-101 Installation & Operation Manual  
1.2 ARC-101 Features  
This section provides a brief description of the ARC-101's main features.  
The ARC-101 supports a wide variety of ATM data rates and media types,  
both electrical and optical.  
Interfaces  
Supported  
The electrical interfaces supported are:  
2 Mbps E1 over Coax/UTP  
34 Mbps E3 over Coax  
45 Mbps T3 over Coax  
155 Mbps STS-3c/STM-1 over Coax  
155 Mbps STS-3c/STM-1 over Cat-5 UTP  
The optical interfaces supported are: Multimode, Single Mode LEDs and  
LASERs and 155 Mbps STM-1/STS-3c.  
Multiple connector types are available for both electrical and optical  
interfaces.  
A large internal FIFO is used for rate adaptation between the two interfaces  
and for handling the bursty nature of the ATM traffic. Special circuitry is  
responsible for closing the ATM flow control loop, according to Available  
Bit Rate (ABR) traffic management specifications, in order to avoid FIFO  
overflow.  
Rate Adaptation  
Easy Migration  
The modular software-based design of the ARC-101 enables easy migration  
to new ATM physical interfaces.  
Built-in diagnostics, configuration and statistics are provided via an ASCII  
terminal connected to the RS-232 CONTROL port.  
User  
Management  
and Monitoring  
LED indicators provide information on ARC-101 general status (power and  
self-test), as well as left and right link status (ATM activity and link  
synchronization).  
Indicators  
The ARC-101 complies with ATM Forum specifications.  
Compatibility  
1-2  
ARC-101 Features  
 
ARC-101 Installation & Operation Manual  
Chapter 1. Introduction  
ATM cells are transferred from one interface to the other through an  
internal bus, the bandwidth of which is 180 Mbps.  
Traffic  
Management  
Cells that are received with a multiple-bit HEC error are dropped.  
Cells received at the slower interface are transferred directly to the other  
interface.  
Cells received at the faster interface are transferred through the FIFO  
which absorbs temporary bursts of ATM cells and transfers them  
according to the other interface data rate.  
The FIFO depth is 6K cells in SONET/SDH interfaces and 3K cells in other  
interfaces.  
The ARC-101 implements a single priority queue FIFO. Special circuitry is  
responsible for the traffic management and for avoiding FIFO overflow.  
The total bandwidth of CBR cells cannot exceed the slow interface  
bandwidth.  
The total bandwidth of VBR cells can only temporarily exceed the slow  
interface data rate. If this bandwidth is exceeded, cells are queued in  
FIFO and are transferred according to the slow interface data rate.  
The ARC-101 has a configurable congestion threshold (limit) used to  
handle UBR/ABR traffic. You can configure the threshold to be 25%, 50%,  
75%, 90% or 100% of the total FIFO depth.  
In order to control the UBR/ABR traffic bandwidth, you can configure the  
ARC-101 for EFCI marking of cells that are received while the FIFO is  
congested, or configure AAL5 Early Packet Discard mode in which a  
whole frame is dropped in case of congestion, except for the last cell.  
You can configure the ARC-101 to discard cells whose CLP bit is set,  
when FIFO is congested.  
The number of cells from a certain VP/VC is limited to 3/4 of the total  
queue depth, in order to minimize the effects of large bursts of data from  
one VC on the other VCs in the ARC-101.  
The ARC-101 recalculates the HEC field of cells whose EFCI bit was  
changed.  
Each ARC-101 interface can be separately configured for Remote or  
Internal Loopback mode. The Remote Loopback mode enables a loopback  
of the incoming data and clock to the transmit data and clock outputs. The  
Internal Loopback mode enables a loopback of the transmitted data to the  
received data. Remote Loopback is not available in the E1 interface.  
Loopback Mode  
ARC-101 Features  
1-3  
 
Chapter 1. Introduction  
ARC-101 Installation & Operation Manual  
1.3 Specifications  
Up to 155 Mbps  
Data Rate  
PWR  
ON when unit is powered  
Indicators  
FLT  
BLINKS when self-test fails  
(ON during self-test)  
ATM  
SYNC  
ON when ATM cells were transmitted and received in the last second  
and no uncorrected HEC errors were detected.  
ON when the port is synchronized (no alarm)  
OFF during local alarm  
BLINKS during remote alarm reception  
Interface  
RS-232/V.24 at 9600/19200/38400 baud (configurable) with RJ-45  
connector.  
Default - 9600 baud.  
Control Port  
Power  
Voltage  
Frequency  
Power  
90-260 VAC or -48 VDC  
47-63 Hz  
25 Watts  
Height  
4.4 cm / 1.8 in (1U)  
Physical  
Width 21.6 cm / 8.5 in  
Depth 29.8 cm / 11.7 in  
Weight 1.1 kg / 2.8 lb  
Temperature  
Humidity  
0°-45°C/32°-113°F  
Up to 90%, non-condensing  
Environment  
Radiation Suppression Complies with FCC part 15, subpart J, Class A  
Complies with EN55022, Class A  
1-4  
Specifications  
 
ARC-101 Installation & Operation Manual  
Chapter 1. Introduction  
ARC-101/#  
ATM Rate Converter  
Ordering  
# Specify power supply:  
AC for 90-260 VAC  
DC for - 48 VDC  
ARC-M/@  
Interface module for ARC-101  
@ Specify module name - see tables below  
RM-1  
Hardware for mounting one unit in a 19" rack.  
RM-2  
Hardware mounting for two units in a 19" rack.  
Table 1-1 Optical Module Characteristics  
Module  
Name  
Protocols  
Supported (Wavelength)  
Fiber Type  
Connector  
Type  
Dynamic  
Range  
Optical  
Power  
Sensitivity  
(typical)  
SC13M/155  
ST13S/155  
ST13L/155  
STS-3c  
STM-1  
62.5/125  
(1300 nm)  
Duplex SC  
ST (LED)  
16 dB  
16 dB  
16 dB  
-18 dBm  
-18 dBm  
-12 dBm  
-31 dBm  
-31 dBm  
-31 dBm  
STS-3c  
STM-1  
9/125  
(1300 nm)  
STS-3c  
STM-1  
9/125  
(1300 nm)  
ST (LASER)  
Table 1-2 Electrical Module Characteristics  
Module  
Name  
Protocols  
Supported  
Cable  
Type  
Connector Range/Budget  
Type  
Coding  
Method  
Impedance  
(Ohms)  
UTP/155  
STS-3c  
STM-1  
UTP Cat 5  
Shielded  
RJ-45  
100 m  
NRZ  
100  
CX/BNC/155  
STS-3c  
STM-1  
Coax  
BNC  
12.7 dB*  
CMI  
75  
T3  
T3  
E3  
E1  
E1  
Coax  
Coax  
BNC  
BNC  
150 m  
150 m  
12 dB  
12 dB  
B3ZS  
HDB3  
HDB3  
HDB3  
75  
E3  
75  
E1  
Coax (UTP) BNC (RJ-45)  
Coax (UTP) BNC (RJ-45)  
75 (120)  
75 (120)  
E1/LTU  
* At 78 MHZ, according to the square root of the frequency law.  
Specifications  
1-5  
 
Chapter 1. Introduction  
ARC-101 Installation & Operation Manual  
1-6  
Specifications  
 
Chapter 2  
Installation  
This chapter contains mechanical and electrical installation procedures for  
connecting the ARC-101 to the main power supply, as well as cabling the  
ATM links and monitor (control) port.  
2.1 General  
The ARC-101 is delivered completely assembled for bench-top installation.  
The ARC-101 may be optionally installed in a 19" rack (refer to Section 2.4).  
2.2 Unpacking  
Inspect the equipment container before unpacking. Note and report  
evidence of damage immediately.  
Place the container on a clean flat surface. Cut all straps and open, or  
remove top.  
Remove the unit carefully and place it securely on a clean surface.  
Remove all packing material and inspect the unit for damage. Report any  
damage immediately.  
Site Requirements  
2-1  
 
Chapter 2. Installation  
ARC-101 Installation & Operation Manual  
2.3 Site Requirements  
The ARC-101 is powered by 90/260 VAC or -48 VDC.  
Power  
The unit should be installed within 1.5 meters (5 ft.) of an easily accessible  
grounded AC outlet capable of supplying the appropriate voltage  
(90/260 VAC).  
Allow at least 90 cm (36 inches) of clearance at the front of the unit for  
operator access. Allow at least 10 cm (4 inches) clearance at the rear of the  
unit for power cord connection.  
Front and Rear  
Panel Clearance  
The ambient operating temperature of the ARC-101 should be 0°C to 45°C  
(32°F-113°F), at a relative humidity of up to 90% non-condensing.  
Ambient  
Requirements  
2.4 Rack Mounting Instructions  
Rack adapter components for installing a single unit include one short  
bracket and one long bracket. Each bracket is fastened to the side walls of  
the unit by two screws (with flat washers) which are inserted into the two  
front holes on the side wall (the unit is supplied with nuts already in place  
on the inner side wall). Note that the short bracket fastens to the left side of  
the unit, and the long bracket to the right side of the unit (see Figure 2-1).  
Installation of  
a Single Unit  
Once the brackets are fastened to the side walls, the unit is ready for  
installation in the 19" rack. Place the unit in the rack, and fasten the  
brackets to the side rails of the rack by means of the two screws situated on  
each side (not included in the kit).  
Figure 2-1 Installation of a Single Unit  
2-2  
Rack Mounting Instructions  
 
