IBM 3745 Series Setup guide

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--_ .- 3745 Communication
Controller
Maintenance Information Reference (MIR)
Part 1
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SY33-2056-6

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IBM 3745 Communication Controller
Models 210,310,410, and 610
IBM 3746 Expansion Unit
Models A11, A12, L
13, L 14, and L 15
Maintenance Information Reference (MIR)
Part 1
SY33-2056-6

Note!
Before using this information and the product it supports, be sure to read the general
information under "Notices" on page ix.
Seventh Edition (August 1991)
The
information contained in this manual is subject to change from time to time. Any such changes
will be reported in subsequent revisions. Changes have been made throughout this edition, and this
manual should be read in its entirety.
Order publications through your IBM representative or the IBM branch office serving your locality.
Publications are not stocked at the addresses given below.
A form for readers' comments appears at the back of this publication. If the form has been removed,
address your comments to:
International Business Machines Corporation
Department 6R1 LG
180 Kost Road
Mechanicsburg PA 17055-0180
U.S.A.
or
IBM France
Centre d'Etudes et Recherches
Service 0762 BP 79
06610 La Gaude
France
When you send information
to IBM, you grant IBM a non-exclusive right to use or distribute the infor-
mation in any way it believes appropriate without incurring any obligation to you.
© Copyright International Business Machines Corporation 1988, 1991. All rights reserved.
Note
to U.S. Government Users -Documentation related to restricted rights -Use, duplication or dis-
closure is subject to restrictions set forth in GSA ADP Schedule Contract with IBM Corp.

Contents
Part 1
Chapter 1. General Information
Introduction ........... .
Modes
of Operation ...... .
Machine Identification and Capacity
3745 Model Identification ...... .
Frame Locations
.......... .
IBM 3745 Programming Support
Using the
3745 Library for Service
Preventive Maintenance
Maintenance Philosophy
Maintenance Aids
1-1
1-2
1-8
1-10
1-10
1-11
1-19
1-22
1-24
1-24
1-24
Chapter 2. Central Control Unit (CCU) 2-1
The CCU in 3745 Data Flow 2-2
General Description . ......... 2-3
Functional Description . . . . . . 2-4
CCU Environment 2-12
Main Storage ..... 2-14
CCU to/from Storage 2-19
CCU to/from Adapters (CA-LA) 2-23
CCU to/from MOSS ....... 2-46
CCU Diagnostics ......... 2-47
Problem Isolation Procedure for 210-to-410 or 3'10-to-610 Model Upgrade . 2-55
Chapter 3. Buses and Bus Switching ..... .
The Buses and Bus Switching in 3745 Data Flow
Generalities .. . . . . . . . . . . . . .
Bus Switch
Buses .....
Adapter Addressing .
Bypass Mechanism for LAs
Bypass Mechanism for CAs
Extended Troubleshooting: Adapter Bus Problem Isolation
Chapter 4. Transmission Subsystem (TSS)
Low Speed Scanner (LSS)
LlC Unit (LlU) ................. .
Serial Link (SL) ................ .
Communication Scanner Processor (CSP) Card
Front
End Scanner (FES) ..... .
Front
End Scanner Adapter (FESA) ... .
Serial Link (SL) ............... .
Double Multiplexer Card (DMUX) .... .
Single Multiplexer Card (SMUXA/B)
LlCs Type 1
to 4 Cards ............ .
LlCs Type 5 and 6
DTE Function
LlC Type 5
DCE Function ........... .
3-1
3-2
3-3
3-4
3-23
3-55
3-72
3-80
3-84
4-1
4-8
4-10
4-15
4-16
4-27
4-31
4-38
4-40
4-44
4-49
4-59
4-62
© Copyright IBM Corp. 1988, 1991 iii

