Table Of Contents - IBM 2740-1 System Reference Manual

IBM 2740 COMMUNICATION TERMINAL, MODEL 1
Types of O p e r a ti o n ..................................................................................... 2
A p p l i c a t i o n s ...............................................................................................3
Communication F a c i l i t i e s ............................................................................ 3
D ata Sets ...............................................................................................4
Line-Control S i g n a l s ..................................................................................... 4
TRANSMISSION CONTROLS AND INDICATORS, MODEL 1 .
Local/C om m unicate K ey.
Standby (S) L i g h t ......................................................................................7
Transmit (T) L i g h t ......................................................................................7
Receive (R) L i g h t ......................................................................................7
Bid Key and L i g h t ......................................................................................7
R estart (RST) Key and Light (Checking Special F eature)
D ial-Disconnect (Disc) Key and D ial-Connect Light (D ial-
Up Adapter Special F e a t u r e ) ......................................................... 8
EOB (End-of-Block) Key (Checking Special Feature) .
A utom atic EOB (Prerequisite, Checking Feature)
EOT (End-of-Transmission) K e y ........................................................10
Transm it-C ontrol Switch (M TC, Off) Transmit Control
Special F e a t u r e ....................................................................................10
Test S w i t c h ............................................................................................. 10
PRINCIPLES OF OPERATION, 2740 MODEL 1 .
P oin t-to -P o in t Operation (Term inai-to-T erm in al)
Broadcast O peration ....................................................................................12
Dial-Up O p e r a t i o n ....................................................................................13
Dial-Up Operation (w ith c h e c k i n g ) .............................................. 13
P oin t-to -P o in t O peration--M ultiplexer and Terminal
P oin t-to -P o in t O peration--M ultiplexer and Terminal
w ith Dial-Up Feature In s ta lle d ........................................................15
Transmit C o n t r o l - -M u lt i p l e x e r ........................................................16
S tatio n C ontrol--M ultiplexer Addressing and Polling
SPECIAL FEATURES, MODEL 1
Dial-Up A d a p t e r ....................................................................................17
Transmit Control (Prerequisite, Dial-Up Adapter Feature)
A u to m atic Disconnect Feature (World Trade Only) .
Checking - -P arity (VRC) and Block (LRC)
S tatio n Control (M ultiplexer Addressing and Polling)
A u to m atic EOB (Prerequisite , Checking Feature)
IBM 2760 A t t a c h m e n t ..........................................................................22
IBM Line Adapter (Lim ited-D istance Type 1)
IBM Line Adapter (Lim ited-D istance Type 2)
IBM Line Adapter (Leased L i n e ) ....................................................... 22
IBM Line Adapter (Shared L i n e ) ....................................................... 22
Pin-Feed P l a t e n s ................................................................................... 22
Paper Guide, Tear Bar, and Roll Paper Holder
Timing Considerations, 2740 Model 1
Tim e-O ut C o n d i t i o n s ..........................................................................23
Delay C o n d i t i o n s ................................................................................... 23
Typewriter Delay C o n d i t i o n s ....................................................... 23
Data-Handling Capability, Model 1
Terminal Transmission and Control Speed
Addressing T i m e ................................................................................... 24
Polling Time (N egative Answer B a c k ) ..............................................24
Polling Time (Positive Answer B a c k ) ..............................................24
Checking Tim e (Receive Term inal, