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MultiLink ML600Ethernet Communications SwitchInstruction Manual

Firmware Revision 1.0.x

Manual P/N: 1601-0222-A2Manual Order Code: GEK-113040A

Copyright 2006 GE Multilin

ISO9001:2000GEMULTIL

IN

REG

ISTERED

GE Multilin's QualityManagement System is

registered to ISO9001:2000

QMI # 005094UL # A3775

GE Consumer & Industrial

GE Multilin

215 Anderson Avenue, Markham, Ontario

Canada L6E 1B3

Tel: (905) 294-6222 Fax: (905) 201-2098

Internet: http://www.GEmultilin.com

*1601-0222-A2*
http://www.gemultilin.com/http://www.gemultilin.com/

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These instructions do not purport to cover all details or variations in equipment nor provide

for every possible contingency to be met in connection with installation, operation, or

maintenance. Should further information be desired or should particular problems arise

which are not covered sufficiently for the purchasers purpose, the matter should be referred

to the General Electric Company.

To the extent required the products described herein meet applicable ANSI, IEEE, and NEMA

standards; but no such assurance is given with respect to local codes and ordinances

because they vary greatly.

2006 GE Multilin Incorporated. All rights reserved.

GE Multilin Multilink ML600 instruction manual for revision 1.0.x.

Multilink ML600 is a registered trademark of GE Multilin Inc.

The contents of this manual are the property of GE Multilin Inc. This documentation isfurnished on license and may not be reproduced in whole or in part without the permissionof GE Multilin. The content of this manual is for informational use only and is subject tochange without notice.

Part numbers contained in this manual are subject to change without notice, and shouldtherefore be verified by GE Multilin before ordering.

Part number: 1601-0222-A2 (November 2006)

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TOCII MULTILINK ML600 ETHERNET COMMUNICATIONS SWITCH INSTRUCTION MANUAL

TABLE OF CONTENTS

5: MISCELLANEOUS REVISION HISTORY ...........................................................................................................5-1RELEASE DATES ................................................................................................................... 5-1CHANGESTOTHE MANUAL ................................................................................................5-1

CONFORMANCE STATEMENTS ......................................................................................5-2FCC RFI STATEMENT .........................................................................................................5-2

WARRANTY .........................................................................................................................5-3

INDEX

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MULTILINK ML600 ETHERNET COMMUNICATIONS SWITCH INSTRUCTION MANUAL 11

Multilink ML600

Ethernet Communications Switch

Chapter 1: Introduction

GE Consumer & IndustrialMultilin

Introduction

1.1 Getting Started

1.1.1 Inspecting the Package and Product

Examine the shipping container for obvious damage prior to installing this product; notifythe carrier of any damage that you believe occurred during shipment or delivery. Inspectthe contents of this package for any signs of damage and ensure that the items l istedbelow are included.

This package should contain:

MultiLink ML600 Ethernet Switch

External AC adapter (for ML600-AC-** units) Set of metal panel mounting clips and screws (2 each)

Remove the items from the shipping container. Be sure to keep the shipping containershould you need to re-ship the unit at a later date.

In the event there are items missing or damaged, contact the party from whom youpurchased the product. If the unit needs to be returned, please use the original shippingcontainer if possible. Refer to Troubleshooting on page 45, for specific return procedures.

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CHAPTER 1: INTRODUCTION INTRODUCTION


1.3 Specifications

1.3.1 Technical Specifications

PERFORMANCEEthernet (10 Mb):..................................... ........14880 ppsFast Ethernet (100 Mb):...................... ..........148,800 pps

Data rate:...........................................................10 Mbps and 100 Mbps

Path delay value:............................................ 50 BT on all ports

LLL (Link Loss Learn): .................................... factory default activated on ports 1 and 2 (allow to flushthe internal address buffer, and qualify to use with STPand RSTP for faster recovery in ring topology)

RELIABILITYMTBF:....................................................................over 15 years, Telcordia (Bellcore) method

NETWORK STANDARDS AND COMPLIANCE100 Mb: ........................................................... ....Ethernet IEEE 802.3u, 100Base-TX, 100Base-FX

10 Mb: ................................................................. .Ethernet IEEE 802.3, 10Base-TAuto-sensing for speed:..............................IEEE 802.3u

PACKET-PROCESSING BETWEEN DOMAINSFilter and forward rate: ...............................14880 pps maximum (at 10 Mbps)

148800 pps maximum (at 100 Mbps)

Processing type:..............................................store and forward, non-blocking

Auto-learning:..................................................2K address table

Address buffer age-out time: ..................300 seconds

Packet buffers memory:..............................128 KB, dynamically shared on all domains

Latency (not including packet time):5 ms (100 to 10 Mbps)15 ms (10 to 100 Mbps)

MAXIMUM ETHERNET SEGMENT (OR DOMAIN) LENGTHS10Base-T (Unshielded twisted pair): .............100 m (328 ft.)

100Base-TX (CAT 5 UTP): .....................................100 m (328 ft.)