ARC-101 Installation & Operation Manual  
Chapter 2. Installation  
Rack adapter components for installing two units include two short side  
brackets (for rack mounting) and two flat rails (for fastening the two units  
together)  
Installation of  
Two Units  
Figure 2-2 Installation of Two Units  
To install two units follow these instructions:  
1. Place two units side by side. On the top of each unit are four grooves.  
The grooves should line up when the units are placed side by side.  
2. Place a flat rail on each of the groves in the center of the two units.  
3. Fasten the brackets to the units using the 8 screws provided.  
4. Place the assembled units in the rack, and fasten the brackets to the side  
rails of the rack, by means of the two screws situated on each side, as  
shown in Figure 2.2 (not included in the kit).  
2.5 Cable Connections  
The ARC-101 has several connectors on its front panel (see Figure 2-3) for  
ATM connection and connection to an ASCII terminal, and a power  
connector on its rear panel.  
Figure 2-3 ARC-101 Front Panel  
ATM Connection  
Connect the appropriate cables to the connectors in both modules.  
The CONTROL port connector is an RS-232/V.24 RJ-45 connector for an  
ASCII terminal (9600 baud).  
Control Port  
Connection  
Cable Connections  
2-3  
 
Chapter 2. Installation  
ARC-101 Installation & Operation Manual  
When the ARC-101 is used as a DCE or as a DTE, the RJ-45 pinout is:  
Pinout  
Pin 1  
Pin 2  
Pin 3  
Pin 4  
Pin 5  
Pin 6  
Pin 7  
Pin 8  
Pin 9  
DCE  
DTE  
DTR  
GND  
GND  
TX Data  
RX Data  
RX Data  
TX Data  
CTS  
RTS  
Changing  
Control Port Mode  
The ARC-101 is shipped as a DCE. To connect the ARC-101 to a MODEM,  
the control port mode must be configured to DTE.  
To change the control port mode from DCE to DTE, or vice versa:  
1. Turn the unit OFF (disconnect the power cord).  
2. Unscrew the twelve box cover screws and remove the box cover. The  
12 pin DCE/DTE jumper is located on the left side of the ARC-101  
mother board when viewed from the rear panel (see Figure 3-2).  
3. To change the configuration to:  
DTE, place the 12 pin jumper on the upper 12 pins.  
DCE, place the 12 pin jumper on the lower 12 pins.  
4. Replace the box cover and tighten the screws.  
Figure 2-4 Jumper Settings for DTE  
(Two upper pins connected)  
Figure 2-5 Jumper Settings for DCE  
(Two lower pins connected)  
2-4  
Cable Connections  
 
ARC-101 Installation & Operation Manual  
Chapter 2. Installation  
The ARC-101's power connector is located on its rear panel  
(see Figures 2-6 and Figure 2-7).  
AC Power  
Connection  
AC power should be supplied to the ARC-101 through a 1.5 m (5 ft.)  
standard power cord terminated by a grounded 3-wire plug.  
When applying AC power, first connect the plug of the AC cable to the  
power connector on the rear panel of the ARC-101 and then to the mains  
outlet.  
Warning  
Grounding  
Interrupting the protective (grounding) conductor (inside or outside the  
instrument) or disconnecting the protective earth terminal can make this  
instrument dangerous. Intentional interruption of the grounding  
conductor is prohibited.  
Warning  
Figure 2-6 ARC-101 Rear Panel (AC Version)  
Figure 2-7 ARC-101 Rear Panel (DC Version)  
ARC-101 Modules  
2-5  
 
Chapter 2. Installation  
ARC-101 Installation & Operation Manual  
2.6 ARC-101 Modules  
Module  
Characteristics  
SC13M/155 Module  
Figure 2-8 SC13M/155 Module Front Panel  
Wavelength:  
1300 nm  
Connector:  
SC  
Used with:  
Multimode fiber  
STS-3c, STM-1  
NRZ  
Protocols supported:  
Coding method:  
Optical output into 62.5 micron fiber:  
Receiver sensitivity:  
Maximum input power:  
-18 dBm (typical)  
-31 dBm  
-15 dBm  
ST13S/155 Module  
TX  
RX  
ATM  
SY NC  
ST13S/155  
Figure 2-9 ST13S/155 Module Front Panel  
Wavelength:  
1300 nm  
Connector:  
ST  
Used with:  
Single mode fiber (LED)  
STS-3c, STM-1  
NRZ  
Protocols supported:  
Coding method:  
Optical output into 9 micron fiber:  
Receiver sensitivity:  
Maximum Input Power:  
-18 dBm (typical)  
-31 dBm  
-15 dBm  
2-6  
ARC-101 Modules  
 
ARC-101 Installation & Operation Manual  
Chapter 2. Installation  
ST13L/155 Module  
Figure 2-10 ST13L/155 Module Front Panel  
Wavelength:  
1300 nm  
ST  
Connector:  
Used with:  
Single mode fiber (LASER)  
STS-3c, STM-1  
NRZ  
Protocols supported:  
Coding method:  
Optical output into 9 micron fiber:  
Receiver sensitivity:  
Maximum Input Power:  
-12 dBm (typical)  
-31 dBm  
-15 dBm  
CX/BNC/155 Module  
Figure 2-11 CX/BNC/155 Module Front Panel  
Connector:  
BNC  
Used with:  
Coax cable  
STS-3c, STM-1  
CMI  
Protocols supported:  
Coding method:  
Budget:  
12.7 dB*  
75 Ω  
Impedance:  
Transmit levels:  
1v +/- 0.1v P-P  
*At 78 MHZ, according to the square root of frequency law.  
ARC-101 Modules  
2-7  
 
