IBM 3708 Operating and installation instructions

Description
!~~.~ 3708
Network
Conversion Unit
GA27-3768-01

Federal Communications Commission (FCC) Statement
Warning: This equipment generates, uses, and can radiate radio frequency energy and if not installed and
used in accordance with the instruction manual, may cause interference to radio communications.
It has been
tested and found to comply with the limits for a Class A computing device pursuant to Subpart J
of Part 15
of FCC rules, which are designed to provide reasonable protection against such interference when operated in
a commercial environment. Operation
of this equipment in a residential area is likely to cause interference in
which case the user
at his own expense will be required to take whatever measures may be required to correct
the interference.
Instructions to User: In many instances, shielded cables and connectors must be used for connection to
peripherals. Proper IBM cables are available from authorized dealers. The manufacturer
is not responsible
for any radio or television interference caused by using other than the recommended cables or by
unauthorized modifications to this equipment;
it is the responsibility of the user to correct such interference.
If necessary, the user should consult the dealer or an experienced radio/television technician for additional
suggestions. The user may find the following booklet prepared
by the Fedend Communications Commission
helpful:
How to Identify and Resolve Radio-TV Interference Problems
This booklet is available from the following:
FOB Public Contact Branch
Room
725
1919 M St. NW
Washington, DC 20554
Tele. [phone]
Second Edition (February, 1988)
Consumer Assistance and
Small Business Division
Room
254
1919 M St. NW
Washington,
DC 20554
Tele. [phone]
This edition obsoletes GA27-3768-0.
Changes are made periodically to the information herein; before using this publication in connection with the
operation
of IBM systems or equipment, consult the latest IBM System/370, 30xx and 4300 Processors
Bibliography, GC20-0001; System/38 Bibliography, GH30-0233; and 8100 Bibliography, GC20-8100, for the
editions that are applicable and current.
Any reference to an IBM licensed program in this document
is not intended to state or imply that only IBM's
licensed program may
be used. Any functionally equivalent program may be used instead. It is possible that
this material may contain reference to, or information about, IBM products (machines and programs),
programming, or services that are
not announced in your country. Such references or information must not
be construed to mean that IBM intends to announce such IBM products, programming,
or services in your
country.
Publications are not stocked
at the address given below; requests for IBM publications should be make to
your IBM representative or to the IBM branch office serving your locality.
A form for reader's comments
is provided in the back of this publication. If the form has been removed,
comments may be addressed to IBM Corporation, Communication Products Information Development,
Department E02, PO Box
12195, Research Triangle Park, North Carolina, U.S.A. 27709. IBM may use or
distribute any
of the information you supply in any way it believes appropriate without incurring any
obligation whatever. You may,
of course, continue to use the information you supply.
©Copyright 1987,1988

About This Book
This book contains descriptive information about the IBM 3708 Network
Conversion Unit.
It describes the 3708, its advantages, operating modes, and
hardware and software requirements.
It is intended to be used by people who need an in-depth description of the 3708's
components and operation. To
use the information, you should be familiar with the
following:
• American National Standard Code for Information Interchange (ASCII)
• Asynchronous (start-stop) devices
• IBM
3270 Information Display System
• Systems Network Architecture (SNA).
This book
is not a standalone reference for planning, installing, and operating. It is
recommended that you read the information in the planning chapters
of the IBM
3708 Network Conversion Unit Planning and Installation, GA27-3766, before
installing the 3708.
For operational information, read IBM 3708 Network
Conversion Unit End-User Reference, GA27-3765.
How This Book Is Organized
This book contains eight chapters and six appendixes:
Chapter
1, "Introduction" introduces the 3708 and describes its components and
functions.
Chapter 2, "3708 Operation" describes areas
of operation including: LED steady
states, configurations, logs, timers, and establishing and disconnecting a session.
Chapter 3, "SDLC and SNA Communication" provides information about
establishing host-to-3708 communication using SNA protocols.
Chapter 4, "Protocol Conversion Mode" describes the 3708's protocol conversion
mode
of operation.
Chapter 5, "3708 Protocol Enveloping Mode" describes the 3708's protocol
enveloping mode
of operation.
Chapter 6, "ASCII Pass-Through Mode" describes the 3708's ASCII Pll;ss-through
mode
of operation.
Chapter 7, "Nonstandard Operations" describes the nonstandard operating bits field
of the General Definition screen.
Chapter 8, "Network Management and Problem Determination" discusses the 3708's
Communication Network Management support.
Appendix A, "Host Considerations" provides consideration and restriction
information for host support
of the 3708.
Appendix B, "3708 Security" discusses the 3708's security features.
About This Book iii

Appendix C, "Suggested Guidelines for Increasing 3708 Performance" lists actions
that increase the performance and throughput
of the 3708.
Appendix D, "Personal Computer File Transfer through the 3708" provides helpful
information for customers developing their own programs to transfer files through
the 3708.
Appendix E, "Key Data Formats and Control Blocks" contains a briefdescription
of
the 3708 control blocks and data areas.
Appendix F, "mM-Supplied Translate Tables" shows the standard
3708 translate
tables for EBCDIC and ASCII characters.
This book also contains a glossary and
an index.
Related 3708 Library Publications
The following lists books and information for the 3708:
iv IBM 3708 Description
• IBM 3708 Network Conversion Unit Setup, GA27-3611, is shipped with the 3708
and describes how to set up and test the 3708, how to handle setup problems,
and how
to prepare the 3708 for relocation.
• IBM 3708 Network Conversion Unit Planning and Installation, GA27-3766,
describes planning and installation information.
• IBM 3708 Network Conversion Unit Problem Determination, GA27-3767,
provides procedures for solving
3708 problems.
• Unpacking instructions are printed on the
3708 shipping carton and show how
to unpack the 3708.
• IBM 3708 Network Conversion Unit Problem Report, GA27-3638, which is
shipped with the 3708, provides a means
of recording problem diagnosis
information,
that is used by repair center representatives.
• IBM 3708 Network Conversion Unit End-User Reference, GA27-3765, describes
the procedures for operating the
3708 and the 3708 screens.
• IBM 3708 Network Conversion Unit Registration Address Form is shipped with
the 3708. This card must be completed and returned to IBM for you to
automatically receive notification
of changes in the 3708 microcode.
• IBM 3708 reference cards describe the keyboard functions
of ASCII displays
that can be connected to a
3708 and describes the general procedures for
terminal users.

The end-user devices and the 3708 reference card order numbers are:
End-User Device
IBM Personal Computer (PC) in 3101 Emulation Mode
with standard 3101 keyboard functions
IBM 3101 Display Terminal Models 10, 12, 13,20,22,
and 23
IBM 3151, 3161, 3162, 3163, and 3164
IBM 3151, 3161, 3162, 3163, and 3164 (3708 Feature)
ADDS Viewpoint® Display Station
ADDS Viewpoint®/78
Beehive™ ATL-078
Data General Dasher® D210 Display Terminal
DEC® Model VT100
DEC® Model VT220 (Emulating a VT100)
DEC® Model VT220
DEC® Model VT52
FALCO 500®
Hazeltine
Esprit ITM and JITM
Hazeltine 1500
Hewlett-Packard 262lB Interactive Terminal
Lear Siegler ADM 24E
Lear Siegler ADM 3A Dumb Terminal®
Lear Siegler ADM 31 TM
Northern Telecom Displayphone™
ROLM Cedar
ROLM Cypress
ROLM Juniper
Teletype 5410 Async. Display Terminal
Teletype 5420
TeleVideo® 910
TeleVideo® 912C
TeleVideo® 950
User-Defined Terminal
WY-50®
Service Information
Form No.
SX27-3635
SX27-3633
SX27-3862
SX27-3867
SX27-3636
SX27-3706
SX27-3645
SX27-3652
SX27-3638
SX27-3790
SX27-3639
SX27-3637
SX27-3864
SX27-3640
SX27-3641
SX27-365I
SX27-3703
SX27-3642
SX27-3704
SX27-3653
SX27-3649
SX27-3648
SX27-3650
SX27-3646
SX27-3647
SX27-3643
SX27-3705
SX27-3644
SX27-3654
SX27-3865
For service on 3708 hardware and microcode problems, call the following number in
the United States or Puerto Rico:
1 800 428-2569 (toll free)
In other countries, call the appropriate support group.
About This Book V

vi IBM 3708 Description

Changes Since the Last Edition
This edition contains the following new information:
• Descriptions
of additional support in the nonstandard operations field
• Descriptions
of the enhanced terminal support, including:
IBM 3270 Models 2,
3, 4, and 5 emulation
Customized
UDT names
Customized terminal logon initialization sequences.
• A description
of a new host port inactivity timeout option
• A description
of a new printer option, "Perform Newline at Begin Bracket
(LU_3)."
Changes Since the Last Edition vii

viii IBM 3708 Description

Contents
Chapter 1. Introduction
Overview
....... .
Advantages
The
3708 in the Network
Hardware Components
of the 3708
3708 Base
3708 Cartridge
Functions
Protocol Conversion
Display Support .
Printer and Keyboard Printer Support
Multiple Logical Unit Support
Protocol Enveloping
........ .
ASCII Pass-Through
........ .
Functions Available for Each Mode
Control Terminal Functions
Hosts
..... .
SNA Hosts .
ASCII Hosts
ASCII Devices
Special Cartridges for the IBM 3151, 3161, 3162, 3163, and 3164
Chapter
2. 3708 Operation ....
LED Sequences and Steady States
Sequences
........... .
Normal Power On and Restart Light Sequence
Extended Diagnostic Sequence
..... .
Relocate Customer Setup Light Sequence
.. .
Steady States
.................... .
Base and Cartridge Lights Blinking Alternately
Base and Cartridge Lights Both Off
........... .
Base and Cartridge Lights Blinking Together
One or Both
of the Lights on Solid
Restart
on Error Loop ... .
Configurations
............ .
IBM-Supplied Configuration
Customer-Defined Configuration
Operational Configuration
Update Configuration
..... .
Permanently Reinstating the IBM-Supplied Configuration
Establishing a Session
... .
Logon Procedures
..... .
3708 Port Logon Screens
Short Logon Screens
..,
Control Terminal Logon
SNA Host Logon
.... .
ASCII Host Logon
... .
Ending Host Sessions and Disconnecting from the
3708
SNA Hosts ........................ .
Unconditional Disconnection and Session Termination
Conditional Disconnection
.. . . .
Unconditional Session Termination
Contents
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1-4
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ix

