Wide-Area NetworkS O L U T I O N S G U I D E

( 8 0 0 ) 4 D C B N E T

( 8 0 0 ) 4 3 2 - 2 6 3 8

http://www.dcbnet.com

Equipment forFrame Relay, Wireless, Digital, T1, ISDN, Analog, Dial Up, Switched Digital

Solutions forRemote Access, Frame Relay, Multiplexers, Voice/Data,

Wireless, T1 Access, Internet, LANs, Terminal Servers, Service

“Not always is the least expensive solutionthe best, but in this case I was very satisfiedwith the outcome.”

“When I installed them [multiplexers], theyworked immediately. I had never configuredports on a stat mux before and I had absolutelyno trouble.”

“Russ, I’ve been in this business since 1964and have installed more equipment than Icare to remember. Never before have I expe-rienced this level of support and dedication.”

“During the problem determination and resolution process the best technical supportwe received was from Rob at DCB customerservice.”

“You have a good staff to work with.”

“Your remarkable knowledge of UNIX andasynchronous communications coupled withyour thorough understanding of our networkconfiguration proved invaluable throughoutthe planning process. That the networkworked properly right out of the chute,without any testing period, is a tribute toboth your attention to detail and the qualityof the hardware … It is indeed a pleasure to work with such an outstanding team ofprofessionals. I look forward to a continuingsuccessful partnership with DCB.”

“Thanks for the extra effort on your part.Without your support in our emergency,our… operation would have been seriouslyaffected… without you leaving your dinnerengagement and providing the spare unit,their [the customer’s] efforts would havebeen wasted.”

Our Customers Say…

Data Comm for Business, Inc.807 Pioneer email: info@dcbnet.comChampaign, IL 61820 web: http://www.dcbnet.com

217.352.3207 800.432.2638 FAX 217.352.0350

Data Comm for Business■ A full line of proven solutions

■ Professional, competent support

■ Reliable, easy to set up, easy to use products

■ Products with helpful diagnostic features

■ The convenience of a single source

If you borrowed this brochure, call for your own free copy!

1800.432.2638

SOLVE DATA

COMM PROBLEMS!SAVE MONEY!FRAME RELAY!Service, Service, Service… It bears repeating! At DCB, we knowyou have real life business problems to solve. Data communications has tobe a no-hassle issue. (Remember DCB stands for Data Comm for Business).We’re committed to providing quality service that you can count on. Ourcustomer service is second to none and sets us apart from those “box mover”companies. Just call us and ask a question. Both pre-sale and post-sales support is not only priceless, its free!

Latest Technologies… Frame Relay! Our SRX multiplexer andDSUs take advantage of Frame Relay to solve your multiple site problemswhere conventional multi-drop doesn’t quite fit. Our LAN based productfamily continues to grow. Our product line has evolved for over 15 years byincorporating the latest proven technology.

Save Money… Over and over again. Frame Relay is the newest money-saver in the communications world. If your network uses long distanceleased circuits, you can probably save money by converting to our SRX lineof Frame Relay compatible products. Frame Relay tarrifs are especiallyhelpful on circuits that cross local telephone company boundaries. FrameRelay is a dream come true for organizations with multiple sites.

Wireless Connections… From distances of a few hundred feet toover 20 miles; wireless equipment can now connect your LANs, PCs, orterminals. DCB wireless modems operate at speeds from 56 Kbps to full 10 Mbps Ethernet.

Dear Network Users,You will find this network solutions guide valuable. This publication features solutions for frame relay, multiplexing, LAN and Internet connectivity, voice/data solutions and wide area network maintenance.DCB sells business solutions, backed up by products that work and byDCB employees who know we succeed only when the customer succeeds.

We invite you to call DCB, where a live person (sometimes even thecompany president) answers the phone. We offer you personal service thatstarts with your first phone call and continues as we help you evaluatesystem requirements, work through installation, and help with any subsequent support and maintenance.

Take a close look at DCB frame relay solutions. Frame relay providescost effective networking for point to point, point to multipoint andmeshed networks. In many instances, frame relay saves enough on linecosts to justify changing from private line analog or digital circuits to aframe relay network.

We have many more solutions in addition to frame relay. Browsethe catalog and see for yourself. Then give us a call! Find out why somany customers have said “We couldn’t have done this without DCB”.

INSIDE THIS ISSUE

Frame Relay Solutions ......................... 2An Overview Point-to-MultipointPoint-to-Point Multihost

Data Comm Configurations ................ 4An Overview MultidropPoint-to-Point Hubbing

Wireless Solutions ................................ 5Remote Office 10 MbpsRemote Office 1.5MbpsRoving/Portable Users

Multiplexing Solutions ........................ 6Point-to-PointMulti-Drop Single HostMulti-Drop Multiple Host

LAN Connectivity Solutions ............... 8Chassis Based RoutersSync RoutersAsync Routers

RS-232 Access Solutions ................... 10SNMP And Out-of-Band ManagementNetwork ManagementISP or Data CentersRemote Offices

Internet Connectivity Solutions ........ 12Internet ConnectionsFirewallInternet Servers

Terminal Server Solutions ................ 13UNImux Server

ISDN .............................................. 13Voice/Data Integration Solutions ...... 14

Voice/Data Integration

T1 Access Multiplexer Solutions ........ 14Channel Banks

High Speed Fiber Optic Solutions ..... 15DCB Services .................................. 15Installation Example ........................ 16Product Details ................................ 18

Frame Relay Voice-DataDigital Service Units AccessMultiplexers LAN RoutersModems LAN HubsTerminal Servers EthernetAdapters WirelessT1

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FRAME RELAY SOLUTIONS

Frame Relay is the data communications technology many of us have been anticipating. This technology is now offered by all long distance telephone companies and most local carriers.Frame Relay brings two major advantages to both the user andthe telephone company. First, it better utilizes telephone com-pany equipment and lines so rates are lower than leased lines.

And second, since it is a mesh type network (truly a switchingfabric instead of dedicated fixed circuits), it’s more reliable.With these two advantages, Frame Relay makes the price of anetwork almost independent of the distance between the sites!This technology also has advantages that really shine with burstytraffic such as LAN-to-LAN or terminal communications.

Your data enters the telco system through a new device, aFrame Relay Assembler/Disassembler called a FRAD. TheFRAD formats your data stream for the telco network. It alsoadds addressing information to the data; and most importantly,breaks the stream into small packets of data. The telco systemcan handle these packets efficiently and at high speed. Althoughthe system is almost error free, all error detection and correctionis done by the customer’s equipment, letting the telco trans-mission system operate even faster. Since each packet of datahas an address attached to it, you can send different packets todifferent locations… multi-drop type operation without thepain of multi-drop troubleshooting!

Your data packets are merged with other packets withinthe telco system and flow through a mesh type network. Sinceeach packet has address information, if any path in the mesh is down or congested, the system can automatically reroutethrough another path. This makes reliability much greaterthan the old leased circuits at lower cost. At the destination,your packets are filtered out of the packet stream and sent only to your location. This is the same technology telephonecarriers use in their internal networks. Only now, the cost islow enough for users to take advantage of it.

Frame Relay has another advantage, It’s great for “bursty”traffic.Telephone companies priced it with the ability to carrymore data at any given time period than the customer “commits”to and pays for. That is, they will let you connect at a higherspeed than the billing rate. You can “over speed” the connectionfrom time-to-time to allow bursts of high speed data traffic.For example, you may have an average throughput of 32 kbpswith bursts to 56 kbps. You might get a “committed informationrate” (or CIR) of 32 kbps instead of the full 56 kbps. This isespecially handy for LAN traffic. Some carriers even let youcommit to different rates for each direction. If the host site sendslarge printed reports or database updates to the remotes, andthe remotes only send keystrokes to the host; you can get 56kbps in one direction and only pay for 2.4 kbps in the other.

Frame Relay networks are great replacements for old multi-drop networks. Since the telephone company filters packetsfor you, troubleshooting is easier than with older multi-dropcircuits. Each site receives only the packets destined for it, notall the traffic. Imagine a frame relay network with the host endrunning at 56 kbps and each of 16 sites running at 24 kbps.Compare that to the older technology multi-drop networkrequired to support the same system!

How It Works

DCB, premier manufacturer of statistical multiplexers withbuilt in frame relay technology, also manufactures multi-portasynchronous FRADs. Our SR FRADs work in both point-to-point and point-to-multipoint Frame Relay networks.These FRAD products allow you to take advantage of Frame

Relay while using your existing asynchronous equipment. Wealso connect LAN’s using both FRAD technology and via any port of a multiplexer connected to a Frame Relay network. Ifit’s long distance, Frame Relay can probably save you money!

DCB’s Frame Relay Solutions

An Overview

3800.432.2638

PCs or Terminals

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Up to 16 Remote Locations 64 Total Devices

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SR Mux

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SR Mux

Up to 16 Remote Locations 32 Total Devices

Frame Relay Point-to-Multipoint

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Host or ServerNetwork management

built into every DCB multiplexer

Any link errors are corrected by DCB Multiplexers

SR Mux

DSU

DSU

SR Mux

TELCO Frame Relay

Frame Relay Point-to-Point

4 800.432.2638

DATA COMM CONFIGURATIONS

There are several alternatives for wide area network configura-tions. Each has its advantages and limitations. Since all of DCB’sproducts exceed your performance and reliability expectations,the overriding consideration in selecting a wide area network

configuration is recurring line costs. In as little as 6 months insome cases, recurring line costs become the most expensiveportion of a wide area network. Different configurations maybe used to save money on recurring line costs.

Point-to-Point is the simplest wide area network configuration.Each remote office is connected to the host site with its ownline. This network configuration is the simplest to maintain but,it is usually the most expensive in recurring line costs. When-ever recurring line costs are equivalent between the differentconfigurations (which is very unusual), the simplest networkconfiguration should be used to simplify network management.

In a Multidrop configuration, several remote locations are con-nected to a single host location over the same communicationschannel. Each remote location can communicate to the hostlocation, and the host location communicates with all of theremote locations. The host equipment broadcasts messages toall remote locations and must “address” the message to identifythe intended remote location. Since the remote locations must“share” the communications channel back to the host, remote equipment can only respond when the host has “addressed” it. This line control is done by the communications equipment. Usually, Multidrop equipment is more expensive than Point-to-Point equipment, but the extra cost is more than offset by the recurring line cost savings.

The Hubbing configuration is used when multiple remotesites are close together. It is much less costly in recurring linecosts to have several short lines feed into one remote site andall share a single long line to the host site. In a Hubbing configuration, special equipment is needed to combine the multiple data streams onto the single data channel and to separate them at the other end of the line. The additional cost of the Hubbing equipment is offset by the recurring line cost savings.

Point-to-Point

Multidrop

Hubbing

An Overview

One Local andOne Remote Office

Remote OfficeTELCO

Services

Headquarters

Remote Office

Remote Office

Remote Office

TELCO Services

Headquarters

Remote Office

Headquarters

TELCO Services

Remote Office

TELCO Services

One Local and Several Remote OfficesWhen Remote Offices Are Near Each Other

One Local andMultiple Remote Offices

5800.432.2638

WIRELESS SOLUTIONS

WIRELESS LAN-TO-LANConnect the remote office LAN with a microwave link running at full ethernet speed. It s easier than you think and is like having the actual ethernet cable extended to the remote office. Full 10 Mbps ethernet license-free units are available on the new 24 Ghz band. We also have slower options for connecting your office and home.

WIRELESS TERMINAL CONNECTIONS

Connect remote terminals to the host computer with wirelessmodems. Distance is no longer a barrier to good terminalperformance. Replace leased telephone lines with ourradio links for multiplexers or termi-nals running at speeds of 9.6 Kbps to1.544 Mbps. Models use license freespread spectrum at 900 MHz and 2.4GHz or licensed bands at 23 GHz.

Wireless WAN

Wireless LANPeople on the move can have real LAN access from portable computers, forklifts,tractors and trucks on your campus or farm. You won t be wired to one desk oreven one office. Ideal for shared desk and shared office locations.