Chapter 2. Installation  
ARC-101 Installation & Operation Manual  
UTP/155 Module  
Figure 2-12 UTP/155 Module Front Panel  
Connector:  
Shielded RJ-45  
UTP Cat 5  
STS-3c, STM-1  
NRZ  
Used with:  
Protocols supported:  
Coding method:  
Range:  
100 m  
Impedance:  
100 Ω  
Transmit levels:  
1v +/- 0.06v  
Pinout  
Pin 1  
Pin 2  
Pin 3  
Pin 4  
Pin 5  
Pin 6  
Pin 7  
Pin 8  
Tx+  
Tx-  
Rx+  
Rx-  
2-8  
ARC-101 Modules  
 
ARC-101 Installation & Operation Manual  
Chapter 2. Installation  
E3 Module  
Figure 2-13 E3 Module Front Panel  
Connector:  
Used with:  
BNC  
Coax cable  
E3  
Protocols supported:  
Coding method:  
Range:  
HDB3  
150 m  
75 Ω  
Impedance:  
Transmit  
1v +/- 0.06v  
T3 Module  
The transmit pulse shape can be determined by jumpers on the module  
(refer to Jumper Settings for E1 & E1/LTU).  
Figure 2-14 T3 Module Front Panel  
Connector:  
BNC  
Used with:  
Coax cable  
DS3  
Protocols supported:  
Coding method:  
Range:  
B3ZS  
150 m  
75 Ω  
Impedance:  
ARC-101 Modules  
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Chapter 2. Installation  
ARC-101 Installation & Operation Manual  
E1 and E1/LTU  
Modules  
The E1 link interface (Coax/UTP), as well as RX/TX ground reference, can be  
determined by jumpers on the module (see Figure 2-16).  
Figure 2-15 E1 Module Front Panel  
Connector:  
BNC (RJ-45)  
Coax (UTP)  
E1  
Used with:  
Protocols supported:  
Coding method:  
HDB3  
Impedance:  
75 (120 )  
0 to -34 dB  
0 to -12 dB  
3v ± 10%  
2.37v ± 10%  
Receive level (with LTU):  
Receive level (without LTU):  
Transmit level balanced:  
Transmit level unbalanced:  
2-10  
ARC-101 Modules  
 
ARC-101 Installation & Operation Manual  
Chapter 2. Installation  
Inserting and  
Removing  
Modules  
To insert a module:  
1. Turn the unit OFF (disconnect the power cord).  
Inserting Modules  
2. Pull on the screws on the module's front panel, so they hang outwards a  
little.  
3. Insert the module onto the sliders, and push the module slowly into the  
unit (make sure that the module is correctly aligned on the sliders).  
4. When the module is almost completely in, push hard, until the module  
clicks into the unit.  
5. Tighten the screws on the module's front panel.  
To remove a module:  
Removing Modules  
1. Turn the unit OFF (disconnect the power cord).  
2. Unscrew the screws on the module's front panel.  
3. Pull the screws hard, until the module dislodges from the unit  
(please pull out the module with care!)  
4. Slowly slide the module out of the unit.  
ARC-101 Modules  
2-11  
 
Chapter 2. Installation  
ARC-101 Installation & Operation Manual  
The jumpers JP5, JP6, JP10, JP11 and JP13 are used to select the link  
interface (Coax or UTP). See Figure 2-16.  
Jumper Settings  
for E1 and E1/LTU  
Figure 2-16 E1 and E1/LTU Jumper Locations  
Turn the module upside down in order to see and move the jumpers.  
JP5, JP6: Designated BAL/UNBAL.  
Note  
BAL (up) for operation in Balanced mode (UTP).  
UNBAL (down) for operation in Unbalanced mode (Coax, default).  
JP10: Place the jumper to connect the BNC shield or RJ-45 screen on the  
TX side to earth (recommended for unbalanced mode)  
JP11: Place the jumper to connect the BNC shield or RJ-45 screen on the  
RX side to earth (recommended for balanced mode).  
JP13: Designate BAL/UNBAL.  
Position 1 for Unbalanced mode with E1 module.  
Position 3 for Balanced mode with E1 module.  
Position 4 for Balanced mode with E1/LTU module.  
Position 4 for Unbalanced mode with E1/LTU module.  
2-12  
ARC-101 Modules  
 
ARC-101 Installation & Operation Manual  
Chapter 2. Installation  
Jumper Settings  
for T3  
Figure 2-17 T3 Jumper Locations  
The jumpers JP1 and JP2 (located near the front panel of the module), are  
used to control the transmit levels, and should be set according to the length  
of the links (see Figure 2-17).  
T3:  
JP1: Designated L/S  
L (Long) for operation with Coax cables longer than 225 feet on the transmit  
side  
S (Short) for operation with Coax cables shorter than 225 feet on the  
transmit side (default)  
JP2: Designated NORM/BOOST  
NORM: For transmit level conforming ANSI.102 (default)  
BOOST: For higher level transmit pulse  
ARC-101 Modules  
2-13  
 
Chapter 2. Installation  
ARC-101 Installation & Operation Manual  
2-14  
ARC-101 Modules  
 
Chapter 3  
Operation  
The ARC-101 has several LED indicators, providing information on the  
ARC-101's general status, as well as right and left module status  
(see Figure 3-1). The indicators are ON, OFF, or BLINK, depending on the  
state of ARC-101. Table 3-1 lists the functions of the front panel indicators.  
Figure 3-1 ARC-101 Front Panel  
Table 3-1ARC-101 LED Indicators  
Name  
PWR (green) ON  
Description  
When ARC 101 is powered.  
Error detected during self-test  
FLT (red)  
BLINKS  
If the error is in one of the modules, the module's two LEDs blink;  
In case of a system error, the two module's LEDs blink.  
ON  
ON  
During self-test  
ATM (green)  
During active ATM connections on the module's port:  
That is when no HEC error was detected during the last second and,  
at least one cell was received and transmitted in the last second.  
SYNC (green) ON  
OFF  
When the module's port is synchronized (no alarm)  
During local alarm (a fault is detected on the receive side of ARC-101).  
During remote alarm the remote unit signals that a fault has been  
detected.  
BLINKS  
Operating Procedure  
3-1  
 
Chapter 3. Operation  
ARC-101 Installation & Operation Manual  
3.1 Operating Procedure  
The interface modules are not hot-swappable. If you install or change  
modules, make sure to first disconnect power to the ARC-101, and then  
remove/install modules slowly and carefully (so as not to damage the modules  
or the ARC-101 enclosure). See section 2.6.  
Note  
Install the ARC-101 as described in Chapter 2. Make sure that the power  
cord is connected to the ARC-101's power connector on the rear panel.  
Plug the other end of the power cord into the mains outlet. The PWR  
indicator on the front panel should light.  
Turning on the  
ARC-101  
Upon power-up, the ARC-101 goes through a self-test that takes about  
40 seconds to complete. The FLT indicator is ON during the self-test. After  
the self-test is completed, if no faults have been detected, the FLT indicator  
is OFF. Detailed test results can e viewed from an ASCII terminal  
connected to the ARC-101's CONTROL port.  
The ARC-101 operates unattended. During normal operation, the PWR  
indicators should light continuously, the FLT indicator should be OFF, the  
ATM indicator should light up when ATM traffic passes through the  
module, and the SYNC indicator should light up continuously.  
Normal  
Operation  
To turn off the ARC-101, disconnect the power cord from the mains outlet.  
Turning off the  
ARC-101  
The following table lists several common problems and their possible  
solutions.  
Procedure in  
Case of  
Malfunctioning  
The PWR LED does not light up  
Fault (FLT) LED blinks  
Check the power cord connection on the back of the unit and at the  
mains outlet.  
Verify power availability at the mains outlet.  
Unplug the unit (power OFF). Make sure that the modules are inserted  
properly. Tighten the modules' screws. Power ON the unit.  
Using an ASCII terminal port, check for a fault indication in the  
Diagnostics window. If there is a fault, inform a qualified ARC-101  
technician.  
Ensure that the plugged-in modules are compatible with the protocol  
used (media, data rate).  
Data transmission difficulties  
Check the module's software configuration in the Configuration window.  
Verify that the SYNC indicator is ON. If it is OFF (indicating a fault in the  
data reception link), run diagnostics on the remote unit from which data  
is being transmitted to the ARC-101. If it is BLINKING (indicating a fault  
in the data transmission link), run diagnostics on the remote unit, or  
implement a loop on the ARC-101 module, and verify that the  
SYNC LED is ON.  
3-2  
Operating Procedure  
 
ARC-101 Installation & Operation Manual  
Chapter 3. Operation  
Figure 3-2 ARC-101 Block Diagram  
Operating Procedure  
3-3  
 
Chapter 3. Operation  
ARC-101 Installation & Operation Manual  
3-4  
Operating Procedure  
 
Chapter 4  
Software Management  
4.1 Introduction  
Monitor mode enables software management of the ARC-101. Four  
categories of software management are available:  
Monitoring the ARC-101 general information via the General Information  
window.  
Changing default configuration parameters via the Configuration window.  
Testing and resetting the ARC-101 via the Diagnostics window.  
Monitoring the ARC-101 performance and status via the Performance  
Monitoring window.  
4.2 Accessing, Using and Exiting Monitor Mode  
To access Monitor mode from the supervisory terminal, perform the  
following:  
To Access Monitor  
Mode  
Connect an ASCII ANSI terminal or a PC capable of emulating an ASCII  
ANSI terminal to the RJ-45 CONTROL connector on the front panel of the  
ARC-101. Terminal communication port setup should have a baud rate of  
9600 bps, 8 bits/character, one stop bit, no parity.  
If using a PC, run a terminal emulation program.  
Make sure the ARC-101 is ON.  
After a few seconds (during which the ARC-101 executes its self-test),  
the main menu will be displayed on the screen.  
ARC MENU  
1. General Information  
2. Configuration  
3. Diagnostics  
4. Performance Monitoring  
ESC. Exit  
Choose item from the menu:  
To select an option, select the item number corresponding to the option.  
If no change is required, press the Escape key (Esc).  
Accessing, Using and Exiting Monitor Mode  
4-1  
 