ASCII Hosts ............ 2-13
Session Termination 2-13
Unconditional Disconnection 2-13
XON/XOFF Pacing .... 2-14
Receive XON/XOFF ....... 2-14
Transmit XON/XOFF ...... 2-14
Receive Queue Pacing Threshold
2-15
Alert, Error, and EEIF Logs 2-16
Alert Log ............. 2-16
Error Log ............. 2-16
Extended Error Information Field (EEIF) 2-16
Timers and Time Stamps ........ 2-17
3708 Relative Time Clock ...... 2-17
Time Stamps and Error Log Entries 2-18
Hardware Interface Operation 2-19
Connector Pin Definitions 2-19
EIA 232C Definition .... 2-19
EIA 422A Definition .... 2-21
Interface Leads during Port Activation 2-21
Nonswitched Asynchronous Line Activation 2-21
Switched Line Activation - Not CDSTL . 2-22
Switched Line Activation -CDSTL 2-22
Asynchronous EIA 422A Line Activation . 2-23
SDLC Link Activation PRTS ........ 2-23
SDLC Link Activation Controlled RTS .. 2-24
Asynchronous Line Operation - HDX Communication Facility - HDX
Control Unit .................................. 2-25
Asynchronous Line Operation - FDX Communication Facility, PRTS,
HDX Control Unit .............................. 2-26
Asynchronous Line Operation - FDX Communication Facility, PRTS,
Echoplex (FDX or
HDX CU) ......................... 2-27
Asynchronous Line Operation - FDX Communication Facility PRTS -
FDX Control Unit .......... 2-28
Chapter 3. SDLC and SNA Communication 3-1
Helpful Publications ..... 3-1
SDLC Transmission Frames 3-2
Normal Response Mode . 3-2
Normal Disconnect Mode 3-2
SDLC Station Address . . 3-3
Control Field ....... 3-3
Supervisory Commands 3-3
Nonsequenced Commands and Responses 3-4
Information Field ............. 3-5
Sequence Error Recovery Procedures 3-5
Abort Function ..... 3-5
SDLC Inactivity Time Out .... 3-6
How the Timer Works ..... 3-6
Backing Up an SNA Host Link 3-7
SNA Sessions ........... 3-8
SSCP-PU Session ....... 3-8
SSCP-Secondary LU Session 3-8
PLU-SLU Session ...... 3-9
Initiating an LU-LU Session 3-9
Example of Establishing a Session 3-10
Terminating an LU-LU Session . . 3-12
X IBM -3708 Description

3708 Sessions
3708 Session Components
........................... .
Associating 3708 LUs with Host LUs
.................... .
SNA Commands
.................................... .
Transmission Formats
............................... .
Transmission Header
................................ .
Supported SNA Commands
........................... .
Activate Physical Unit (ACTPU)
....................... .
Deactivate Physical Unit (DACTPU)
.................... .
Activate Logical Unit (ACTLU)
...................... ..
Deactivate Logical Unit (DACTLU) ..................... .
NOTIFY ..................................... .
BIND
....................................... .
BIND for Protocol Conversion
(LU types 1 (SCS), 2, and 3 (DSC» .. .
BIND Check
................................... .
Recommended Logmode Table Settings for Protocol Conversion
.... .
BIND for Protocol Enveloping
........................ .
Recommended Logmode Table Settings for Protocol Enveloping
.... .
UNBIND ..................................... .
Clear
....................................... .
Start
Data Traffic (SDT) ............................ .
Cancel
....................................... .
Chase
....................................... .
BID
........................................ .
Signal
....................................... .
TERMSELF ................................... .
LU Status (LUSTAT) ............................. .
Ready to Receive (RTR)
............................ .
REQMS
...................................... .
RECFMS
..................................... .
Shutdown
..................................... .
Shutdown Complete
.............................. .
FM Data ..................................... .
Summary
of SNA Commands ............................ .
Pacing
.......................................... .
Pacing (LU type I SCS)
.............................. .
Pacing
(LU type 2 and LU type 3 DSC) .................... .
Pacing for
LU type 1 NTO Sessions ....................... .
SNA Responses
.................................... .
LU-LU Session Error Reporting ......................... .
SNA Sense Codes
.................................. .
Session Processing States
............................... .
Bracket States
.................................... .
Between Bracket (BETB) State
........................ .
Pending Begin Bracket (pEND.BB) State
.................. .
In Bracket (INB) State ............................. .
3708 Bracket State Errors
............................. .
RU Lengths ....................................... .
Outbound to the 3708
............................... .
Inbound from the 3708
.............................. .
Segmenting
of Request/Response Units ...................... .
Switching Between SSCP-LU
and LU-LU Sessions ............... .
SSCP Communications before the BIND
.................... .
SSCP Communications after
an LU type 2 BIND .............. .
SSCP Communications after
an LU type 1 (NTO) BIND .......... .
SSCP Communication to Printers
........................ .
3-13
3-13
3-14
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3-17
3-17
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Contents xi

SSCP Communication to Displays ........................ .
Messages
from the Host ............................ .
Messages
from the Terminal ..... . . . . . . . . . . . . . . . . . . . . . .
SNA Printer Control ................................. .
Chapter 4. Protocol Conversion
Mode .......... .
Data Flow in Protocol Conversion Mode ........ .
Flow of Data from the SNA Host ....... .. .
Flow of Data from the Tenninal ......... ..
3270 Data Stream (LU type 2) ............ .
Buffer Addresses
for Displays ........... .
12/14 Bit Addressing
............... .
Host Data ..................... .
3270
Data Stream Commands ........... .
Write Operation ................... .
The Write Control Character (WCC) Byte
Write
Command .................. .
Erase/Write
Command .............. .
Erase/Write Alternate
Command ........ .
Erase All
Unprotected (BAU) Command ... .
Read Operation .................... .
Read Buffer .................... .
Read Modified Command ............ .
Full-read-modified response
........... .
Selector light-pen response
............ .
Short read response ................ .
Read Modified All Command ....... . . . .
Orders
and Attributes ............................... .
Start Field (SF) ............................... .
Set Buffer Address (SBA)
........................... .
Insert
Cursor (IC) ................................ .
Program Tab (PT) ............................... .
Repeat to Address (RA) ............................ .
Erase
Unprotected to Address (EUA) ..... . ............. .
Processing the 3270 Data Stream . . . . . . . . . . . . . . . . . . . . .
3270
Data Stream (LU type 3) ........................... .
Commands ...................................... .
Print Line Formatting ............................... .
Formatted Printouts .............................. .
Unformatted Printout
Printer Compatibility Features ............ . . . . . . . . . . . .
3270
Data Stream (LU type 1) ........................... .
SCS
Control Codes Overview ...... . . . . . . . . . . . . . . . . . . . . . .
SCS Control Code Descriptions ........... .. . . . . . . . . . . .
Back Space (BS)
................... ...... . . . . . . .
Carriage
Return (CR) ............... ........ . . . . .
Enable Presentation (BNP) ............ ...... . . . . . . .
Form Feed (FF) ................................. .
Horizontal Tab (HT) .............................. .
Inhibit Presentation (INP) ........................... .
Interrecord
Separator (IRS) .......................... .
Line
Feed (LF) ................................. .
New Line (NL) ................................. .
Set
Horizontal Format (SHF) ......................... .
Set Line Density (SLD)
............................ .
Set Vertical
Format (SVF) ........................... .
xii IBM 3708 Description
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Transparent (TRN) ........................... .
Vertical Channel Select (YCS)
..................... .
Vertical
Tab (YT) ............................ .
Graphic Escape (GE)
.......................... .
Set Attribute (SA)
................................ .
Configuration Options (protocol Conversion)
.............. . . . . . .
Device Class
..................................... .
Operating Mode
.................................. .
3270 Model Emulation
.............................. .
Interface Type
.................................... .
Parity
......................................... .
Translation Options
................................ .
Bits/Character
.................................... .
Delay After
Form Feed .............................. .
Delay After Carriage Return
........................... .
Maximum Platen Length
............................. .
Printer Authorization Matrix Options
.............. . . . . . . . . .
Nonstandard Operations
............................. .
Displays
......................................... .
Display Image
.................................... .
Display Fields
.................................... .
Attributes and Field Attribute Characters
.................. .
Automatic Skip
................................. .
Colors
....................................... .
Support for the IBM 3270 Models
2, 3, 4, and 5 ............... .
How the Host Determines Screen Sizes
................... .
Processing BINDs
................................ .
Internal Storage Requirements for Large Screens
............. .
LOCAL COPY Functions With Large Screens
............... .
Ending the Alternate Mode
.......................... .
Status Line
....................................... .
How the 3708 Updates the Status Line
..................... .
Displays With
an Addressable Status Line ................... .
Displays Without
an Addressable Status Line ................. .
Status Line Format
..... . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ready Status
................................... .
Device Emulation
................................ .
Session Indicator
Session Status
.................................. .
Insert Status
................................... .
Null Blank Status
................................ .
Type-Ahead Status
.............................. ..
Printer Status ............................. .
NNNCodes ................................... .
The Keyboard and its Functions
.......................... .
Cursor
....................................... .
Nulls
vs. Blanks ................................. .
Terminal Controlled Keys
........................... .
Keys
vs. Key Sequences ............................ .
Key Sequences for 3270 Functions
...................... .
Key Sequences for Non-3270 Functions
................... .
Terminal Tables
.................................... .
Controlling Displays With Terminal Tables
Standard and Enhanced Terminal Tables .
The Terminal Table Format
....
General Description Section
Contents
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4-57
xiii

TerminalID ...... .
Flags ...... .
Cursor Addressing Class
Alternate Control Sequence Character
Intermediate Control Sequence Character
Keyboard Mapping Definition Section
Terminal Control Section ...... ..
Color and Highlighting Restrictions . . . . . . . .
Customization Section ......... . ...... .
Keyboard Maps for Supported Displays. . . . . . . . .
Supported Displays ............ ...... .. .
Special Processing Provided for Specific Terminal Types
Processing for Terminal Functions
Initialization
Termination . . . . . . . . . .
Keytracking . . . . . . . . . .
Printers ............ .
Configuring a Printer for Protocol Conversion Mode
3287 Characteristics
Printer Input ........ .
Local Copy Function ..... .
Printer Authorization Matrix
Printer Mode ...
Printer Classes ..
Source Device List
Matrix Structure .
Printer IDs in the Status Line
Local Copy Operation .
Printer Selection ..... .
Changing the Print ID
Performing an Operator-Initiated Local Copy
Host Interference with Operator Copy
Host-Initiated Local Copy ............ .
Local Copy Printed Format .......... .
Local Copy While in Control Terminal Session
Displays with Printers
3708 Configuration .
Host Definition
Port Definition ..
LU Session Restrictions
How the 3708 Routes Data .
How the Operator Can Control Where the Data Goes
Special Information About Using the IBM 3101 and Hazeltine 1500
Screen Copy to the Auxiliary Port ....
Chapter 5. 3708 Protocol Enveloping Mode
Protocol Enveloping Overview ....... .
Protocol Enveloping Configuration Options
xiv IBM 3708 Description
Device Class ....... .
Full Duplex Line
Full Duplex Control Unit
Echoplex ......... .
Permanent Request to Send (PRTS)
Bi ts/Character
Parity ....
Ignore Parity
4-57
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Parity Error Substitution Character ........ .
Recognize
Terminal Attention ........... .
Attention Key Substitution Character ....... .
Allow Terminal
Break ................ .
Translate Option ................... .
Turnaround Characters .............. .
Text Timeout .................................... .
Send Read Prompt ................................. .
Recognize System
Request Simulation ..................... .
Delete
Rubout Character ............................. .
Delay after Carriage Return ........................... .
Delay after Form Feed .............................. .
Delay after Receipt of CR ............................ .
Line
Quiet Time . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inactivity Time
Out ........... . . . . . . . . . . . . .
Nonstandard Operations ........ . ........... .
Protocol Enveloping Host Considerations . . . . . . . . . . . . .
SSCPFM ................................... .
TERM=TWX ............................... .
TSO Terminal Profile . . . . . . . . . . . . . . . . . . . . . . . . .
BREAK Support ................................ .
SSCP Communication ............................. .
Data Flow Description .............................. .
Flow of Data from the SNA Host ........................ .
Flow of Data from the Terminal ...... .
Enveloping
Features ...
Transparency
Host Autodial .....
Chapter 6. ASCII Pass-Through Mode ...... ........ . . . . . .
Choosing an ASCII Host ............................... .
Operations in Pass-Through Mode ....................... .
Abnormal Conditions ............................. .
Terminating Pass-Through Mode
Configuration Notes ......... .
Dial Out ................ .
Chapter 7. Nonstandard Operations
Chapter 8. Network Management and Problem Determination
.... .
Using the 3708 Alerts ............................ .
Types
of Errors ............................... .
Detecting Problems
in an SNA and SDLC Network ......... .
CNM Formats Supported by the 3708 ................. .
REQMSjRECFMS Type 01 Secondary SDLC Test Counters ... .
REQMSjRECFMS Type 02 Error Summary Data ......... .
REQMSjRECFMS Type 03 Port Error Counters .......... .
NMVT 8080 Alert . . . . . . . . . . . . . . . . . . . . ..
NMVT 0080 Alert ............................ .
NMVT 0000 Alert ............................ .
NMVT 0025 Alert ............................ ..
Viewing Alerts at the Control Terminal Display
Using NetView
............ .
Sending Alerts
to the SNA Hosts
Alert Message Formats ....... .
NMVT 0000 Alert Format
5-3
5-4
5-4
5-4
5-5
5-5
5-6
5-6
5-6
5-7
5-7
5-7
5-8
5-8
5-8
5-8
5-9
5-9
5-9
5-9
5-9
5-10
5-11
5-12
5-12
5-14
5-14
5-14
6-1
6-1
6-3
6-3
6-3
6-4
6-4
7-1
8-1
8-1
8-2
8-3
8-4
8-4
8-4
8-4
8-4
8-4
8-5
8-5
8-6
8-6
8-7
8-7
8-8
Contents xv