Router/RF Unit

Up to1.5 Mbps

Host or Server

LAN

MODEL RANGE MAXIMUM SPEED FREQUENCY LICENSED ANTENNA

NVK 12 miles, LOS 9.6 to 64 Kbps Sync, 38.4 Kbps Async 900 MHz No YagiNVK 12 miles, LOS 9.6 to 64 Kbps Sync, 38.4 Kbps Async 2.4 GHz No Yagi875 3 miles, LOS T1 (LAN interface) 2.4 GHz No Yagi875 3 miles, LOS 10 Mbps or T1 * 23 GHz Yes 9" Dish950 10 miles, LOS 10 Mbps and T1 * or 20 Mbps * 23 GHz Yes 2’ Dish950 Over 10 miles ** 10 Mbps and T1 * or Multiple (4) T1 * 23 GHz Yes 4’ Dish990 1/2 mile, LOS 10 Mbps Ethernet 24 GHz No 2’ Dish890 1000’, LOS 10 Mbps Ethernet 24 GHz No 9" DishR-L 3 miles, LOS T1 2.4 GHz No Yagi

Sierra 2 miles, LOS 10 Mbps * 31 GHz Yes 9" DishBL121 2 to 20 miles, LOS 56 Kbps to T1 2.4 GHz No 2’ Dish

DGR115 to 20 miles, LOS 1.2 to 115 Kbps Async 900 MHz No Yagi

LOS: Line of sight * Models available with video capability. ** Path engineering may verify even longer ranges.

PCs

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Cut out the middleman (eliminate monthly telephone bills)Payback times for wireless connections are often less than one year. Radio modems connecting two locations five or six milesapart usually cost less than $3,500. That link runs at 64 Kbps, plenty fast enough for most LAN-to-LAN router applications.Blazingly fast for terminal connections. No hassle installation is less than a day. Many of our radio modems use spread-spectrumtechnology with no license needed.

6 800.432.2638

Modems

ModemsMultiple, expensive

data lines

Host or Server Host or Server

All on one line!

Multiple PCs or terminals Up to 32 PCs or terminals on one line

Modem or DSU

Mux

Modem or DSU

Mux

Link speeds to 64 Kbps

DCB Muxes correct all link errors

Network management built into every DCB multiplexer

MULTIPLEXING SOLUTIONS

Statistical multiplexers make it possible for multiple PCs orterminals to share a single data line. They also perform errorcorrection to insure error-free transmissions. The term “statis-tical” refers to their ability to take advantage of the intermittentusage statistics of all PC and terminal users. Because keyboards

are idle a large part of each second with no one typing and nodata being sent from the computer, each PC or terminal oftenaverages less than 5% of its potential data rate. Statistical mul-tiplexers allow the sum of the PC and terminal rates to exceedthe composite link speed between the multiplexers.

WITH STATISTICAL MULTIPLEXINGWITHOUT STATISTICAL MULTIPLEXING

DCB Statistical MultiplexersDCB offers a wide range of products to deliver top performancein any size network — from a single remote site to those sup-porting hundreds of remote terminals. To help you save onnetwork line costs, DCB’s statistical multiplexers are availablein all networking options — point-to-point, multi-point, andhubbing. With multiple choices of technology, long distancecarriers and telephone rates that vary by location, these prod-ucts offer you a variety of options so you can design the mostcost-effective network for your money. We’ll even help youdesign the system! Application assistance is free, large projectconsulting is available.

If you have more than one terminal at a remote location,you can increase performance, reliability and save money withDCB statistical multiplexers.

Lower recurring network costs — Save moneywith the networking option (point-to-point, hubbing or multipoint) that offers the greatest savings in your situation.Easy installation — The design simplicity of DCB’sstatistical multiplexers makes them easy to install, use andmaintain.High performance — DCB products are engineeredwith the newest, most powerful data communications andcompression technologies.Network control — DCB’s remote network managementtools give you complete control of your local and remote sites.Comprehensive network support — Extensivefeatures for support and network diagnostics.

Statistical Multiplexing: An Overview

7800.432.2638

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built into every DCB multiplexer

SR Mux

Modem or DSU

Modem or DSU

SR Mux

TELCOPoint-to-Point Any link errors are corrected by DCB Multiplexers

Up to 32 Remote Locations 64 Total Devices

Up to 32 Remote Locations 32 Total Devices

8 800.432.2638

LAN CONNECTIVITY SOLUTIONS

As soon as people become accustomed to the convenience andpotential of LAN based PCs and workstations, they see theadvantages of connecting all remote office LANs together.Novell, Microsoft and Apple products have now maturedenough to make networking both affordable and easy enoughfor every organization to use. In fact, your organization isprobably missing out on major productivity gains if you aren’t using this technology.

In their simplest form, remote LAN interconnections use a device that routes the proper information between differentlocations without sending all the local information over thewide area network (WAN). Since local LANs typically run at 10 million bits per second (bps), all that local informationwould be too much data to send on a slower speed WAN that is typically 56 thousand bps or slower. The device that performs

this filtering function is a router. Remote routers have at leastone LAN connection and one WAN connection. They deter-mine what information is addressed to the remote LAN andforward it there. The router also performs a security function by hiding all other information on the LAN and preventingoutside users from getting into the local LAN. If you’re con-nected to the Internet, a router is the unit between your LANand the Internet. Most routers attach to the telephone companywires through a DSU (Data Service Unit). Many office workersnow bring computer work home at night. With “remote node”and “remote control” software and hardware, your portable orhome computer can be connected to the office LAN whenyou’re away. Each method has limitations and advantages.You can even use a cellular phone modem to access the LANfrom your car.

DCB LAN products include remote routers sized for all orga-nizations from the smallest with only two locations all the wayup to large organizations with multiple locations and the needfor high-speed lines. We also supply those hard-to-find itemssuch as Category 5 cables tested at 100 Megabit rates, trans-ceivers, workgroup hubs, network interface cards, and otherwiring hardware. We are Sun Microsystems authorized toprovide the popular Netra Internet server.

DCB can help you connect remote LANs or provide theassistance you need to access the global Internet.

DCB offers dial-up and dial-on-demand routers to connectthe remote office that needs occasional access to the headquar-ters LAN. Using our dial-up router lets your home or portablePC act as a remote node or unit on your office LAN. Thisequipment is straight forward to setup and easy to operate.

DCB LAN Connectivity Solutions

Remote LAN Connections: An Overview

Another unique DCB connectivity solution involves routingLAN information through our statistical multiplexers. In manysituations, LAN interconnections are needed only for electronicmail and casual file transfer. You don’t have to install a high

speed dedicated phone line or pay additional long distancerates for this connection. If you’re already supporting remoteterminal users with a DCB multiplexer, we can supply aremote router that works through your existing multiplexer.