Chapter 4. Software Management  
ARC-101 Installation & Operation Manual  
4.3 Screen Explanations  
Each of the screens shown below is followed by a detailed explanation of the  
parameters and options appearing in the screen.  
The acceptable value range for each parameter, where applicable, is  
shown in parentheses – "( )".  
The default value for each parameter, where applicable, appears in the  
screens.  
4.4 General Information Window  
To view general information about the ARC-101, such as software/hardware  
versions, basic configuration and self-test results, select option 1 from the  
main menu.  
GENERAL INFORMATION  
Software Version:  
Hardware Version:  
0.0  
0.0  
ATM Rate Converter Configuration:  
Self-Test ended successfully  
E1  
STM-1  
over  
over  
to  
UTP/COAX  
FIBER  
4.5 Configuration Window  
Default configuration parameters can be changed via the Configuration  
window. To enter the Configuration window, select oprtion 2 in the main  
menu. The Configuration screen is divided into 6 submenus/commands:  
System Parameters, Left Module parameters, Right Module parameters,  
ASCII Terminal Configuration parameters, Set Default Parameters and Save  
Changes. Note that some parameters are general while some depend on the  
module type.  
To Set a  
Parameter:  
Select the item number which corresponds to the parameter that you  
want to view/configure.  
4-2  
Configuration Window  
 
ARC-101 Installation & Operation Manual  
Chapter 4. Software Management  
To Save the Configuration:  
CONFIGURATION  
1. System Parameters  
2. Left Module  
3. Right Module  
4. ASCII Terminal Configuration  
5. Set Default Parameters  
6. Save Changes  
ESC. Exit  
After making all changes, return to the Configuration window, and select  
option 6. If a new value was entered at any menu, the following prompt  
will appear upon exiting the menu:  
ALL CHANGES WILL BE SAVED. ARE YOU SURE? (Y/N)  
Type Y for "Yes", or press any other key for "No".  
If you change a module, the ARC-101 will reboot with its default parameters.  
Note  
To return all configuration parameters to their factory defaults, go to the  
Configuration window, and select option 5.  
To Set Default  
Parameters  
If you set the Default Parameters, the Baud Rate parameter will be changed  
and saved as 9600. The ASCII Terminal Baud will be changed to 9600 the next  
time the ARC is restarted.  
Note  
To set system parameters, select option 1 from the Configuration menu.  
System  
Parameters  
SYSTEM PARAMETERS  
1. FIFO Congestion Threshold: 90%  
2. EFCI Marking:  
Disable  
Disable  
Disable  
3. CLP Dropping:  
4. Early Packet Discard:  
ESC. Exit  
Select item from the menu:  
(Default - 75%); options: 25%, 50%, 75%, 90%, 100%  
FIFO Congestion  
Threshold  
The FIFO threshold in which the ARC-101 will enter the "congestion" state  
Configuration Window  
4-3  
 
Chapter 4. Software Management  
ARC-101 Installation & Operation Manual  
The options are 25%, 50%, 75%, 90% and 100%.  
(Default - Disable); options: Enable, Disable  
EFCI Marking  
CLP Dropping  
Enables EFCI marking while FIFO is in congested state. Setting this  
parameter to Enable causes the EFCI marking of all cells that are received,  
while FIFO is in a congested state.  
(Default - Disable); options: Enable, Disable  
Enables CLP dropping when FIFO is congested. Setting this parameter to  
Enable causes cells - with CLP bit set - to be dropped, if they are received  
while FIFO is in a congested state.  
(Default - Disable); options: Enable, Disable  
Early Packet  
Discard  
Enables entire frame, except for last cell, to be dropped when FIFO is  
congested. Setting this parameter to Enable causes frames to be dropped, if  
they are received while FIFO is in a congested state.  
The two windows (Left and Right module configuration, options 2 and 3 in  
the Configuration menu) are identical.  
Right/Left  
Module  
Configuration  
LEFT MODULE  
1. Port Enable/Disable: Enable  
2. Transmit Clock Source:  
3. Loopback State:  
Loopback  
Disable  
4. SONET/SDH Frame Type: STM-1 (SDH)  
ESC. Exit  
(Default - Enable); options: Enable, Disable  
Port Enable/Disable  
If the port is Disabled, no data will be received at the port. Transmit  
functions are not changed. Remote loop is still available. If the port is  
Enabled, received data is transferred to the other port.  
(Default - Local timing); options: Local timing, Loopback timing  
Transmit Clock  
Source  
This parameter selects the clock source for the transmit clock. "Local timing"  
selects the clock that is derived from the oscillator on board. "Loopback  
timing" selects the clock recovered from the received data to be the source.  
Note that for an E1 interface, the default is "Loopback timing" and should  
not be changed. Do not configure the module for Loopback timing while it  
is in Internal Loopback mode.  
4-4  
Configuration Window  
 