100Base-FX, half-duplex (multi-mode): ......412 m (1350 ft.)

100Base-FX, full-duplex (multi-mode): ........2 km (6562 ft.)

100Base-FX, half-duplex (single-mode): ....412 m (1350 ft.)

100Base-FX, full-duplex (single-mode): ......18+ km

PORT CONNECTORSRJ45 ports:.........................................................100Base-TX and 10Base-T with auto-cross (MDIX);

shielded 8-pin female connectors for shielded (STP) andunshielded (UTP) CAT. 3, 4, and 5 cable

Fiber ports: ........................................................100Base-FX with multi-mode SC or ST, or single mode SC

connectors (factory settings default to full-duplex)

LED INDICATORSPOWER: .............................................................. .steady ON when power applied

10/100: ............................................................ ....steady ON for 100 Mbps;OFF for 10 Mbps (copper ports only)

LK/ACT:................................................................steady ON for LINK (LK) with no traffic;BLINKING indicates port is transmitting/receiving (ACT)

F/H:........................................................................steady ON for full-duplex;OFF for half-duplex (fiber port only)

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14 MULTILINK ML600 ETHERNET COMMUNICATIONS SWITCH INSTRUCTION MANUAL

INTRODUCTION CHAPTER 1: INTRODUCTION

ALARM RELAYInternal 60 VA relay contact: ........... ........open for power off

closed for power on (hardware).

POWER SUPPLYThese products are to be supplied by a listed, direct plug-in power unit, marked Class 2, or alisted ITE power supply, marked LPS, which has suitably rated output voltage (i.e. 24 or

48 V DC), and suitably rated output current (i.e. 100 to 500 mA). When connected to a 48 V DCcentralized source, these products shall be provided with a listed 5 A DC fuse in the supplycircuit.

Input (DC units): ...............................................10 to 36 V DC for 24 V DC unit30 to 60 V DC for 48 V DC unit

Input (AC units).................................................6 ft. AC power cord to IEC 320 connector on 100 to240 V AC at 47 to 63 Hz external power adapter (outputof 12 V DC, 1.25 A)

Power consumption:.....................................7.0 W typical, 9 W maximum

1.3.2 Environmental Specifications

OPERATING ENVIRONMENTAmbient temperature: .................................long term per agency tests (UL): 13 to 140F (25 to60C)short term per IEC type tests: 40 to 149F (40 to 85C)Storage temperature: 40 to 160F (40 to 85C)

Ambient relative humidity: ........................5% to 95% (non-condensing)

Cold start:...........................................................to 20C

Altitude: ...............................................................200 to 5000 ft. (60 to 1520 m)

NEBS:....................................................................NEBS compliance, including vibration, shock, and altitude

1.3.3 Physical Specifications

PACKAGING)

Enclosure: ......................................................... rugged sheet metal (steel)

Dimensions:.......................................................3.7 in. 3.0 in. 1.7 in. (H W D)9.4 cm 7.6 cm 4.3 cm (H W D)

Weight: .......................................................... ......13 oz. (370 g) for unit5.8 oz. (165 g) for AC adapter

1.3.4 Approvals and Warranty

APPROVALSUL:..........................................................................UL listed (UL60950), cUL, CE;

FCC:.......................................................................emissions meet FCC part 15 class A

NEBS:....................................................................level 3

ETSI:.......................................................................certified for carrier central offices

IEEE: ...................................................................... IEEE P1613 environmental standard for electric powersubstations

IEC:.........................................................................IEC61850 EMC and operating conditions class C forpower substations

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CHAPTER 1: INTRODUCTION INTRODUCTION


WARRANTY24 months from date of shipment

Manufactured in USA

GE Multilin reserves the right to change specifications, performance, characteristics, and/ormodel offerings without notice.

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INTRODUCTION CHAPTER 1: INTRODUCTION

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Multilink ML600


Chapter 2: Product Description


ProductDescription

2.1 Overview

2.1.1 Introduction to the ML600

The MultiLink ML600 Ethernet Switch is designed as an Ethernet edge solution in heavy-duty industrial, military, and un-controlled temperature applications, as well as aneconomical solution for the growing requirements of managed networks. The ML600series, a six-port versatile family of compact edge switches, loaded with factoryconfigurable fiber and AC/DC power options, alarm terminal block, and innovativepackaging is ready to serve the needs of edge-of-the network applications.

The ML600 switches have a wide breadth of port configurability and fiber port type

options: six 10/100 copper ports or four 10/100 copper ports and two 100 Mb fiber ports.The ML600 is a heavy-duty switch with extended temperature operation ranges forhardened factory-floor applications. The breadth of models and selection of f iber portsoffers the best price-to-value ratio for each user and installation. The compact package isideal for network edge installations, and can be DIN-rail mounted to suit any application.

The MultiLink ML600 switches include a Link Loss Learn (LLL) feature to qualify forredundant and self-healing managed network structures. The LLL feature allows theML600 switches to flush internal address buffers in milliseconds to permit quick changes inLAN packets flow, allowing the reconfiguration signal to pass down the line to other ringswitches in the redundant structure for faster recovery. The ML600 switches, combinedwith other MultiLink managed switches running STP/RSTP, can often provide highavailability redundant LANs at economical cost.

2.1.2 Design Aspects

The MultiLink ML600 Ethernet Switch is designed for factory floor applications. The ML600models are built with high-grade components and constructed using special thermaltechniques and a metal case for heavy duty industrial jobs. In addition to a hardened ACpower option and jack, terminals for internal DC power are available for 24 or 48 V DC. The

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PRODUCT DESCRIPTION CHAPTER 2: PRODUCT DESCRIPTION

unit has an ambient temperature rating of 25 to 60C is for industrial use. No internal airflow is required for cooling, providing resistance to dust, dirt , moisture, smoke, and insects.Mounting options include stand-alone panel-mounting, DIN-Rail, or rack-mount tray.

FIGURE 21: MultiLink ML600 switch

The ML600 includes a hardware operated alarm terminal block for providing extrareliability to the unit. The Alarm feature allows the ML600 user to be aware and monitor

any internal power failure. Refer toAlarm Contact on page 42 for additional details.The front of the unit contains one of the following port combinations:

six 10/100 Mb copper ports

four 10/100 Mb copper ports and two 100 Mb fiber ports

The RJ45 ports support auto-cross (MDIX) operation under auto-negotiation mode only.The ML600 provides switching among the four 10/100 auto-negotiating copper ports andtwo 100Mb fiber ports, which may be multi-mode SC or ST, or single-mode SC. The ML600fiber options and temperature ratings provide many networking options and solutions in avery small footprint.

Two sets of LEDs indicate the port operating status. These are located on the top and frontfor viewing advantage while rack-mounted. Link and Activity (LK/ACT) LEDs indicate thatthe media cables are connected correctly and indicate network traffic by blinking. The LK/ACT LEDs are repeated on the front as 1 to 6 (port 1 to port 6), and on the side as LA1 toLA6. Another set of LEDs on the front (10/100 and F/H) indicate the data rate and duplexmode for ports 1 and 2. The 10/100 LED indicates the speed for copper ports, whereas theF/H LED indicates full and half-duplex for fiber ports only.

There is also a power LED to indicate when the unit is turned ON. The fiber ports on theML600 are multi-mode or single-mode with an SC or ST connector.

The external DC connector and/or jack and the internal DC input terminal is provided onthe rear of the unit.

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CHAPTER 2: PRODUCT DESCRIPTION PRODUCT DESCRIPTION


2.2 Features and Benefits

2.2.1 Frame Buffering and Latency

The ML600 is store-and-forward switch. Each frame (or packet) is loaded into the switch

memory and inspected before forwarding can occur. This technique ensures that allforwarded frames are of a valid length and have the correct CRC (i.e., they are goodpackets). This eliminates propagation of bad packets, enabling all of the availablebandwidth to be used for valid information.

While other switching technologies such as cut-through or express impose minimalframe latency, they also permit bad frames to propagate to the Ethernet network. Thecut-through technique permits collision fragment frames, which are a result of latecollisions, to be forwarded which add to the network traffic. There is no way to filterframes with a bad CRC (the entire frame must be present in order for CRC to be calculated).Since collisions and bad packets are more likely when traffic is heavy, store-and-forwardswitch technology enables more bandwidth to be available for good packets when thetraffic load is greatest.

To minimize the possibility of dropping frames on congested ports, each ML600dynamically allocates buffer space from a 128 KB memory pool, ensuring that heavily usedports receive very large buffer space for packet storage (many other switches have theirpacket buffer storage space divided evenly across all ports, resulting in a small, fixednumber of packets to be stored per port; when the port buffer f ills up, dropped packetsresult). This dynamic buffer allocation provides the capability for the maximum resourcesof the ML600 to be applied to all traffic loads, even when the traffic activity is unbalancedacross the ports. Since the traffic on an operating network is constantly varying in packetdensity per port and in aggregate density, the ML600 switches are constantly adaptinginternally to provide maximum network performance with the least dropped packets.

When the ML600 detects that its free buffer queue space is low, it sends industry standard(full-duplex only) PAUSE packets out to the devices sending packets to cause flow control.This tells the sending devices to temporarily stop sending traffic, which allows a trafficcatch-up to occur without dropping packets. Then, normal packet buffering andprocessing resumes. This flow-control sequence occurs in a small fraction of a second andis transparent to an observer.

Another feature implemented in the ML600 is a collision-based flow-control mechanism(when operating at half-duplex only). When the ML600 detects that its free buffer queuespace is low, it prevents more frames from entering by forcing a collision signal on allreceiving half-duplex ports in order to stop incoming traff ic.