One DCB Unique Solution

9800.432.2638

LAN

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MAJOR NETWORK Central Site With Many Remote Offices

COMMON NETWORK Central Site With One to Two Remote Offices

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TELCO

UNIQUE SOLUTIONRunning Light LAN Traffic Through DCB Multiplexer

TELCO

TELCO

10 800.432.2638

F E A T U R E B E N E F I T

4 to 152 Ports Scaleable

Password Protection Security & Confidentiality

Two or More Input (Controlling) Ports Local And Remote Access

English Language Commands Easier to Use

Replaceable Software Cartridge Future-Proof

RJ45 RS-232 Ports Compact, Economical

Remote Control via Modem Eliminates On-site Visits

Control Many Ports, Machines Save Phone Line Costs

Features and Benefits of the DCB Access Switch

RS-232 ACCESS SOLUTIONS

Network Management and the DCB Access SwitchMost of your network cost starts the day after the network isinstalled. Along with circuit charges, network managementand maintenance make up over 80% of your total networkcost. You can minimize these costs by planning for networkmaintenance and troubleshooting when you design the system.Our Access Switch lets you access the management port on allnetwork equipment for troubleshooting and configuration…either locally or remotely. Within the limits of your security,our technician can even dial into the system remotely whileyou’re accessing it with a local terminal.

The DCB Access Switch connects two to six workstations(local or remote) to as many as 152 RS-232 devices. These are usually the management ports of DSU’s, modems, multiplexers, and routers. You no longer need a tangle ofpatch cables and hours to troubleshoot your network. Most DCB equipment has built-in diagnostics and troubleshooting/training features, so using the Access Switch to capture a remote port or troubleshoot a phone line saves hours of down time.

The DCB Access Switch allows a local or remote terminal toeasily connect to multiple RS-232 devices. It is commonlyused for management or configuration ports on all kinds ofequipment such as servers, routers, hubs, UPSs, channelbanks, transmitters, multiplexers, dial-in servers, voice-mail,ATMs, and PBX systems. All DCB Access Switch modelssupport at least two input (or controlling) ports. One port is

usually connected to a local terminal (or PC). The other portis left connected to a modem for remote access. Both ports canbe active at the same time if they are accessing different output(controlled) ports. Access Switches provide a way for remotetechnicians to diagnose and reconfigure equipment withoutthe expense of on-site visits.

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or Terminal

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Any RS-232 DevicesAccess

Switch

Manage multiple devices either locally or remotely

at the same time.

Connect as many as 152 different managed devices with up to 6 management workstations or modems.

11800.432.2638

The Access Switch is an ideal addition to small remoteoffice LAN systems. By enabling remote access to allLAN equipment (such as file server, hub, DSU, androuter), on-site visits for reconfiguration and problemdiagnosis are minimized. This example system supportsa small office of about 12 employees that is connected tothe corporate office with a 56 Kbps DDS line. Remoteaccess to the Novell file server is with RCONSOLE.Wiring problems are diagnosed by connecting to the intelligent hub. WAN problems are solved by connecting to the DSU or router. By adding an AC power control module, the server can even be power-cycled if it hangs.

The DCB Access Switch in Remote Offices

Many of our Access Switches end up buried in large equipmentracks along with dial-in modem racks, ISP remote offices, PBXsystems, and server farms. An example of this type of installa-tion would be an ISP remote office containing several Internetservers, twenty or more dial-in modems, multi-port routers, anda T1 channel bank or two. Another common example would bea data center with five or ten dial-in modems for a mainframesystem, along with DDS and frame relay lines to remote offices.Responding to client calls or SNMP traps, network managementtechnicians access LAN switching equipment, WAN terminalequipment, and the equipment at remote offices without leavingthe desk. This translates to more up-time and lower supportcosts.

The DCB Access Switch and ISP or Data Centers

UPS

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Novell Server

Router

AC Power Control

Ethernet Hub

FT1 DSU

Access Switch

Manage multiple devices remotely.

Connect as many as 152 different managed devices with up to 6 management workstations or modems.

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67

89 10

BR-AS Router

Router

DSU

Modems

Access Switch

Router

Server

UPS

19” Rack

SNMP is by far the most popular management method forLAN-based equipment. It offers great functionality, low cost,and it’s easy to learn. Every medium to large LAN/WAN canbenefit from SNMP management. But, SNMP has one majorproblem that is easily solved with the DCB Access Switch.When the system goes down, there is no SNMP managementavailable! An out-of-band management method is also needed.The DCB Access Switch provides this out-of-band manage-ment by using the RS-232 management/configuration portsfound on all managed equipment. By using a modem on oneof the Access Switch input ports, there is a remote diagnosisand configuration path to all your equipment. AC power con-trol options allow remote rebooting and power cycle of hungequipment. Although the Access Switch sometimes takes theplace of more complicated SNMP management workstations

SNMP And Out-of-Band ManagementMODEL INPUTS OUTPUTS

AS-04 2 4AS-08 2 8AS-16 2 16AS-24 2 24AS-32 2 32

AS-24M 6 24AS-32S – 32RPC-01 1 AC

and software, it is frequently used to supplement it. If you areusing SNMP, ask yourself... “When the WAN goes down, howdo I reach out and touch the remote equipment?” The DCBAccess Switch is the answer.

12 800.432.2638

INTERNET CONNECTIVITY SOLUTIONS

Whether it’s for technical research, electronic mail, education,or opening a new market area, the global Internet is one resourceyou must consider. Companies, schools, and individuals world-wide are finding that they can conduct business better, faster,and easier by using the Internet. Unlike popular belief, theInternet is not a single huge network, it’s a well connectedgroup of many networks that agree to abide by common rules.Internet connections can be as simple as a terminal and modemat your site used to access a “shell” account on your InternetService Provider (ISP); or as complex as a complete, securesystem that allows every PC on your network to have access tothe World Wide Web. The World Wide Web is today’s easiest

way for non-technical people to use the Internet. You can evenset up shop marketing your services and products on the Internet.You “get connected” by selecting the proper mix of software,services and hardware for your unique situation. The hardwaremay include any combinaton of a router, modem, DSU, firewall,server, workstation, or simply a PC. You may already have aLAN; it can be connected to allow access to the Internet foryour whole office. The most common services are provided by either an Internet Service Provider (ISP) or CommercialInformation Service (such as America On Line or Compuserve).They may go by names such as ftp, telnet, www, archie, gopher,netnews, usenet, shell accounts, or the web.

