IBM 1PA Operating manual

7299 Express Family Multiplexers
and Hubs for AS/400 IBM
Planning, Installation,
and Maintenance Guide
S05J-3355-01

7299 Express Family Multiplexers
and Hubs for AS/400 IBM
Planning, Installation,
and Maintenance Guide
S05J-3355-01

Note!
Before using this information and the product it supports, be sure to read the safety information in the booklet provided with
this product and the general information under Appendix B, “Notices.”
For information about technical support, see Appendix A, “Technical Support.”
Second Edition (October 1998)
This is a revision of, and obsoletes, S05J-3355-00.
This edition applies to the IBM 7299 Express Products for AS/400 and to all subsequent releases and modifications until otherwise
indicated in new editions. Make sure you are using the correct edition for this product.
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Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
About This Book .................................... vii
How This Book Is Organized ............................. vii
Related Books . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Quick Installation Guide ................................ ix
To install the 7299 Hub: ................................ ix
To install the 7299 Multiplexer: ............................. ix
Part 1. Planning, Installation, and Maintenance
Chapter 1. Introducing the IBM 7299 Multiplexer, Express Hub, and Entry
Hub for AS/400 .................................... 1-1
The 5250 Express Data Stream ........................... 1-3
Product Highlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
7299 Passive Hubs ................................. 1-6
7299 Active Hubs .................................. 1-7
7299 Multiplexers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Key Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Software Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Operating Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Chapter 2. Planning Your Installation ...................... 2-1
Laying Out Your Installation .............................. 2-1
Cable Run Lengths ................................. 2-1
Planning for a Ring or Point-to-Point Configuration ................ 2-2
Filling Out the 7299 Multiplexer Worksheet ................... 2-2
Describing the Physical Layout of the Fiber Optics ................ 2-6
Physical Ring Layout ................................ 2-6
Physical Star Layout ................................ 2-7
Maximum Cable Lengths ............................... 2-8
Maximum Number of Devices ............................ 2-9
Determining Whether to Use Existing Cabling ................... 2-9
Walk-Through Site Inspection Checklist ....................... 2-9
Connecting the Hub to the Host .......................... 2-14
Using a Remote Control Unit .......................... 2-14
Using 6299 Multiplexers ............................. 2-15
Connecting Devices to the Hub ........................... 2-15
Connecting the Multiplexer to the Host ...................... 2-15
Using the WSC to 7299 Multiplexer Direct Connect Cable ......... 2-16
Using Baluns Attached to a Twinax Breakout Box .............. 2-16
Using a Remote Control Unit .......................... 2-16
Connecting Devices to the Multiplexer ....................... 2-17
Baluns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Contents iii

Chapter 3. Installing the 7299 ........................... 3-1
Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Unpacking the 7299 .................................. 3-1
Installing Baluns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Installing the 7299 Hub ................................ 3-2
Changing the Hub Polarity and Pinout Jumpers ................ 3-3
Installing the 7299 Multiplexer ............................ 3-5
Changing the Multiplexer Jumpers for Connector and Pinouts ........ 3-7
Installing the 7299-2EN Upgrade Kit ......................... 3-8
Chapter 4. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Symptoms and Solutions ............................... 4-1
A Device Is Down or Unstable ........................... 4-1
A Device Is Intermittent ............................... 4-2
Two Devices Interfere with Each Other ..................... 4-3
Devices Are Not Running in 2 Mbps Mode ................... 4-3
All Devices Are Down ................................ 4-4
Multiplexer Fiber Optic Link Cannot Get “Receive” LED On .......... 4-5
Devices Connected Via Multiplexer Get Parity Errors or Terminal
Connections Are Unstable ............................ 4-5
Verification Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Debugging the 7299 .................................. 4-7
Models 2EN, 2EX, and 2FX ............................ 4-7
Models 1PA and 2PA ................................ 4-8
Model 8MX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Debugging the 7299 Cabling ............................. 4-9
Potential Problem Areas ............................... 4-12
Power Receptacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
AC or DC Voltage on Twisted-Pair Wires ................... 4-13
Wire Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Measured Wire Resistance Length versus Electrical Length ........ 4-13
Characteristic Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Impedance Discontinuities . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Part 2. Reference
Chapter 5. Midrange Device Connectivity .................... 5-1
System/36 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
System/38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
AS/400 Version 1 .................................... 5-2
AS/400 Version 2 .................................... 5-3
AS/400 F Series .................................... 5-4
AS/400 Advanced Series ............................... 5-5
Chapter 6. Cables and Baluns ........................... 6-1
Cabling Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
RJ Connector Standards ............................... 6-3
DB25 Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Fiber Optic Conventions and Standards ..................... 6-5
Patch Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Balun Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
iv Planning, Installation, and Maintenance Guide