The latency (the time the frame spends in the switch before it is sent along or forwarded toits destination) of the ML600 varies with the port-speed types. The length of the frame isvariable as it is with all store-and-forward switches. For 10 Mb-to-10 Mb, 10 Mb-to-100 Mbor 100 Mb-to-10 Mb forwarding, the latency is 15 s plus the packet time of 10 Mb. For100 Mb-to-100 Mb forwarding, the latency is 5 s plus the packet time of 100 Mb.

2.2.2 Additional Features and Benefits

Full 10 or 100 Mb switching services for high performance Ethernet: The ML600provides fast Ethernet switching on all ports. They perform high speed filter/forwardoperations on the traffic, giving each port segment a full 10 Mb (or 100 Mb) ofbandwidth.

Reduces network costs and provide an economical solution: The ML600 offers theideal solution to efficiently and inexpensively connect a twisted-pair and f iber networkwith 10 or 100 Mb and expand in a convenient and economical way.

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"Plug and play" installation and operation is transparent to software: The ML600operates as a hardware switch, only forwarding packets from each domain that arerequired on the other domains. Internal address tables are self-learning, enablingusers to change port connections or 10/100 domains without affecting operations.

Two sets of LEDs for viewing status from any angle: Each ML600 is equipped withtwo sets (front and side) of LEDs to provide status information when viewed at almostany angle or mounting arrangement.

Rugged metal case: The industrial grade ML600 has a robust design and is packagedin a rugged metal enclosure to ensure high reliability and durability in industrialapplications.

Efficient compact design for all purpose mounting: The ML600 features a compactsteel case with an external AC or DC power supply. The ML600 can be installed in smallspaces in cabinets, on table tops, in racks, walls, or DIN-Rail mounted and in trays.

MDIX ports to eliminate cross-over cable while cascading: All ML600 switchesfeature MDIX (auto-cross), which allows cascading with other switch hubs or mediaedges supporting auto-negotiation, without using the cross-over cable.

Hardware operated alarm terminal block: The alarm contact enables monitoring forinternal power failure, and provides extra reliability to the ML600.

Link Loss Learn feature for faster recovery in redundant managed network: The LLLfeature qualifies the edge switches to actively work along with redundant networkstructure and allow a faster recovery during ring break.

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CHAPTER 2: PRODUCT DESCRIPTION PRODUCT DESCRIPTION


2.3 Applications

2.3.1 Description

The MultiLink ML600 Ethernet Switch adapts well in almost any environment, enabling

quick network scalability and and cost effectively. The edge-of-the-network connectivitysolutions offered by the ML600 provides convenient, economical, and reliable solutions aswell as an active role on the managed redundant network setup for faster recovery. Thecompact ML600 assists fast expanding network requirements by providing edge supportand reliability to the managed redundant network. The dual-speed and dual-mediafunctions support a mixed environment of 10 and 100Mbps and users with copper andfiber media. The switched full duplex fiber port also provides high bandwidth and longerdistance support. The up-link feature of 100 Mb fiber on ports 1 and 2 enable easyexpansion for the on-going demand of Ethernet networks. The 10/100 Mbps auto-negotiating MDIX copper ports and the breadth of 100 Mbps fiber ports enable easyinterfacing with existing cable plant and equipment.

The rugged case provides extra support in the harshest industrial environments. The Link-Loss-Learn feature to provides extra reliability to the redundant network and an

economical solution for faster recovery during a ring break.

2.3.2 Windmill Application

In this example, the central control and monitoring center station is required to collectmonitoring data from various windmills or send control commands to various windmills.

This need can be easily met using the economical MultiLink ML600 Ethernet Switch.Additional functionality includes the ability to transfer data across large distances withmulti- or single-mode fiber while securing the LAN from EMI and wire tapping.

The ML600s six ports in a small, reliable enclosure provide an effective solution to fortransferring real-time transactions from the windmill to the storage device in the controlroom. The easily deployable through DIN-rail option and the dual power source of flexibility

along with flavor of fiber option for distance, the ML600 easily meets all the requirementsof windmill. The ML600 not only provides a reliable solution but also reduces operationalcosts significantly.

FIGURE 22: Windmill application

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2.3.3 Industrial Networking Application

In this industrial networking application, new PLC units are deployed on a networkexpansion. Each PLC requires one (or two for redundancy) Ethernet ports to carry statusand control data to the control center. The ML600 provides a good solution with its multipleoptions and hardened features. The two fiber ports are ideal for secure datacommunications over long distances. Built with high-grade components, efficient cooling

techniques and no openings for dirt, the ML600 switches provide a very effective solutionfor this need.

FIGURE 23: Network with multiple subnets example

2.3.4 Transportation Surveillance System

In this example, the MultiLink ML600 Ethernet Switch is deployed to serve as a securecorporate or transportation surveillance system. CCTV cameras may be spread out over

many miles in temperature un-controlled locations and with pan, tilt and zoom (PTZ)controlled through an Ethernet copper port. The ML600 provides two f iber segments forsecure long distance (2 to 40km) communication while being installed in temperature un-controlled cabinets and allowing for AC or DC power options. The four copper ports at theremote location provides access for other Ethernet equipment such as motion detectors orwill act as a test port for maintenance personnel with up-link for access to a central LANand central file servers.