As your full service data communications provider, DCB willhelp you connect to the Internet with minimum trouble. Wecan assist you in selecting the proper combination of hardware,software, and services for your unique needs. DCB’s line ofrouter equipment is ideal for connecting your LAN to theInternet. We can provide a router or security firewall; thenassist you in selecting the proper ISP or Commercial Information Service. As a Sun authorized Netra dealer, we can help you set up to sell your products or services on the Internet. Take advantage of our experience using Frame Relay, ISDN, and other technology options to save time and money.

DCB Internet Solutions

DSU/CSU

Internet Firewall Router

Router

To Your LAN Users

Internet Server ¥ E-mail Server ¥ File Transfer ¥ World Wide Web ¥ Net News

To Your Internet Service Provider

Ifyou’re just starting out and wondering if Internet access would be beneficial to your organization, we suggest you try oneof the online commercial information services such as Compuserve Information Service or America On Line. These are mucheasier to navigate than the Internet, yet have many of the same advantages of electronic mail, discussion groups, and informationavailability. You need only a PC and modem to access these services. If you feel the need to jump into the Internet and haveonly a PC to work with, several Internet Service Providers now offer user friendly and inexpensive packages. Call our TechSupport group for free advice!

Internet Overview

13800.432.2638

TERMINAL SERVER SOLUTIONS

SR Mux

PCs or Terminals

DSUSR Mux

PCs or Terminals

Modem or DSU

SR Mux

PCs or Terminals

DSU

TELCO, DDS, Frame Relay

Modem or DSU

UNImux

SCSI

IBM RS-6000

UNImuxUNIMUX IS A REMOTE MULTIPLEXER TERMINAL SERVER FOR THE IBM RS-6000 UNIX PLATFORM.

The UNImux saves wiring, host slots and space. It combinesthe async port I/O and multiplexer functions in a single pieceof equipment. The UNImux is connected to the Host via SCSIand up to 7 UNImuxes can be connected to a single SCSI adapter.

The UNImux saves wiring by eliminating the need forhost I/O devices and cabling to Multiplexers. It saves host

slots because up to 7 UNImuxes can be connected to a singleSCSI adapter. UNImux saves space because one piece ofequipment takes the place of several.

UNImux can be used in Point-to-Point applications and options are available for Multi-Point and Frame Relay configurations.

ISDNMost DCB multiplexers, access switches, and routers are compatible with ISDN (Integrated Services, Digital Network),one of the latest offerings from your telephone company. Themost common ISDN service, the basic rate (BRI), provides two64 Kbps channels or one 128Kbps channel for data connections.This is a switched service similar to your standard telephoneinstead of a full-time dedicated connection. Normally, an ISDNconnection device (Terminal Adapter or TA) dials the numberof the unit you want to connect to... and disconnects when notin use. Unfortunately, in most areas this service is metered…you pay by the minute for each minute you are connected. Inother areas, flat rate service is offered and Centrex (non-metered)

service is commonly available. Your phone company can pro-vide cost details. ISDN can be complex to obtain since thereare many conflicting options that must be specified. DCBsupport can assist you in ordering your ISDN connections.

Our “One-Touch” multiplexer system works well withISDN. In a “One-Touch” system, simply pressing the spacebar or return key on a remote terminal or PC causes the systemto automatically connect to the host computer. After a presetperiod of inactivity, the link is broken. When using ISDN,“One-Touch” will make a connection in about a second,instead of the normal 30-60 seconds required for a modemconnection.

14 800.432.2638

VOICE/DATA INTEGRATION SOLUTIONS

T1 ACCESS MULTIPLEXER SOLUTIONS

19.2 or 38.4 Kbps

16 or 32 Kbps Voice

Phone, PBX or Key System 2 wire or 4 wire

FXS, FXO or E&M

DV-1D

56 Kbps Link

DV-1D

19.2 or 38.4 Kbps

16 or 32 Kbps Voice

Phone, PBX or Key System 2 wire or 4 wire

FXS, FXO or E&M

Remote Offices

1.544 Mbps

Fractional T1

56 Kbps

Voice

Up to 24 Channels of: ¥ Voice ¥ Video (up to 24 channels) ¥ LAN Routers/Bridges

TELCO Network

The DV-1D allows voice and data to share a single 56 Kbps dataline. One voice channel for a telephone, PBX or Key System canshare the line with a data channel for multiplexers, LAN traffic or other data application. If your needs are for more voice or datachannels, DCB also has those solutions available.

When you have multiple data and voice lines,many times you can save recurring costs bycombining those lines into a high speed T1line. DCB offers equipment for combining all your different communications needs intoa T1 line.

Voice/Data Integration

Channel Banks

Sonet / OC-1

The system supports an unlimited

number of nodes

1 Pair of Fiber Cables

Up to 40 Km at OC-1 speed

Ethernet Backbone

Video

RS-232/485/422 Devices

Analog Phones FXS/FXO

MUXLAN

MUXLAN

MUXLAN

T1 Channel Bank

MUXLAN

MUXLAN

Point-to-Point MUXLAN System

SONET / OC-1 MUXLAN System

15800.432.2638

HIGH SPEED FIBER OPTIC SOLUTIONSNow you can consolidate all your data and voice transport re-quirements onto one pair of fiber optic cables. With SONET/MUXLAN, one pair of fiber carries ethernet, T1 channels,analog phone channels, RS-232/485/422 data, and video up to 40 Km. By running this backbone at OC-1 speeds, you canuse 850 nm or 1300 nm fiber, any common connector, and theadvantage of counter-rotating SONET type loops without theOC-3 cost.

Many buildings and campus environments have installedfiber optic cables that carry only one 10 Mbps ethernet channelper cable pair. We can increase this to 51.84 Mbps SONETOC-1 speeds and economically add additional ethernet or otherdata, voice, or video channels without replacing the cable. Thereare over 40 protocols and interfaces to choose from.

DCB SERVICESAlthough you always get free DCB SuperService Support with all DCB products, we have additional services that mayinterest you. We can often help you save long term project

expenses by investing a little more up front in planning, training,and installation. You can also lease DCB equipment or rent itfor the short-term.