Chapter 7. Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
7299 Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Compatible 6299 Features .............................. 7-2
Baluns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Field Replaceable Units ................................ 7-4
Part 3. Appendixes
Appendix A. Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Phone Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Don't Know Your AS/400 Customer Number ? .................. A-1
WWW Internet Support ............................... A-2
BBS/FTP Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Appendix B. Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Classification of LED Transmitter Device ..................... B-1
Electronic Emission Notices ............................. B-1
Statement of Limited Warranty ........................... B-3
Security, Auditability, and Control ......................... B-4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-1
Contents v

vi Planning, Installation, and Maintenance Guide

Preface
The IBM 7299 Express Products for AS/400 lets you use low-cost twisted-pair
cabling to connect devices to an AS/400, System/38, or System/36 host. When
using the 5250 Express Data Stream, the 7299 can increase the throughput to IBM
5250 Express adapters by nearly four times. For a detailed description of the 7299,
see Chapter 1, “Introducing the IBM 7299 Multiplexer, Express Hub, and Entry Hub
for AS/400.”
About This Book Important
Before installing the 7299, read the Safety Information booklet that was
provided with the product and Appendix B, “Notices” on page B-1.
This book documents the following IBM 7299 Express Products for AS/400
products:
Model 1PA
Model 2PA
Model 2EX
Model 2FX
Model 2EN
Model 8MX
Model 2EN Upgrade Kit
These products are described in Chapter 1, “Introducing the IBM 7299 Multiplexer,
Express Hub, and Entry Hub for AS/400.”
This book provides information for people who:
Plan for the implementation of 7299s
Install a 7299
Troubleshoot 7299 installations
To use the planning, installation, and troubleshooting directions in this book, a
working knowledge of the following related topics is necessary:
Host operating systems
Twinax cabling
Devices that you are connecting
Troubleshooting methodology
How This Book Is Organized
This book is divided into the following parts:
Part 1: Planning, installation, and troubleshooting directions (For abbreviated
installation instructions, see “Quick Installation Guide” on page ix.)
Part 2: Reference information, including background and ordering information
Part 3: Technical support, warranty, notices, and trademark information
Preface vii

This book provides:
An overview of the 7299
Information for planning your 7299 solution
Site qualification, wiring, and reference information
Product descriptions, specifications, and setup procedures
Troubleshooting procedures
Parts and FRU ordering information
This book also includes a glossary.
Related Books For troubleshooting and ordering information for 6299 products, such as the UTP
Distribution Block and multiplexers, see IBM 6299 Midrange Hub Planning,
Installation, and Maintenance Guide (G571-0362).
For information about how many device addresses are required for workstations
that are running the 5250 Express Program, see IBM 5250 Express Program User’s
Guide (G570-2221).
To order these publications, contact your IBM Authorized Dealer or IBM Marketing
Representative.
viii Planning, Installation, and Maintenance Guide

Quick Installation Guide
Important
Before installing the 7299, read the Safety Information booklet that was
provided with the product and Appendix B, “Notices” on page B-1.
This section provides an overview of how to install an IBM 7299 Express Products
for AS/400. For detailed planning, installation, and maintenance directions, see
Part 1.
To install the 7299 Hub:
1. Verify the pinout settings for host connectivity.
2. If you are installing a model 2PA, 2EX, 2FX, or 2EN, rack mount the device.
Note: If you are installing a model 1PA, you can wall mount the hub.
3. Connect each device to one of the RJ device jacks using straight-wired
twisted-pair cabling. For 2 Mbps mode, Category 5 cabling or better is
recommended.
4. Attach the UTP cable from the workstation controller (WSC) port to the 7299.
5. In the white space above the RJ host connector, write the WSC and the port
number for the host connection.
6. Strain relief all the data cables firmly but do not crush them. Keep the data
cables away from the power cables.
7. If you are installing a model 2EX, 2EN, or 2FX, verify that the power cords are
firmly attached to the back of the 7299. Then, plug the AC power cord into the
power outlet.
When you power on a model 2EX, 2EN, or 2FX, a lamp test is performed.
Verify that all the LEDs light for about two seconds before fading to black.
8. Power on all the devices.
To install the 7299 Multiplexer:
1. Verify the pinout settings for host connectivity. Pins 4 and 5 are the default.
2. Verify that the “Point-to-Point/Ring Mode” switches are set correctly.
3. Verify that the “Host Multiplexer/Device Multiplexer” switches are set correctly.
4. Connect each Host WSC port to the Host 7299 Multiplexer at either the DB25
connector on back of the Multiplexer or the RJ jacks using straight-wired
twisted-pair cabling. Refer to “Connecting the Multiplexer to the Host” on
page 2-15. Set the jumpers inside the 7299 Multiplexer according to the
connector used and pinout used for your installation. Refer to “Changing the
Multiplexer Jumpers for Connector and Pinouts” on page 3-7. For 2 Mbps
mode, Category 5 cabling or better is recommended.
5. Connect each device to one of the RJ device jacks on the Device
Multiplexerusing straight-wired twisted-pair cabling.
Quick Installation Guide ix

Note: A device can be a 7299 Hub, a 6299 Hub, a multiple- or single-address
PC, or a terminal. For 2 Mbps mode, Category 5 cabling or better is
recommended. To document your configuration for the Host Multiplexer, write
the WSC and ports used by the DB25 connection above the DB25 connector,
This should match the pinout jumper settings you selected above and provides
information for future verification and changes.
To document your configuration for each Device Multiplexer, write the Host
WSC and ports provided by the DB25 connection above the DB25 connector.
This should match the pinout jumper settings you selected above and provides
information for future verification and changes.
6. Connect the fiber optic cables to each 7299 Multiplexer. Because the
Multiplexers are in different locations, be sure that you mark the cables for the
Multiplexer and connector (TX or RX) for easier connection.
7. Strain relief all the data cables firmly, but do not crush them. Keep the data
cables away from the power cables.
8. Verify that the power cords are firmly attached to the back of the 7299. Plug
the AC power cord into the power outlet.
When you power on the Multiplexer, a lamp test is performed. Verify that all
the LEDs light for about two seconds before fading to black.
9. Power on all the devices.
xPlanning, Installation, and Maintenance Guide

Part 1. Planning, Installation, and Maintenance
This section describes the 7299. It also provides directions for installing and
maintaining the 7299.
Chapter 1. Introducing the IBM 7299 Multiplexer, Express Hub, and Entry
Hub for AS/400 .................................... 1-1
Chapter 2. Planning Your Installation ...................... 2-1
Chapter 3. Installing the 7299 ........................... 3-1
Chapter 4. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Part 1. Planning, Installation, and Maintenance