L1C Type 6 DSU/CSU Function ...;.......
Scanner Microcode ................ .
Microcode Interaction with the Control Program
Microcode Interaction with
FES
Microcode Interaction with MOSS
Instruction Operation .....
External Registers Description
FES RAM A Description
FES RAM B Description .
FES RAM C Description .
Error Detection
..... .
Reporting Errors
to the CCU
Reporting Errors to the MOSS
Miscellaneous Status Fields
Error Status Description
Problem Determination Aids
for LlC1s to L1C4s
Problem Determination Aids for LlC5s and L1C6s
Chapter 5. The Token-Ring Subsystem
The TRSS in 3745 Data Flow .... .
Token-Ring Network
.......... .
The Token-Ring Adapter in the
3745
Token-Ring Interface Coupler (TIC) Card
Token-Ring Multiplexor (TRM) Card
Machine Internal Communications
Programmed Input/Output Operations
PIO Functional Description ..... .
PIO/MMIO Hand-Shaking Mechanism
PIO Format and Types
TRM
PIO Command Description
TRM Cycle Steal Operations
..
TRM Interrupt Operations
TRA Disconnect/Connect Function
TRA Resets
............ .
Error Detection and Reporting ..
TRA Interaction with Control Program
Problem Determination Aids
...... .
Chapter
6. High Performance Transmission Subsystem (HPTSS)
HPTSS
in 3745 Data Flow ..... .
Introduction
................. .
Internal Interconnections
.......... .
Communication Scanner Processor (CSP)
Front End Scanner High-Speed (FESH)
NCP-to-CSP Command Flow ..
Transmit Operation ...... .
Receive Operation
....... .
Modem Interface Management
Microcode Interaction with Control Program
Microcode Interaction with MOSS
HSS Registers ........ .
Error Detection and Reporting
Miscellaneous Status Fields
Problem Determination Aids
Communication Interfaces
iv IBM 3745 Maintenance Information Reference (MIR)
. 4-87
. 4-99
4-102
4-112
4-118
4-122
4~125
4-141
4-150
4-155
4-172
4-182
4-190
4-194
4-201
4-208
4-212
5-1
5-3
5-4
5-11
5-13
5-18
5-22
5-24
5-26
5-29
5-31
5-35
5-38
5-40
5-47
5-49
5-50
5-57
5-60
6-1
6-3
6-4
6-11
6-13
6-13
6-17
6-21
6-23
6-26
6-31
6-37
6-40
6-50
6-59
6-60
6-63

Part 2
Chapter 7. Channel Adapter (CA) . . . . .
The Channel
Adapter in 3745 Data Flow .
Introduction
........ .
CA Operating Environment '"
Overall Operation ....... .
Input/Output Instruction Format
CA Instructions (Register Contents)
Autoselection
............ .
Cycle Steal ............. .
CA Interface Enabling/Disabling
CA/MOSS Connection .... .
Interrupt Requests ....... .
Control Character Recognition
Two-Processor Switch (TPS)
CA Error Condition
Channel Stop ....
Interface Disconnect
I/O Error Alert
CA Concurrent Maintenance (CACM)
Testing and Checking Hardware
Channel Monitoring
CA Initialization ........ .
Chapter
8. Maintenance and Operator Subsystem (MOSS)
Introduction ....
MOSS Reset
MOSS Functions
MOSS States
MOSS Microcode
MOSS Interrupt Levels
Detection
of MOSS Errors
MOSS/CCU Communication
MOSS/CCU Adapter (MCCU) Registers
MOSS/CA Adapter (MCAD) Registers
MOSS/SWL Adapter (SWAD) Registers
Branch Trace
... .
Address Compare
.......... .
Mailbox Description
......... .
MOSS/Line Adapter Communication
LSSD Operation ........... .
MOSS/Disk Drive Interaction
MOSS/Operator Console Connections
Chapter
9. Control Panel, Operator Consoles, Disk/Diskette Drives
Control Panel ...
Operator Consoles
Disk/Diskette Drive
Chapter 10. 3745
Power System
The Power System in 3745 Data Flow
Introduction
....
AC Voltages Input .......... .
7-1
7-4
7-5
7-10
7-11
7-14
7-16
7-43
7-45
7-46
7-46
7-47
7-48
7-49
7-53
7-55
7-55
7-56
7-56
7-57
7-60
7-61
8-1
8-3
8-4
8-6
8-7
8-9
8-10
8-11
8-14
8-15
8-18
8-21
8-24
8-26
8-30
8-34
8-35
8-37
8-38
9-1
9-2
9-6
9-9
10-1
10-3
10-4
10-4
Contents V

Power Control Subsystem
Power Mode
of Operation
Power ON/OFF Sequence
POR from Power Control
Maintenance
Chapter 11. IML and IPL
IPL Initialization .....
Controller Initialization
IPL Structural Description
MOSS IML Description
Scanner IML Step Description
Timed IPL
.......... .
Chapter 12. Error Logging .
Introduction ......... .
BER Generalities ...... .
BERs Which Are Not Machine Errors
Specific Mechanisms
AutoMaint
.......... .
BER Recovery Procedures .
Unresolved Interrupts
..
MOSS BER Type 01
Diagnostics BER Type 03
Power BER Type 04 .
NCP ESS BER Type 08
NCP CA BER Type 10
NCP TSS/HPTSS BER Type 11
NCP/PEP BER, Type 12
NCP CCU BER Type 13
NCP IOC BER Type 14
NCP TRSS BER Type 15
Chapter 13. Traces, Dumps and File Transfer
Traces ...................... .
Traces in an ACF/VTAM Environment
Host Traces (Environment-Independent)
External Scanner Interface Trace
...... .
Internal Scanner Interface Trace
Scanner Microcode Checkpoint Trace
Internal Channel Adapter Trace .. .
LOGREC Display With EREP .... .
Dumps and File Transfer
to the Host
Chapter 14. Ethernet Subsystem (ESS)
ESS in 3745 Data Flow ...... .
Introduction
.............. .
Frame Types Supported
ELA Microcode Description
.... .
Internal Interconnections ...... .
Communication Scanner Processor (CSP)
Ethernet LAN Coupler Card (EAC)
..... .
NCP-to-CSP Command Flow
......... .
Microcode Interaction With Control Program
Parameter/Status Area Layout
....... .
vi IBM 3745 Maintenance Information Reference (MIR)
10-38
10-42
10-44
10-46
10-75
11-1
11-2
11-5
11-6
11-25
11-27
11-29
12-1
12-4
12-6
12-13
12-14
12-19
12-27
12-28
12-32
12-119
12-121
12-128
12-140
12-152
12-164
12-167
12-171
12-173
13-1
13-2
13-4
13-7
13-16
13-24
13-30
13-31
13-61
13-62
14-1
14-3
14-4
14-8
14-10
14-12
14-13
14-14
14-17
14-20
14-25

ELA Command Description .....
Microcode Interaction With MOSS
ELA Registers ......... .
Error Detection and Reporting .
Problem Dete"rmination Aids
List of Abbreviations
Glossary ..
Bibliography . . . . . . . . .
3745 Models 210, 310, 410, and 610 Customer Documentation
3745 Models 210, 310, 410, and 610 Service Documentation.
Index ................................ .
14-32
14-39
14-42
14-50
14-59
X-1
X-11
X-17
X-17
X-18
X-19
Contents vii

viii IBM 3745 Maintenance Information Reference (MIR)

Notices
References in this publication to IBM products, programs or services do not
imply that IBM intends to make these available in all countries in which IBM
operates. Any reference to an IBM product, program, or service is not intended
to state or imply that only IBM's product, program, or service may be used.
Any functionally eq·uivalent product, program, or service that does not infringe
any of IBM's intellectual property rights may be used instead of the IBM
product, program, or service. Evaluation and verification of operation in con-
junction with other products, except those expressly designated by IBM, is the
user's responsibility.
IBM may have patents or pending patent applications covering subject matter in
this document. The furnishing of this document does not give you any license
to these patents. You can send license inquiries, in writing, to the IBM Director
of Commercial Relations, IBM Corporation, Purchase, NY 10577, U.S.A.
Electronic Emission Notices
Federal Communications Commission (FCC) Statement
Note: This equipment has been tested and found to comply with the limits for a
Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when
the equipment is operated in a commercial environment. This equipment gen-
erates, uses and can radiate radio frequency energy and, if not installed and
used in
accordance with the instruction manual, may cause harmful interfer-
ence to radio communications. Operation of this equipment in a residential
area is likely to cause harmful interference, in which case the user will be
required to correct the interference at his own expense.
Properly shielded and grounded cables and connectors must be used in order
to meet FCC emission limits. IBM is not responsible for any radio or television
interference caused by using other than recommended cables and connectors
or by unauthorized changes or modifications to this equipment. Unauthorized
changes or modifications could void the user's authority to operate the equip-
ment.
This
device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference,
and (2) this device must accept any interference received, including interfer-
ence that may cause undesired operation.
For Canada, Canadian Department of Communication Statement, GX27-3883,
applies.
© Copyright IBM Corp. 1988, 1991 ix

Trademarks and Service Marks
The following terms, denoted by an asterisk (*), used in this publication, are
trademarks
or service marks of IBM Corporation in the United States or other
countries:
IBM
NetView
RETAIN
LPDA
OS/2
YES
MVS
PS/2
VTAM
The following terms, denoted by a double asterisk (**), used in this publication,
are trademarks of other companies:
Ethernet Xerox Inc.
X IBM 3745 Maintenance Information Reference (MIR)

Product Safety Information
General Safety
Safety Notices
This product meets IBM* safety standards.
For
general safety information, see:
• Telecommunication Products Safety Handbook, GA33-0126
See Safety Notices located at the beginning of the Maintenance Information Pro-
cedures manual, SY33-2054.
Service Inspection Procedures
The Service Inspection Procedures helps service personnel check whether the
3745 conforms to IBM safety criteria. They have to be used each time the 3745
safety is suspected.
The Service Inspection Procedures section is located at the beginning
of the
3745 Maintenance Information Procedures (MIP) manual.
The
3745 areas and functions checked through service inspection procedures
are:
1. External covers
2. Safety labels
3. Safety covers and shields
4. Grounding
5. Circuit breaker and protector rating
6. Input power voltage
7. Power-ON indicator
8. Emergency power OFF.
© Copyright IBM Corp. 1988, 1991
xi

xii IBM 3745 Maintenance Information Reference (MIR)