Consulting and PlanningIn addition to the free SuperService Support assistance, ourexperts can help plan and implement your major data com-munications projects. Expertise is available in all wide areanetworking technologies. We’ve worked with most popularsystems such as UNIX from IBM, HP, and Sun; and LANsusing Netware and Lantastic. We’ve connected WANs to all

major mainframe and mini computers. We consult on band-width requirements, WAN architecture decisions, voice/dataintegration, wireless networking, economic and technicalanalysis. We can manage the entire project or just supply thetechnical expertise needed to help you make the best decisions.These services are available on an hourly fee or bid basis.

Installation and Product TrainingOur technicians can install DCB products at your local andremote sites. We implement entire projects from the wiring tothe turn-on or just install DCB products as a subcontractor to

your local supplier. We also provide training for your technical(and non-technical) people. Proper training helps minimize on-going network expenses and maximize reliability and uptime.

16 800.432.2638

INSTALLATION EXAMPLE

Host, concentrator or terminal server

SR Multiplexer

DSU or modem

Patch panel

Local Devices

Line cord

Category 5 Solid

copper 4-pair

in-house wiring

CPU cables

Line cord

TELCO

Host End

■ Save labor and increase reliability with easy-to-use wiring devices.

■ For best performance, limit the number of wiring transitions.

■ We recommend using all Category 5 wiring.

■ Wiring within walls should be straight through and conform toEIA/TIA 568 specifications.

Wiring Notes and Recommendations■ If possible, wiring modifications should be made only

in modular adapters.

■ DCB cables are color-coded for easy identification.

■ Label all lines, and keep the labels up-to-date.

■ Maintain thorough system documentation.

17800.432.2638

SR Multiplexer

DSU or modem

Wall plate

Category 5 solid copper

4-pair in-house wiring

Distribution box

Line cord

Line cord

Line cord

Terminal

PC

Printer

Line cords

Remote End

18 800.432.2638

SR Multiplexer — Point-to-Point

■ Point-to-Point FrameRelay

■ Ports to 38,400 bps■ Composite to 128 Kbps■ Network Management Port

The DCB SR Frame RelayMultiplexer concentrates 4, 8,16, 24 or 32 async ports to asingle point-to-point FrameRelay link. Ports use RJ-45connectors.

■ Frame Relay Remote■ Ports to 38,400 bps■ Composite to 128 Kbps■ Network Management Port

The DCB SR Frame RelayRemote Multiplexer is 4, 8, 16,24 or 32 ports. The SR is usedat remote sites on a point-to-multipoint Frame Relay link.Ports use RJ-45 connectors.

SR Multiplexer — Multipoint Remote

DL-DSU/CSU

■ Network Management Port■ LCD front panel for setup

and diagnostics■ Point-to-point or multi-

point

The DCB DL DSU/CSU is a cost-effective DSU/CSU for56, 19.2 and 9.6 Kbps digitalfacilities. It will operate eitherpoint-to-point or multi-point.The DL DSU/CSU can also beused in line driver mode overcustomer-owned cable.

SRX Multiplexer — Multipoint Host

■ Frame Relay Host■ Ports to 38,400 bps■ Composite to 128 Kbps■ Network Management Port

The DCB SRX Frame RelayHost Multiplexer concentrates8, 16, 24 or 32 async ports to a point-to-multipoint FrameRelay link with up to 16 remoteSR multiplexers. Ports use RJ-45 connectors.

MSU-4D — Multihost Sharing Unit

■ 4 port multihost sharing■ Used in multihost

applications■ Speeds to 128 Kbps

The Bicom MSU-4D allowsmultiple SRX Host Multiplexersto share a single Frame Relaylink. It can also be used atremote sites for multiple SRMultiplexers.

DL-56

■ 56 Kbps■ Point-to-point■ Multi-point■ Line Driver Mode■ Async Version

The DCB DL-56 DSU/CSU is a 56 Kbps only DSU/CSUwithout network management.For simple, low cost applications,the DL-56 is the DSU/CSU ofchoice. Also available in an RS-232 only and async version.

Frame Relay

Digital Service Units

19800.432.2638

FR-P01

■ Composite to 768 Kbps■ Async or sync port■ Network Management Port■ Multiple Sync Protocols

The DCB FR-P01 serial portsupports SDLC, Burroughspoll-select, bit sync and otherprotocols. A second serial portis used for configuration andstatus monitoring.

■ Composite to 128 Kbps■ 4 sync HDLC or async

ports■ LCD display and keypad■ RS-232 or V.35

The DCB FR-04 is an econo-mical 4 port FRAD for lighttraffic applications. A frontpanel LCD display and keypadare used for configuration andstatus monitoring.

FR-04

FR-E

■ Composite to T1■ 1 ethernet port■ Network Management Port■ IP and IPX supported

The DCB FR-E is an ethernetattached FRAD with built inrouting functions. IPX routingis dynamic. IP routing is static.

FR-02

■ Composite to 128 Kbps■ 2 sync HDLC or async ports■ LCD display and keypad■ RS-232 or V.35

The DCB FR-02 is an eco-nomical 2 port Frame RelayAccess Device (FRAD) forlight traffic applications. Afront panel LCD display andkeypad are used for configura-tion and status monitoring.

FR-P04

■ Composite to 768 Kbps■ 4 async or sync ports■ Network Management Port■ Multiple Sync Protocols

The DCB FR-P04 serial portssupport SDLC, Burroughs poll-select, bit sync and otherprotocols. A serial port is usedfor configuration and statusmonitoring.

FR-E03

■ Composite to T1■ 1 ethernet port■ 3 async or sync ports■ Multiple protocols

The DCB FR-E03 is an ether-net attached FRAD with rout-ing functions and 3 serial ports.Routing of IPX is dynamic andIP is static. SDLC, Burroughspoll-select, bit sync and otherprotocols are supported.

Frame Relay

20 800.432.2638

M U L T I D R O P

SR Multiplexer

■ Point-to-Point■ Ports to 38,400 bps■ Composite to 128 Kbps■ Network Management Port

The DCB SR Multiplexer concentrates 4, 8, 16, 24 or 32async ports on a point-to-pointlink. The composite is synchro-nous. Ports use RJ-45 connectors.

■ Multidrop Remote■ Ports to 19,200 bps■ Composite to 64 Kbps■ Network Management Port

The DCB SPL MultidropRemote Multiplexer is 2, 4, 6, 8, 10, 12 or 14 ports. TheSPL is used at remote sites on a multidrop link. Ports use DB-25 connectors.