Planning, Installation, and Maintenance Guide

Chapter 1. Introducing the IBM 7299 Multiplexer, Express
Hub, and Entry Hub for AS/400
The 7299s let you connect 5250-type devices to an AS/400, a System/38, or a
System/36 host using twisted-pair cabling. Twisted pair cabling costs about
one-fifth as much as twinaxial cabling, and it can be used for other voice and data
connections. Using twisted-pair cabling also provides a transition for migrating to
Ethernet** and Token Ring LANs.
The 7299 Multiplexer (Mux) works the same as the 6299 family with the following
additional functions:
Support for the AS/400 Advanced Workstation Controller's 2X data rate to all
ports at 2Mbps. For details, see “The 5250 Express Data Stream” on
page 1-3. The AS/400 Optimized Mode is passed unchanged by the 7299
Multiplexer.
Support for the AS/400 Advanced Workstation Controller's split polling feature.
This feature allows the workstation controller (WSC) to service ports two times
as often as previous WSCs. The 6299 supports only a single polling group of 8
ports whereas the 7299 Multiplexer supports two polling groups on the same
fiber.
Note: This permits choosing up to four ports from two different twinax WSC
polling groups (among WSC adapters from a single host or among WSC
adapters from two hosts).
Ring Distribution for remote terminals. The 6299 performs only a point-to-point
distribution (from the host to a single remote location). The 7299 Host
Multiplexer provides all input ports and all their addresses at each of up to
three Device Multiplexers. See Figure 2-3 on page 2-6. All seven addresses
from each port are available at each Device Multiplexer location. Address
conflicts are handled in the same way conflicts are found and resolved on
twinax.
You can connect the 7299 Multiplexer to the Host:
Directly to the WSC by using the Host-to-Multiplexer cable (P/N 05J4550) and
up to two additional extension cables (P/N 21F0075). Using these cables
allows the Multiplexer to be located between 30 to 80 feet from the host.
Directly to one or two 5X94 remote controllers with the DB9 Y-cable (P/N
05J4533) and the Host-to-Multiplexer cable (P/N 05J4550). You may use up to
two extension cables (P/N 21F0075). Using these cables allows the Multiplexer
to be located between 30 to 80 feet from the host.
Through one or more twinax breakout boxes and baluns. You can choose up
to four ports from two different twinax WSC polling groups (among WSC
adapters from a single host or among WSC adapters from two hosts).
The IBM 7299 Express Products for AS/400 products include both passive and
active hubs. All the 7299 hubs split the signal from a twinax workstation controller
port and distribute it among the attached devices.
The 7299 provides 1 Mbps mode mode support for legacy 1 Mbps mode devices
and workstation controllers.
Chapter 1. Introducing the IBM 7299 Multiplexer, Express Hub, and Entry Hub for AS/400 1-1

You can connect the 7299 Hubs to the host:
Directly
Through a 5494, 5394, or 5294 Remote Control Unit
Through a 6299 UTP Distribution Block or multiplexer for 1x operation
Through a 7299 Multiplexer for 1x/2x operation
As shown in Figure 1-1, you connect each device directly to the 7299 Hub. This is
a star topology that lets you connect and disconnect devices from a host
workstation controller port without affecting other devices using the same port.
Figure 1-1. Sample Installation - Express and Entry Hub
You can connect the 7299 Multiplexer to the host:
Directly to the Workstation Controller
Through a 5494, 5394, or 5294 Remote Control Unit
With UTP to individual polling groups
As shown in Figure 1-2 on page 1-3, you connect each hub or device directly to
the 7299 Device Multiplexer.
1-2 Planning, Installation, and Maintenance Guide

Figure 1-2. Sample Installation - 7299 Multiplexer Point-to-Point
The 5250 Express Data Stream
5250 Express Data Stream can increase throughput to 5250 Express adapters by
nearly four times. The 5250 Express Data Stream provides the following modes of
operation to increase performance:
Optimized mode
This mode reduces the number of bits required to transmit the same amount
of data to the supported device (as compared to the traditional twinaxial
protocol).
2 Mbps mode
When all the devices on the port support 2 Mbps mode, using this mode
doubles the overall line speed from 1 Mbps mode to 2 Mbps mode.
Using both the optimized mode and the 2 Mbps mode can increase the media
throughput by almost four times. For measured throughput enhancements, visit our
web page at:
http://www.networking.ibm.com/525ð
Note: Although the media performance is increased, the actual performance
improvements vary depending on the host and PC processor speeds, memory, and
the application load.
The 7299 also supports devices that are not capable of running 2 Mbps mode. If
any device on the host port does not support 2 Mbps mode, the line speed remains
at 1 Mbps mode.
Chapter 1. Introducing the IBM 7299 Multiplexer, Express Hub, and Entry Hub for AS/400 1-3