The ideally suited ML600 with its diversified features, premium rated approvals and cost-effective solution, make an ideal choice in many outdoor environments.

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Multilink ML600


Chapter 3: Installation


Installation

3.1 Preparation

3.1.1 Locating the ML600

The MultiLink ML600 Ethernet Switch operates in transparent half and full-duplex mode.The store and forward switch takes care of network traffic and can be used as a useful,economical tool to expand an existing network.

The compact and lightweight design of the ML600 allows it to be easily installed in almostany location. A velcro strip may be used for mounting the unit on a vertical surface such asa wall or cabinet, or for securing the unit on a table-top or shelf. Alternatively, metalmounting clips and screws are included for a rugged and secure mounting in anyorientation.

Installation of the ML600 is a simple procedure. The installation location is dependent uponthe physical layout of the Ethernet network and associated cabl ing. Ensure the unit isinstalled in a location that is easily accessible to an AC power outlet or the appropriate DCsource and where cooling is not inhibited. The green Power (PWR) LED must turn ON whenpower is applied.

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INSTALLATION CHAPTER 3: INSTALLATION

3.2 Electrical Installation

3.2.1 Power Requirements

The MultiLink ML600 Ethernet Switch is power-efficient and can work DC power or an

external AC power supply. The AC adapter input jack has a 2.5 mm plug, center positive,with a 6 foot length of cord. Refer to Technical Specifications on page 13 for additionaldetails.

The ML600 is designed to be used with UL listed Class II power supplies.

The DC power option has a built-in terminal block for positive, negative, and ground. Detailspecifications on the 24 and 48 V DC options is available in Technical Specifications onpage 13.

When connected to a 48 V DC centralized source, the ML600 should only be installed onlyin restricted access areas (dedicated equipment rooms, electrical closets or the like).

3.2.2 Connecting DC Power

The DC terminal block is located on the rear of the unit and is equipped with three (3)screw-down lead posts. The power terminals are identified as positive (+) and negative (),and they are floating inside the unit so that either of the terminals may be grounded. Thechassis is earth or ground (GND).

Figure 3-1: DC power terminals

The connection procedure is straightforward. Simply insert the DC leads to the ML600power terminals, positive (+) and negative () screws. The use of ground (GND) optional; itconnects to the ML600 chassis. Ensure that each lead is securely tightened from the top.

Always use a voltmeter to measure the voltage of the incoming power supply anddetermine the positive or negative potential lead. The more positive potential lead willconnect to the post labeled +ve and the rest to the ve. The ground can be hooked up

last

When power is applied, the green PWR LED will illuminate.

NOTE

NOTE

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CHAPTER 3: INSTALLATION INSTALLATION


3.3 Connecting Ethernet Media

3.3.1 Description

The MultiLink ML600 switches can be connected to two media types (fiber and copper) at

100Base-TX, 10Base-T and 100Base-FX. CAT 5 cables should be used when making100Base-TX connections. When the ports are used as 10Base-T ports, CAT 3 may be used.In either case, the maximum distance for unshielded twisted pair cabling is 100 m (328 ft.).For 10Base-FL or 100Base-FX multi-mode f iber, 50/125 or 62.5/125 micron cabling can beused. For single-mode fiber, 9/125 micron cabling should be used. Fiber cabling supportsmuch longer cable distance and higher bandwidths compared to copper wiring.

The supported media are summarized below.

It is recommended to use high quality CAT 5 cables (which work for both 10 and 100 Mbps)whenever possible to provide flexibility in a mixed-speed network, since the ML600 switchports are auto-sensing for 10 and 100 Mbps. The auto-cross function does not operate ifthe port is fixed or not supporting auto-negotiation.

3.3.2 Connecting Twisted Pair

The following procedure describes how to connect 10Base-T or 100Base-TX twisted paircables to the RJ45 port . The procedure is identical for both unshielded and shielded

twisted pair cables.Z Using standard twisted pair media, insert either end of the cable

with an RJ45 plug into the RJ45 connector of the port.

Even though the connector is shielded, either unshielded or

shielded cables may be used.

Z Connect the other end of the cable to the corresponding device.

Z Use the LINK LED to ensure proper connectivity.

The LED will be illuminated when the unit is powered and

connection is established. If the LINK LED is off, ensure that the

cable is connected properly and that the device on the other end is

powered up and is not defective.

Z If the LINK LED is not illuminated for port # 1, move the switch

which has a cross-over or up-link for linking to another hub or

switch.

3.3.3 Connecting ST-type Fiber Optics (twist-lock)

The following procedure applies to installations using ST-type fiber connectors.

Table 31: Supported Ethernet media

Media IEEE standard Connector

Twisted-pair (CAT 3 or 5) 10Base-T RJ45

Twisted-pair (CAT 5) 100Base-TX RJ45

Fiber (Multi-mode) 100Base-FX ST, SC

Fiber (Single-mode) 100Base-FX SC, LC

NOTE

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INSTALLATION CHAPTER 3: INSTALLATION

Z Before connecting the cable, remove the protective dust caps from

the tips of the fiber connectors.