About This Book
This manual provides:
1. Introductory and how-to-fix information
2. Information for maintaining CSAs (Common Sub-assemblies)
3. Description of IBM 3745 Communication Controller functional units.
The console(s) and
operator panel procedures are not provided in this manual,
but are provided in the:
• 3745 Advan(;ed Operations Guide, SA33-0097, and 3745 Service Functions,
SY33-2055, for the maintenance functions used by service personnel.
• 3745 Basic Operations Guide, SA33-0098, for the control panel functions.
Who Should Use This Book
This manual is intended for the product support-trained CE (PST CE) to service
the IBM 3745 Communication Controller whenever the product-trained CE (PT
eE) cannot
repair the machine using the Maintenance Information Procedures
(MIP) manual.
The person using this Maintenance Information Reference (MIR) manual should:
• Have an understanding
of the telecommunications environment.
• Be trained to service the 3745 Communication Controller.
• Be
familiar with the data circuit terminating equipment (modems, autocall
units, and- so on) and the terminals that attach to 3745s.
• Be familiar with the host channel to which the 3745 can be attached.
Service Personnel Definition
See Maintenance Information Procedures manual.
© Copyright IBM Corp. 1988, 1991
xiii

How to Use the Maintenance Library
Maintenance on the 3745 is performed only when a failure or suspected failure
occurs in the machine. The customer is first expected to perform problem
determination to see if a 3745 problem exists. He uses the Problem Determi-
nation Guide and a host
or 3745 console to perform the requested procedures.
The problem determination guide
generally produces a reference code that the
customer should provide to the Hardware Central Service (HCS)
If the HCS is contacted, they will confirm that the initial problem determination
has been done correctly, and determine
if a hardware failure is indicated.
Where hardware replacement is required, the
HCS will determine which FRU(s)
should be replaced, and dispatch a CE with the information needed to identify
and replace them. When replacement has been completed, the
CE will test the
machine as directed by the MIP and Service Functions manuals, to verify,the
repair.
At this point, the Maintenance Information Procedures portion
of the 3745 Main-
tenance Library has been exhausted.
If additional problem analysis is required,
the
CE should contact the HCS for assistance, since the problem may require
special tools or techniques that are described in the Maintenance Information
Reference and Service Functions manuals, and are applied by a Product
Support-Trained
CE.
For more details, see "Maintenance Philosophy" in Chapter 1.
Where to Find More Information
See "Bibliography" page X .. 17.
xiv IBM 3745 Maintenance Information Reference (MIR)

Summary of Changes
This revised edition gives information concerning the Ethernet**/IEEE 802.3 local
area network feature and the new
3745 models 310 and 610.
This edition also corrects minor errors or omissions.
© Copyright IBM Corp. 1988, 1991
xv

xvi IBM 3745 Maintenance Information Reference (MIR)

© Copyright IBM Corp. 1988, 1991
Part 1 contain's Chapters 01 to 06, the
Abbreviation list, Glossary, and Index.
Part 1

IBM 3745 Maintenance Information Reference (MIR)

Chapter 1. General Information
Introduction ....... .
ControHer
Organization
3745 Data Flow
Console
Summary
Modes of Operation
Machine Identification and Capacity
3745-210
or 310 (Base Frame or Frame 01)
3745-410 or 610 (Base Frame or Frame 01)
3746-A 11 (Frame 02)
3746-A12 (Frame 03)
3746-L 13 (Frame 04)
3746-L 14 (Frame 05)
3746-L 15 (Frame 06)
3745 Model Identification
Frame Locations
.....
Base Frame, Frame 01 Component Locations
Adapter Frame, Frame 02 Component Locations
Adapter Frame, Frame 03 Component Locations
Line Frame, Frame
04 Component Locations
Line Frame, Frame
05 Component Locations
Line Frame, Frame
06 Component Locations
IBM 3745 Programming Support
Controller-Resident Programs ....... .
Host-Resident
Programs ....... .
Generating and Loading
the Control Program
Migration/Coexistence ............. .
Using
the 3745 Library for Service ....... .
Remote Service From
Hardware Central Service (HCS)
On Site Service
Preventive
Maintenance
Maintenance Philosophy
Maintenance Aids
Tools and Test Equipment
© Copyright IBM Corp. 1988, 1991
1-2
1-2
1-6
1-7
1-8
1-10
1-10
1-10
1-10
1-10
1-10
1-10
1-10
1-10
1-11
1-12
1-14
1-15
1-16
1-17
1-18
1-19
1-19
1-20
1-21
1-21
1-22
1-22
1-23
1-24
1-24
1-24
1-24
1-1