Product Highlights
The IBM 7299 Express Products for AS/400:
Reduces costs by letting you use inexpensive unshielded twisted-pair (UTP)
cabling to connect your devices to the following:
– AS/400 host
– System/38 host
– System/36 host
– 5494 Remote Control Unit
– 5394 Remote Control Unit
– 5294 Remote Control Unit
Creates a star topology that provides flexibility for adding, removing, and
moving devices
Reduces transmission delays when using optimized mode and 2 Mbps mode
Supports the 5250 Express Data Stream or traditional 5250 devices in 1 Mbps
mode
Provides the flexibility of reconfiguring active pins and polarity to accommodate
changes in your cabling scheme
The 7299 active hubs also provide:
Receiver circuitry that improves impedance-matching and reduces reflection
problems
True protocol transparency (provided that the polarity and the pinout are
consistent throughout your network), so that you have maximum device
performance and reliability
Advanced DC filtering and transient suppression for improved immunity to noise
from the AC power line
When used with 6299 baluns, that filter out noise, the 7299 active hubs provide a
clear transmission path and prevent noise from disrupting sessions.
The 7299 Multiplexer also provides:
8 ports (two clusters of four ports each) multiplexed into a single fiber optic
cable. This maps directly to the latest work station controller (WSC)
implementation in the AS/400. Two polling groups are permitted with one port
in each group active at a time.
Connection to the AS/400 from the Host Multiplexer by either the DB25 direct
connection or eight individual RJ45 connectors (with appropriate twinax
distribution block and baluns). Set jumpers for each one of the 8 ports to
choose the method of connection. Jumper-selectable pair callouts in the RJ45
connection permit 4/5, 3/6, and 1/2 parings.
Connection to twinax devices (Hub or Terminal) by either the DB25 connection
(with gender changer and twinax distribution block) or eight individual RJ45
connectors.
The backbone media is 62.5/125 micron multi-mode fiber optic cable. The
length of fiber run is similar to the 6299 Family. The 7299 Multiplexer uses the
ST-type fiber optic connector. Overall length is influenced by a number of
1-4 Planning, Installation, and Maintenance Guide

intermediate switch or coupling points. Fiber performance must be within the
loss budget for the media.
The ring feature in which the Host Multiplexer provides its eight ports and all
seven addresses for each port at up to three device-configured 7299
Multiplexers. The ring feature provides for maximum flexibility over the fiber
optic media to drop host ports at geographically diverse locations.
Chapter 1. Introducing the IBM 7299 Multiplexer, Express Hub, and Entry Hub for AS/400 1-5

7299 Passive Hubs
Both of these low-cost models connect any 5250-type device to an AS/400,
System/38, or System/36 host over a distances of up to 100 m (326 ft). Because
these models do not require power, you can use them in wiring closets where no
power is available:
1PA This model, shown in Figure 1-3, supports one host port and up to
seven attached devices. This model can be used on a desktop or can
be mounted on a wall. The 1PA is a lower-priced equivalent of the IBM
5299 Terminal Multiconnector.
Figure 1-3. Front View of Model 1PA
2PA This model, shown in Figure 1-4, supports up to two host ports and up
to fourteen attached devices. This model is rack mounted.
Figure 1-4. Front View (left side) of Model 2PA
These models use UTP cabling and are available with RJ11 or RJ45 connectors.
These models split the signal from a workstation controller port into seven signals.
They are impedance matched and provide isolation between devices.
1-6 Planning, Installation, and Maintenance Guide