Save these dust caps for future use.

Z Wipe clean the ends of the connectors with a soft cloth or l int-free

lens tissue dampened in alcohol.

Ensure the connectors are clean before proceeding.

One strand of the duplex f iber optic cable is coded using color bands at regular intervals.The color-coded strand must be used on the associated ports at each end of the fiber opticsegment.

Z Connect the transmit (TX) port on the ML600 to the receive (RX) port

of the remote device.

Begin with the color-coded strand for this f irst TX-to-RX

connection.

Z Connect the receive (RX) port on the ML600 to the transmit (TX) port

of the remote device.

Use the non-color coded fiber strand.

The LINK LED at the f iber connector will illuminate when a proper connection has beenestablished and when power is ON. The normal cause of the LINK LED not illuminating after

cable connection is improper cable polarity. Swap the fiber cables at the fiber connector to

remedy this situation.

3.3.4 Connecting SC-type Fiber Optics (snap-in)

To connect fiber media to SC connectors,

Z Snap on the two square male connectors into the SC female jacks

of the fiber connector until it clicks and secures.

3.3.5 Connecting Single-mode Fiber Optics

When using single-mode fiber cable, be sure to use single-mode fiber port connectors.Single-mode fiber cable has a smaller diameter than multi-mode fiber cable (9/125microns for single-mode versus 50/125 or 62.5/125 microns for multi-mode, wherexx/xxare the diameters of the core and the core plus the cladding respectively). Single-modefiber allows full bandwidth at longer distances, about 20 km with multi-mode SC.

The same procedures as for multi-mode fiber apply to single-mode fiber connectors.Follow the steps listed in Connecting ST-type Fiber Optics (twist-lock) on page 33.

NOTE

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Multilink ML600


Chapter 4: Operation


Operation

4.1 Functionality

4.1.1 Dual-speed and Switching Functionality

The MultiLink ML600 Ethernet Switch provides SIX switched ports with combination of fiberand copper or copper only. The architecture supports a dual-speed switchingenvironment, with standard auto-negotiation capability.

The switched RJ45 ports are full or half-duplex, auto-sensing for mode and speed, andauto-cross for plug polarity (seeAuto-cross (MDIX), Auto-negotiation, and Speed Sensingbelow). When the connected device is 10 Mbps, the ML600 obeys all the rules of 10 MbpsEthernet configurations. The 10 Mbps users can communicate with 100 Mbps users as

well as other 10 Mbps users through the switch. Similarly, the 100 Mbps traffic obeys therules of 100 Mbps Ethernet, and can communicate with 10 Mb and 100 Mb users. TheML600 is a plug-and-play device. There is no software configuration required forinstallation or maintenance, even for the LLL ports. The internal functions of both aredescribed below.

4.1.2 Switching, Filtering and Forwarding

Each time a packet arrives on one of the switched ports, the decision is taken to either f ilteror to forward the packet . Packets whose source and destination addresses are on thesame port segment will be filtered, constraining them to that one port and relieving therest of the network from having to process them. A packet whose destination address is on

another port segment will be forwarded to the appropriate port , and will not be sent to theother ports where it is not needed. Traffic needed for maintaining the un-interruptedoperation of the network (such as occasional multi-cast packets) are forwarded to allports.

The ML600 operates in the store-and-forward switching mode, which eliminates badpackets and enables peak performance when there is heavy traff ic on the network.

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OPERATION CHAPTER 4: OPERATION

4.1.3 Address Learning

All ML600 units have address table capacities of 4K node addresses suitable for use inlarger networks. They are self-learning, so as nodes are added, removed or moved fromone segment to another, the ML600 automatically keeps up with node locations.

An address-aging algorithm causes least-used addresses to fall out in favor of frequently-used addresses. To reset the address buffer, recycle the power supply.

4.1.4 Auto-cross (MDIX), Auto-negotiation, and Speed Sensing

The RJ45 ports independently support auto-cross (MDI or MDIX) in auto-negotiation modeand work properly when the other connected device also supports auto-negotiation. Nocross-over cable is required while using the auto-negotiation port at both ends. The portsperform auto-cross selection only during auto-negotiation, and it will not take effect if theport is in f ixed mode on the other end. Operation is according to the IEEE 802.3u standard.

Auto-negotiation takes place when a RJ45 cable connection is made and a LINK isenabled. The ML600 advertises its capability for 10 or 100 Mbps and full/half-duplex mode.Similarly, the device at the other end of the cable should advertise/respond and both sidesagree to the speed and mode being used. Depending upon the connected device, this will

result in agreement to operate at either 10 or 100 Mbps, in full or half-duplex mode.

4.1.5 Status LEDs

The following status LEDs are included:

PWR: Power LED, ON when external power is applied to the unit.