SPL Multiplexer — Multidrop Remote

LL Modem

■ V.33 and V.29 compatible■ LCD display■ Sync or async■ Rack mounts in DCB MR-8■ Network Management Port

The LL 14.4 modem operatesat 14,400 bps or 9600 bps syn-chronous or asynchronous. Ituses 4-wire unconditionedleased lines. The DCB PL 19.2 modem is available foranalog 4-wire leased lines.

SRX Multiplexer — Multidrop Host

■ Multidrop Host■ Ports to 38,400 bps■ Composite to 128 Kbps■ Network Management Port

The DCB SRX MultidropHost Multiplexer concentrates8, 16, 24 or 32 async ports on amultidrop link with up to 32remote SPL multiplexers. Portsuse RJ-45 connectors.

SPL Multiplexer

■ Point-to-point■ Async or sync composite■ Dial-up or leased line■ Network Management Port

The DCB SPL Multiplexer isavailable in 2, 4, 6, 8, 10, 12 or14 ports. It can be used onleased analog or digital lines orwith dial-up modems.“AT”dialing commands are enteredat the attached terminal.

RS-232 to V.35 Interface Converter

The DCB VRC-1 is an RS-232to V.35 interface converter,ideal for use with the DCB SRand SPL series multiplexers.Other equipment that may beconverted includes terminals,personal computers, bridges,routers, work stations, etc.

P O I N T - T O - P O I N T

Multiplexers

Modems Interface

■ Easy to install■ Speeds to 192 Kbps■ DB-25 RS-232 connector,

M34 connector for V.35■ No switches to set■ Connects RS-232 DTE to

V.35 DCE

21800.432.2638

TM-24

■ Common power and logicredundancy

■ Drop and insert■ Multiple voice card options■ Analog or digital data cards■ Fractional T1 cards

The DCB TM-24 T1 Multi-plexer is full featured and versa-tile. It can be configured as 2T1 muxes in a single 7” highchassis.

■ UNIX systems I/O■ SCSI attached■ 16 terminal/printer ports■ Up to seven 1016s on a

single SCSI adapter

The DCB 1016 is a SCSIatached I/O for UNIX systems.SCSI attached means less systemoverhead for terminal I/O. CallDCB about driver availabilityfor your UNIX operating systemversion.

1016

DV-1D

■ Voice/data DSU/CSU■ 16 or 32 Kbps voice■ 9.6, 19.2 or 38.4 Kbps data■ RS-232 and V.35 interface■ Dynamic bandwith

allocation

The DCB DV-1D is a 56/64Kbps DSU/CSU with one voiceand one data channel. A tele-phone, key system or PBX canbe used on the voice channel.The data channel is sync orasync.

UNImux

■ SCSI attached multiplexer■ Up to 32 channels■ Point-to-point or multi-point■ Frame Relay■ Network Management Port

The DCB UNImux attaches toa UNIX host via SCSI. CallDCB about driver availabilityfor your UNIX operating sys-tem version. UNImux combinessystem I/O, multiplexing and,in Frame Relay applications, theFRAD all in one box.

FT-DSU/CSU

■ Fractional T1 or T1DSU/CSU

■ 1, 2, or 4 ports■ Optional drop/insert, SNMP

The DCB FT-DSU/CSU is afractional T1, T1 DSU/CSUwith optional drop and insertinterface.

Access Switch

■ 4 to 152 ports■ 2 or 6 control ports■ Used to access network

management ports

The DCB Access Switch is anASCII character controlledswitcher used to connect controldevices to 4 to 152 async net-work management ports.

Terminal Servers

Voice/Data Access

T1

22 800.432.2638

BR-SXT01

■ WAN port to 2 Mpbs Sync■ WAN port to 256 Kbps

sync or async■ AUI, BNC and 10BaseT

connectors■ PPP and Frame Relay■ SNMP, Telnet or Async

Management■ TCP/IP or Multiprotocol

versions

The DCB BR-SXT01 is a 1 WANport router with a secondary WANport. The secondary WAN portcan be used for automatic switch-over and dial-on-demand in caseof primary link failure. The multi-protocol version routes TCP/IP,IPX, AppleTalk and DECnet.

■ 12 WAN ports to 256Kbpseach

■ Async or Sync■ AUI, BNC and 10BaseT

connectors■ PPP and Frame Relay■ SNMP, Telnet or Async

Management■ TCP/IP or Multiprotocol

versions

The DCB BR-AS12 is a 12WAN port router. Individualports can be configured for auto-matic switchover if a primarylink fails. It can support up to64 Frame Relay DLCIs. Themultiprotocol version routesTCP/IP, IPX, AppleTalk andDECnet.

BR-AS12

BR-AS01

■ 1 WAN port to 128 Kbps■ Async or Sync■ AUI, BNC and 10BaseT

connectors■ PPP and Frame Relay■ SNMP, Telnet or Async

Management■ TCP/IP or Multiprotocol

versions

The DCB BR-AS01 is an inex-pensive full featured router. Themultiprotocol version routesTCP/IP, IPX, Appletalk andDECnet. The IP version is perfect for connection to theInternet, and includes packetfiltering.

ES-06 Ethernet Switch

■ Sx 10/100 Mbps Ports■ 148,800 PPS in 100 Megabit

Mode■ 14,880 PPS in 10 Megabit

Mode■ Non-blocking, Crossbar

Switching

Switching hub with six fullduplex 10 or 100 Megabit ports.Each port is auto-negotiated for 10 or 100 Mbps to add theadvantages of ethernet switchingto your LAN.

EA

■ ISA and PCI versions■ BNC, UTP and AUI

combinations■ 10 Mbps and 100 Mbps

versions■ NE-2000 compatible

The DCB EA Ethernet Adaptersare available in a wide variety tomeet your exact needs. Thereare ISA and PCI versions withBNC and UTP or BNC, UTPand AUI connectors.

LAN Routers

EH-08, 12, 16 or 24

■ Small size – 1” high■ Auto partitioning■ Low power consumption■ Individual port LEDs

The DCB EH ethernet hubsare small in size but big in per-formance. UTP port connectorswith BNC/AUI network con-nectors. These hubs won’t takeup much room or much of yourbudget.

LAN Hubs Ethernet Adapters

23800.432.2638

SW 890/990Unlicensed Microwave 10Mbps

■ Full Ethernet Speed■ Unlicensed■ 890 Range is 1000’ (9” dish)■ 990 Range is 1/2 Mile

(2’ dish)■ 24 Ghz Microwave

You can now get full ethernetspeed on an unlicensed system.The 890/990 are easy to installwith no tuning and operate incongested areas to provide aneconomical alternative to fulllicensed microwave.