ARC-101 Installation & Operation Manual  
Chapter 4. Software Management  
(Default - Disable); options: Disable, Remote, Internal  
Loopback State  
Setting this parameter to Remote will cause a loopback of the incoming  
data and clock to the transmit data and clock (this option is not supported  
with E1). Internal Loopback will cause a loopback of the transmitted data to  
the receive port.  
(Default - STM-1); options: STS-3c, STM-1  
SONET/SDH Frame  
Type  
This parameter is only used in 155 Mbps cards. It defines the Frame Type  
to be STS-3c (SONET) or STM-1 (SDH).  
(Default - Direct); options: Direct, PLCP-Ext' 8Kclk, PLCP-Int' 8Kclk  
DS3 Mapping  
This parameter is only used in T3 card. It selects the DS3 mapping and the  
PLCP clock, in case of PLCP mapping. Direct mode is the HEC mapping  
mode. PLCP mapping with Internal 8Kclk forces the transmit PLCP to be  
synchronized to an on-board clock. PLCP with External 8Kclk uses the  
received PLCP clock as a reference.  
To set ASCII terminal parameters, select option 4 from the Configuration  
menu.  
ASCII Terminal  
Configuration  
ASCII TERMINAL CONFIGURATION  
1. Display Mode:  
2. Baud Rate:  
Color  
9600 Kbps  
ESC. Exit  
Select item from the menu:  
When you change the module's baud rate, you will lose communication with  
the module, until you adjust the baud rate of ASCII terminal or PC to match  
the baud rate of the module.  
Note  
The default display mode is Color. The default baud rate is 9600.  
To change the baud rate:  
1. Set the required baud rate on the ARC-101 monitor (option 2 in the  
ASCII terminal configuration window).  
2. Press the Escape key (ESC).  
3. Change the ASCII terminal baud rate.  
4. A "Press ESC" message will appear on the monitor while synchronization  
is achieved.  
Configuration Window  
4-5  
 
Chapter 4. Software Management  
ARC-101 Installation & Operation Manual  
4.6 Diagnostics Window  
The ARC-101 can be tested and reset via the Diagnostics window. To enter  
the Diagnostics window, select item number 3 in the main menu.  
The Diagnostics window includes the following options:  
General Reset  
Modules Reset & Self-test  
Last Self-Test Results  
Self-test results are displayed on-screen.  
DIAGNOSTICS  
1. General Reset  
2. Module Reset & Self-Test  
3. Last Self-Test Results  
ESC. Exit  
Select item from the menu:  
This mode enables a full test of the ARC-101. This self-test enables  
checking the modules and system card, in addition to the tests performed  
during the right/left module self-tests.  
General Reset  
A self-test can be performed on the ARC-101's modules, including the  
testing of the ATM interfaces and PHY cards.  
Modules Reset  
and Self-Test  
This option is used to monitor the self-test results.  
Last Self-Test  
Results  
4.7 Performance Monitoring Window  
ARC-101 performance and status can be viewed via the Performance  
Monitoring window. To enter the Performance Monitoring window, select  
item number 4 in the main menu. The window provides an option to reset  
the counters and includes two windows:  
4-6  
Performance Monitoring Window  
 
ARC-101 Installation & Operation Manual  
Chapter 4. Software Management  
Link Status  
ATM Status  
PERFORMANCE MONITORING  
1. Link Status  
2. ATM Status  
3. Reset Counters  
ESC. Exit  
The Link Status window displays:  
Link Status  
The number of alarms and errors detected in the last second ("Last  
Second" column).  
The number of errors detected since the last counter reset or overflow  
("All" column).  
The time (in seconds) since the last counter reset.  
Link Status  
STS-3C (FIBER) Last Second ALL  
T3 (Coax) Last Second ALL  
LOS  
LOF  
LOP  
LOC  
SLM  
0
0
0
0
LOS  
OOF  
0
0
0
0
0
0
0
0
AIS  
0
0
0
0
Yellow  
Line AIS  
Path AIS  
0
0
0
0
0
0
BIP  
0
0
0
0
0
0
FEBE  
P1/P2  
Line FERF/RDI 0  
Path FERF/RDI 0  
Section BIP  
Line BIP  
0
0
0
0
0
0
0
0
0
0
PLCP LOF  
0
0
0
PLCP YELLOW 0  
Path BIP  
Line FEBE  
Path FEBE  
PLCP BIP  
0
0
0
PLCP FEBE 0  
Example: Link Status window for ARC-101 in SONET-T3 configuration  
Performance Monitoring Window  
4-7  
 