LK/ACT: Steady ON for LINK with no traffic, blinking for port activity. The LINK LED

will turn off in the event connectivity is lost between the ends of the twisted pair

segment or a loss of power occurs in the unit or remote device. The Link ports are

also represented by LA1, LA2, LA3, LA6 (steady-on or steady-off indicates no

receive activity).

100/10: Speed LED, ON when the speed is 100 Mbps, OFF when the speed is10 Mbps (copper only).

F/H: Full/half-duplex LED, ON when the port is running full-duplex, OFF for half-

duplex (fiber only).

On the copper models, the 10/100 LEDs applies to copper ports only. For models with f iber,the F/H applies to the fiber port only.

4.1.6 Alarm Contact

The alarm contacts feature provides normally closed (NC) contacts for one set of statusmonitoring wires at the green terminal block. The terminal block for alarm contacts is partof the power input panel; the DC power input connection is in the same panel.

NOTE

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CHAPTER 4: OPERATION OPERATION


FIGURE 41: Alarm contact terminal block

The NC alarm contact is held closed when there is power on the main board inside of theML600. This provides a hardware operated alarm since the NC contacts will open wheninternal power is lost, either from an external power down condition or by the failure of theinternal power supply.

Take note of the following aspects of the alarm contacts:

1. The two-position terminal block is provided next to the DC power input, asshown above.

2. The alarm relay contact is hardware operated.

3. By default, the alarm relay contact is NC (normally closed). It will open if there

is any loss of power to the electronics inside of the unit .

4.1.7 Power Budget Calculations with Fiber Media

Receiver sensitivity and transmitter power are the parameters necessary to compute thepower budget. To calculate the power budget of different fiber media installations using

MultiLink products, the following equations should be used:

(EQ 4.1)

where: OPB = optical power budgetPT= transmitter output powerPR = Receiver Sensitivity

The worst case OPB is as follows:

(EQ 4.2)

The worst-case distance is calculated as follows:

(EQ 4.3)

The cable loss in dB/km is defined in the following table:

OPB Pt min( ) PR min( )=

OPBworst OPB 1dB (LED aging) 1dB (insertion loss)=

distanceworstworst-case OPB (in dB)cable loss (in dB/km)

--------------------------------------------------------=

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The data in Power budget values for various modules on page 44 has been collected toprovide guidance to network designers and installers.

The use of either multi-mode or single-mode fiber to operate at 100 Mbps speed over longdistances (i.e., in excess of 400 m) can be achieved only if the following are applied:

1. The 100 Mb fiber segment must operate in full-duplex (FDX) mode (i.e. the full-duplex (factory default).

2. The worst-case OPB of the fiber link must be greater than the fiber cable's

passive attenuation, where attenuation is the sum of cable loss, LED aging

loss, insertion loss, and safety factor.

Table 41: Cable losses

Cable size Mode Cable loss

62.5 / 125 m multi-mode 2.8 dB/km

50 / 125 m multi-mode 2.8 dB/km

100 / 140 m multi-mode 3.3 dB/km

9 / 125 m single-mode 0.5 dB/km0.4 dB/km (LXSC25)0.25 dB/km (LXSC40)0.2 dB/km (LXSC70)

Table 42: Power budget values for various modules

Module Speed Mode fdx (hdx) Size PT PR OPBworst dworst OPBtyp dtypical

B2, B3 100 Mb FX multi 2 (0.4) km 1300 nm 62.5/125 m50/125 m

-20 dB-23.5 dB

-31 dB-31 dB

9.0 dB5.5 dB

3.0 km2.0 km

14dB12dB

5 km4 km

B4 100 Mb FX single 18+ (0.4) km 1300 nm 9/125 m -15 dB -31 dB 14 dB 28 km 17.5 dB 35 km

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CHAPTER 4: OPERATION OPERATION


4.2 Troubleshooting

4.2.1 Overview

All MultiLink Ethernet products are designed to provide reliability and consistently high

performance in all network environments. The installation of a ML600 is a straightforwardprocedure (see chapter 2 for details)

Should problems develop during installation or operation, this section is intended to helplocate, identify and correct these types of problems. Please follow the suggestions listedbelow prior to contacting your supplier. However, if you are unsure of the proceduresdescribed in this section or if the ML600 is not performing as expected, do not attempt torepair the unit; instead contact your supplier for assistance or contact GE Multilin.

4.2.2 Before Calling for Assistance

1. If difficulty is encountered when installing or operating the unit, refer tochapter 2. Also ensure that the various components of the network are

interoperable.2. Check the cables and connectors to ensure that they have been properly

connected and the cables/wires have not been crimped or in some way

impaired during installation (about 90% of network downtime can be

attributed to wiring and connector problems.)

3. If the problem is isolated to a network device other than the ML600, it is

recommended that the problem device be replaced with a known good

device. Verify whether or not the problem is corrected. If not, go to the next

step. If the problem is corrected, the ML600 and its associated cables are

functioning properly.

4. If the problem continues after completing the previous step, contact GE

Multilin.

4.2.3 When Calling for Assistance

Please be prepared to provide the following information.

