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
12 Hanechoshet Street
Tel Aviv 69710 Israel
Tel: 972-3-6458181
Fax: 972-3-6498250
E-mail: rad@ rad.co.il
3631 South Harbor Boulevard
Suite 250
Santa Ana, CA 92704
Tel: (714) 850-0555
Fax: (714) 850-1555
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:
SafetyStatusPorts
SELV*ATM, VTP/155, CX/BBC/155, T3, E3
TNV**operating within limits of SELVE1
* 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
Data Rate..............................................................................................................................................1-4
Control Port..........................................................................................................................................1-4
2.1 General .............................................................................................................................................2-1
General Reset .......................................................................................................................................4-6
Modules Reset and Self-Test..................................................................................................................4-6
Last Self-Test Results .............................................................................................................................4-6
Link Status .................................................................................................................... ........................4-7
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 ARC-101 Rate Conversion Application
Figure 1-1
.
ARC-101 Features1-1
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.
Interfaces
Supported
Rate Adaptation
The ARC-101 supports a wide variety of ATM data rates and media types,
both electrical and optical.
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.
Easy Migration
User
Management
and Monitoring
Indicators
Compatibility
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.
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).
The ARC-101 complies with ATM Forum specifications.
ATM cells are transferred from one interface to the other through an
internal bus, the bandwidth of which is 180 Mbps.
•
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.
Loopback Mode
•
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.
ARC-101 Features1-3
Chapter 1. Introduction
1.3 Specifications
ARC-101
Installation & Operation Manual
Data Rate
Indicators
Control Port
Power
Physical
PWR
FLT
ATM
SYNC
Interface
Up to 155 Mbps
ON when unit is powered
BLINKS when self-test fails
(ON during self-test)
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
RS-232/V.24 at 9600/19200/38400 baud (configurable) with RJ-45
connector.
Default - 9600 baud.
Voltage90-260 VAC or -48 VDC
Frequency47-63 Hz
Power25 Watts
Height 4.4 cm / 1.8 in (1U)
Width 21.6 cm / 8.5 in
Depth 29.8 cm / 11.7 in
Weight1.1 kg / 2.8 lb
Environment
1-4Specifications
Temperature0°-45°C/32°-113°F
HumidityUp to 90%, non-condensing
Radiation SuppressionComplies with FCC part 15, subpart J, Class A
Complies with EN55022, Class A
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