Proxim Range LAN/Access Point■ Up to 500 ft in

offices■ Up to 1000 ft in

open space■ 10BaseT, 10Base2■ 1.6 Mbps per

channel

The Range LAN/AccessPoint is a wireless localbridge for ethernet net-works. Users can roamfrom one access point toanother without losingtheir network connection.

SW 23 GHz Microwave Link

■ Speeds to 10 Mbps & T1■ Models with up to 4 T1s■ Easy installation and

maintenance■ 10 mile typical range■ Licensed 23 GHz frequency

Gina Series Radio Modem

Wireless WAN

Wireless LAN

The 23 GHz microwave links operatefrom 100 ft to 10 miles using 9", 2' or4' dish antennae. Connect two LANsand PBX systems with full duplex 20Mbps plus T1, or use the single T1model. Works with routers, bridges,hubs or 4-wire T1 interfaces.

■ Speeds to 64 Kbps Sync, 38.4Kbps Async

■ Point-to-Point or MultiPoint■ 2.4 Ghz or 900 Mhz models■ License-Free Spread-

Spectrum■ FCC and DOC approved

This radio modem supports re-mote terminals, multiplexers andLAN routers with a line of sightrange up to 12 miles. Quick set-up, license free replacement forleased data circuits. Repeateroperation allows longer distance.

Proxim Range LAN 2

■ Wireless connection toRange LAN/Access Point

■ PCMCIA Type II Slot■ ISA bus■ Low power

The Range LAN 2 PCMCIAand ISA adapters allow portableand desktop computers LANconnectivity without wiringproblems.

■ Up to 3 miles line of sight■ T-1 speed■ 10BaseT, 10Base2■ No FCC license required

The Proxim Range Link usesspread spectrum radio technologyfor secure and reliable wirelesscommunications for up to 3 miles,line of sight. The Range Linkcan pay for itself in communica-tion line savings very quickly.

Proxim Range Link

24 800.432.2638

CABLE AND WIRING HARDWARE

■ LINE CORDSCategory 5 line cords are now recom-mended for all applications. Wiredstraight thru RJ-45. Color-codedcables “neaten up” your wiring andmake troubleshooting easier. Specialtransition cables are used for someapplications.

RJ-45: 2', 7', 14', 25', BulkAvailable in colors: Black, Red, BlueGreen, Yellow and GrayBNC: 2', 7', 14', 25', BulkST (fiber): 2', 7', 14', 25', Bulk

■ SPECIALTY CABLESWe create cables with special pinouts,connectors and lengths for your specific equipment.

■ IN-HOUSE WIRING EQUIPMENTPatch panels, RJ-45 jacks (both singleand multiple), cable ties and distribu-tion boxes.

■ ADAPTERSUsed for transition from DB-25 orDE-9 connectors to RJ-45 cables. Wealso carry gender changers and LANcable hardware.

■ RELAY RACKRecommended for rack mounting multiplexers, modems, DSUs, patch panels, terminal servers,routers, etc. at the host end. Stable19" by 72" high rack.

■ WE ALSO CARRY…• Modem eliminators to 16 Mbps• Line drivers• Rack chassis, shelves• Custom cables, adapters• Tools and test equipment• A/B switches• LAN accessories

19"

■ IN-HOUSE WIRING CABLESolid, UTP, 4-pair Category 5 copperfor all in-house Multiplexer and10BaseT wiring. Fiber or 10Base2 iscommonly used for backbones. UseFiber to run LANs between buildings.All are available in bulk lengths.

■ LAN TRANSCEIVERSConnect between the AUI port onLAN devices and the LAN cable.

10BaseT – RJ-4510Base2 – BNC10BaseF – Fiber ST

■ SURGE PROTECTORSHelp prevent lightning and powertransient damage to RS-232 equip-ment. DB-25, RJ-45

■ T-EXTENDER6000 foot T-1 line repeater.

■ VRC-1RS-232 to V.35 AC powered inter-face converter.

217.352.3207 800.432.2638 FAX 217.352.0350

Installing a wireless link between two LAN locations usinglicense-free spread spectrum radio modems from DCB.

Installing a wireless link between remote terminals and a localhost using license-free spread spectrum radio modems from DCB.

This example illustrates low-cost license-free, spread-spectrum radio modems. Other available configurations provide speeds upto 10 Mbps (full duplex ethernet!) as well as T1 for additional voice circuits. Pricing begins at about $2,400 for a pair of radiosand antennae and $1,000 each for routers. If you’re paying $200 or more per month for a phone line, the payback is a year or lesswith no monthly phone bills!

Terminals or PCs are connected to a remote host computer using DCB multiplexers and wireless links. Economical spread spec-trum radio modems connect multiplexers and terminals at up to 1.5 Mbps. By using our microwave systems, multiple T1 lines areavailable with multiple data and voice channels.

1

Ethernet

Link

WANPolarity

23

45

67

89 10

BR-AS Router

1

Ethernet

Link

WANPolarity

23

45

67

89 10

BR-AS Router

ServerPC

PC

PC

PC

PC

LAN Routers running 64 Kbps or faster.

Server

PC

Radio Modem

Radio Modem

Radio Link

BR-ASX-01 Router

Main Ethernet LAN With One Server

Remote Office LAN With Server Or Locally

Loaded Software

BR-ASX-01 Router

PC

PC

PC

PC

Distances of 12 miles or more are available using license-free or licensed radio modems.

Use our microwave equipment for greater range.

Multiple RS-232 terminal connections

Distances of 12 miles or more are available using license-free or licensed radio modems.

Use our microwave equipment for greater range.

Each SR Multiplexer supports up to 32 terminals

Host Computer

SR Multiplexer

SR Multiplexer

Terminals

Radio Modem

Radio Modem

Radio Link

Data Comm for Business, Inc.807 Pioneer

Champaign, IL 61820

VOICE (217) 352-3207(800) 432-2638

FAX (217) 352-0350EMAIL info@dcbnet.com

WEB http://www.dcbnet.com

Data Comm for Business, Inc.807 PioneerChampaign, IL 61820

Bulk RateU. S. Postage

PAIDPermit No. 893Champaign, IL