NMVT 0025 Alert Format
Control Terminal Diagnostic Facilities
3708 Built-In Diagnostic Tests
...
Using the Response Time Monitor
Host Requirements .....
Supported Devices
Response Time Definitions
RTM Host Interface
Solicited
RTM Information
Unsolicited
RTM Information
Negative Responses
....... .
Host Request and 3708 Response Formats
Host Request Format .
3708 Responses
Format
Appendix A. Host Considerations
IBM 3705
or 3725 with NCP
NCP Generation Parameters
IBM 43xx ICA
......... .
43xx
ICA Generation Parameters
43xx
ICA Restrictions
IBM 8100
.............. .
8100 Generation Parameters
8100 Restrictions/Considerations when Attaching
to the 3708
Restrictions
..
Considerations .......... .
IBM System/38
............. .
System/38 Generation Parameters
System/38 Restrictions/Considerations when Attaching to the 3708
Restrictions
..
Considerations ....
Appendix B. 3708 Security
Port Passwords ...... .
Control Terminal Password
Control Terminal Access
Multiple Control Terminal Sessions
Transmission of UNBIND(OF) and/or TERM-SELF(40)
Inactivity Timeout
..... .
Disconnecting from a Session
Security Features ...... .
Appendix C. Suggested Guidelines for Increasing 3708 Performance
Appendix D. Personal Computer File Transfer through the 3708
..
Overview .............. .
Protocol Enveloping
........ .
Protocol Enveloping
Data Flow
Overflow
of the Receive Queue .
Encryption
.......... .
Protocol Enveloping Features
8-Bit Transparency ..... .
Protocol Enveloping
PC File Transfer Summary
Protocol Conversion
........ .
xvi IBM 3708 Description
Protocol Conversion Data Flow
Overflow
of the Receive Queue
8-13
8-16
8-17
8-18
8-18
8-18
8-18
8-22
8-22
8-23
8-23
8-24
8-24
8-29
A-I
A-I
A-I
A-4
A-4
A-4
A-5
A-5
A-6
A-6
A-6
A-7
A-7
A-8
A-8
A-8
B-1
B-1
B-I
B-2
B-2
B-2
B-2
B-3
B-3
C-l
D-l
D-l
D-l
D-l
D-2
D-3
D-4
D-4
D-5
D-6
D-6
D-6