1. A complete description of the problem, including the following: the nature andduration of the problem, situations when the problem occurs, the componentsinvolved in the problem, and any particular appl ication that appears to createthe problem.

2. An accurate list of GE product model(s) involved, with serial number(s). Include

the date(s) that you purchased the products from your supplier.

3. It is useful to include other network equipment models and related hardware,

including personal computers, workstations, terminals and printers; plus, the

various network media types being used.

4. A record of changes that have been made to your network configuration prior

to the occurrence of the problem. Any changes to system administration

procedures should all be noted in this record.

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Multilink ML600


Chapter 5: Miscellaneous


Miscellaneous

5.1 Revision History

5.1.1 Release Dates

5.1.2 Changes to the Manual

Table 51: Release dates

Manual Revision Release Date

GEK-113040 1.0x June 3, 2005

GEK-113040A 1.0.x November 17, 2006

Table 52: Changes to Manual Revision A2

Section Description

1.3.1 Change Maximum Ethernet segments to 18+ Km

General Manual revised to A2

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MISCELLANEOUS CHAPTER 5: MISCELLANEOUS

5.2 Conformance Statements

5.2.1 FCC RFI Statement

Federal Communications Commission (FCC)

Radio Frequency Interference Statement

This equipment generates, uses and can radiate frequency energy and if not installed andused properly, that is in strict accordance with the manufacturer's instructions, may causeinterference to radio communication. It has been tested and found to comply with thelimits for a Class A computing device in accordance with the specifications in Subpart J ofPart 15 of FCC rules, which are designed to provide reasonable protection against suchinterference when operated in a commercial environment. Operation of this equipment ina residential area is likely to cause interference, in which case the user at their ownexpense will be required to take whatever measures may be required to correct theinterference.

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CHAPTER 5: MISCELLANEOUS MISCELLANEOUS


5.3 Warranty

General Electric Multilin (GE Multilin) warrants each device it manufactures to be free fromdefects in material and workmanship under normal use and service for a period of 24months from date of shipment from factory.

In the event of a failure covered by warranty, GE Multilin will undertake to repair or replacethe device providing the warrantor determined that it is defective and it is returned with alltransportation charges prepaid to an authorized service centre or the factory. Repairs orreplacement under warranty will be made without charge.

Warranty shall not apply to any device which has been subject to misuse, negligence,accident, incorrect installation or use not in accordance with instructions nor any unit thathas been altered outside a GE Multilin authorized factory outlet.

GE Multilin is not liable for special, indirect or consequential damages or for loss of profit orfor expenses sustained as a result of a device malfunction, incorrect application oradjustment.

For complete text of Warranty ( including limitations and disclaimers), refer to GE MultilinStandard Conditions of Sale.

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MISCELLANEOUS CHAPTER 5: MISCELLANEOUS

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INDEX

MULTILINK ML600 ETHERNET COMMUNICATIONS SWITCH INSTRUCTION MANUAL II

Index

A

ALARM RELAYspecifications ................................................................................................... 1-4

APPLICATIONS................................................................................................... 2-5APPROVALS ....................................................................................................... 1-4

B

C

CABLE LOSSES .................................................................................................. 4-4CHANGES TO THE MANUAL ............................................................................. 5-1

D

DESIGN ASPECTS .............................................................................................. 2-1

E

ENVIRONMENTAL SPECIFICATIONS ................................................................ 1-4ETHERNET

connecting ........................................................................................................ 3-3power budget calculations ............................................................................... 4-3specifications ................................................................................................... 1-3

F

FCC APPROVAL ................................................................................................. 1-4FEATURES .......................................................................................................... 2-3FILTERING .......................................................................................................... 4-1FORWARDING ................................................................................................... 4-1FUNCTIONALITY ................................................................................................ 4-1

G

H

I

IEEE APPROVAL ................................................................................................. 1-4INSTALLATION ................................................................................................... 3-1

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III MULTILINK ML600 ETHERNET COMMUNICATIONS SWITCH INSTRUCTION MANUAL

INDEX

J

K

LLEDS

functionality ......................................................................................................4-2

M

N

O

ORDER CODES ....................................................................................................1-2

P

PACKAGING ........................................................................................................1-4POWER BUDGET CALCULATIONS ....................................................................4-3POWER SUPPLY

specifications ....................................................................................................1-4

PRODUCT DESCRIPTION ...................................................................................2-1

Q

R

REVISION HISTORY ............................................................................................5-1

S

SPECIFICATIONS ................................................................................................1-3SWITCHING FUNCTIONALITY ...........................................................................4-1

T

TROUBLESHOOTING ..........................................................................................4-5

U

UL APPROVAL .....................................................................................................1-4UNPACKING THE SWITCH .................................................................................1-1

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INDEX

MULTILINK ML600 ETHERNET COMMUNICATIONS SWITCH INSTRUCTION MANUAL IIII

V

W

WARRANTY .......................................................................................... 1-1, 1-5, 5-3

XYZ

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INDEX

manual ml600 - ge

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