Chapter 4. Software Management  
ARC-101 Installation & Operation Manual  
SONET/SDH Link Status Window  
LOS  
LOF  
LOP  
LOC  
SLM  
Loss of Signal  
Loss of Frame  
Loss of Pointer  
Loss of Cell Delineation  
Signal Cable Mismatch  
Line AIS  
Line Alarm Indication Signal  
Path AIS  
Path Alarm Indication Signal  
Line FERF/RDI  
Path FERF/RDI  
Line Far End Receive Failure/Remote Defect Indicator  
Path Far End Receive Failure/Remote Defect Indicator  
A '0'' in the "Last Sec" columns of the Alarms listed above, indicates that no errors have occurred. A '1' in the  
"Last Sec." column indicates that there are one or more errors in the last second. The number in the "All"  
column is equal to the cumulative number of seconds in which errors occurred.  
Section BIP  
Line BIP  
Section Bit Interleaved Parity  
Line Bit Interleaved Parity  
Path Bit Interleaved Parity  
Line Far End Block Error  
Path Far End Block Error  
Path BIP  
Line FEBE  
Path FEBE  
T3 Link Status Window - Errors/Alarms displayed in Direct (HEC) Mode  
LOS  
Loss of Signal  
OOF  
LOC  
AIS  
Out of Frame  
Loss of Cell Delineation  
Alarm Indication Signal  
Yellow Alarm  
Yellow  
A '0'' in the "Last Sec" columns of the Alarms listed above, indicates that no errors have occurred. A '1' in the  
"Last Sec." column indicates that there are one or more errors in the last second.  
BIP  
Bit Interleaved Parity  
Far End Block Error  
P1/P2  
FEBE  
P1/P2  
4-8  
Performance Monitoring Window  
 
ARC-101 Installation & Operation Manual  
Chapter 4. Software Management  
T3 Link Status Window - Errors/Alarms displayed in PLCP Mode  
LOS  
Loss of Signal  
Out of Frame  
OOF  
AIS  
Alarm Indication Signal  
Yellow Alarm  
Yellow  
PLCP_LOF  
PLCP_Yellow  
PLCP Loss of Frame  
PLCP Yellow  
A '0'' in the "Last Sec" columns of the Alarms listed above, indicates that no errors have occurred. A '1' in the  
"Last Sec." column indicates that there are one or more errors in the last second. The number in the "All"  
column is equal to the cumulative number of seconds in which errors occurred.  
BIP  
Bit Interleaved Parity  
Far End Block Error  
FEBE  
P1/P2  
P1/P2 Parity Error  
PLCP_BIP  
PLCP_FEBE  
PLCP Bit Interleaved Parity  
PLCP Far End Block Error  
Link Status  
E3 (Coax) last second ALL  
E1 (Coax/UTP) last second  
ALL  
0
LOS:  
OOF:  
LOC  
0
0
0
0
0
0
LOC:  
0
AIS:  
RDI:  
0
0
0
0
BIP:  
0
0
0
0
FEBE:  
Example: Link Status window for ARC-101 in E3-E1 configuration  
Performance Monitoring Window  
4-9  
 
Chapter 4. Software Management  
ARC-101 Installation & Operation Manual  
E3 Link Status Window  
LOS  
OOF  
LOC  
AIS  
Loss of Signal  
Out of Frame  
Loss of Cell Delineation  
Alarm Indication Signal  
Remote Defect Indicator  
RDI  
A '0'' in the "Last Sec" columns of the Alarms listed above, indicates that no errors have occurred. A '1' in the  
"Last Sec." column indicates that there are one or more errors in the last second. The number in the "All"  
column is equal to the cumulative number of seconds in which errors occurred.  
BIP  
Bit Interleaved Parity  
Far End Block Error  
FEBE  
E1 Link Status Window  
LOC  
Loss of Cell Delineation  
A '0'' in the "Last Sec" columns of the Alarms listed above, indicates that no errors have occurred. A '1' in the  
"Last Sec." column indicates that there are one or more errors in the last second. The number in the "All"  
column is equal to the cumulative number of seconds in which errors occurred.  
ATM cell statistics are displayed in this window - the number of events that  
have occurred since counters reset or overflow in the right and left  
modules:  
ATM Traffic  
Monitoring  
Cells transmitted  
Cells received  
Cells discarded due to HEC errors  
ATM STATUS  
Left Module  
Last Sec.  
1200  
All  
412000 Cells  
Transmitted:  
412020 Cells  
Received  
Right Module Last Sec.  
All  
412010  
Cells  
Transmitted:  
1990  
Cells  
Received  
1208  
1990  
412000  
Cells  
Discarded:  
(HEC errors)  
Cells  
Discarded:  
(HEC errors)  
0
0
0
0
Time since the last Counters Reset: 00:34:46  
Press ESC to exit  
4-10  
Performance Monitoring Window  
 
ARC-101 Installation & Operation Manual  
Chapter 4. Software Management  
The Cells Transmitted counter is not valid in Remote Loopback mode, and the  
Cells Received counter in not valid in Internal Loopback mode.  
Note  
The counter precision is 1/10,000.  
Performance Monitoring Window  
4-11  
 
Chapter 4. Software Management  
ARC-101 Installation & Operation Manual  
4-12  
Performance Monitoring Window  
 

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