Encryption ..................... .
Protocol Conversion Features ......... .
Protocol Conversion
PC File Transfer Summary
ASCII Pass-Through
................ .
Appendix E. Key
Data Formats and Control Blocks
System Buffers
.................. .
Maximizing Available System Buffers
... .
Determining the
Number of System Buffers
Receive Queues
Device Buffers
................ .
Appendix F. IBM-Supplied Translate Tables
Converting Between ASCII
and EBCDIC
Standard Translate Tables
Default Translate Table
Alternate Translate Table
...... .
Default EBCDIC to ASCII Translate Table
Default
ASCII to EBCDIC Translate Table
List of Abbreviations
Glossary
Index
..
Contents
D-6
D-7
D-8
D-9
E-I
E-I
E-I
E-2
E-2
E-2
F-I
F-I
F-4
F-4
F-4
F-5
F-ll
X-I
X-5
X-13
xvii

xviii IBM 3708 Description

Figures
1-1. IBM 3708 Network Conversion Unit ................... 1-2
1-2. The 3708 in the Network .......................... 1-4
1-3. Two Kinds of Dual SNA Host Connections ............... 1-5
2-1. Operational Configuration ......................... 2-6
2-2. Update Configuration ............................ 2-6
2-3. Port Password Screen (Cl) ......................... 2-7
2-4. Terminal Type Selection Screen (C2) ................... 2-8
2-5. Host Selection Screen (C3) ......................... 2-8
2-6. Logon Indication Screen (C4) ....................... 2-8
2-7. Control Terminal Password Screen (C5) ................. 2-9
2-8. Two Examples of Short Logon Screens .................. 2-10
2-9. Available Characters by Receive Queue Size ............... 2-15
2-10. Nonswitched Asynchronous Line Activation ............... 2-21
2-11. Switched Line Activation -not CDSTL .................. 2-22
2-12. Switched Line Activation -CDSTL .................... 2-22
2-13. Asynchronous EIA 422A Line Activation
................ 2-23
2-14. SDLC Link Activation PRTS ....................... 2-23
2-15. SDLC Link Activation Controlled RTS ................. 2-24
2-16. Asynchronous Line Operation -HDX Communication Facility -
HDX Control Unit
.............................. 2-25
2-17. Asynchronous Line Operation - FDX Communication Facility,
PRTS, HDX Control Unit
......................... 2-26
2-18. Asynchronous Line Operation -FDX Communication Facility,
PRTS, Echoplex (FDX or HDX CU)
................... 2-27
2-19. Asynchronous Line Operation -FDX Communication Facility PRTS
-
FDX Control Unit ............................. 2-28
3-1. Establishing a Session with a 3708 ..................... 3-11
3-2. Maximum Number of LUs Associated with each 3708 Downstream
Port
....................................... 3-13
4-1. 3708 Protocol Conversion -Internal Data Flow ............. 4-2
4-2. Buffer Control Orders and Order Codes ................. 4-11
4-3. Buffer Addressing Layout for 1920-Character Terminal ........ 4-30
4-4. IBM 3708 Status Line Format ....................... 4-39
4-5. The Printer Authorization Matrix Screen ................. 4-83
5-1. 3708 Protocol Enveloping -Internal Data Flow ............. 5-11
6-1. 3708 ASCII Host Pass-Through -Internal Data Flow ......... 6-2
8-1. Counters and Boundaries .......................... 8-19
8-2. Display of an RTM Log ........................... 8-21
F-1. United States EBCDIC I/O Interface Code for the 3708 ........ F-2
F-2. Supported United States I/O Interface Codes
.............. F-3
Figures xix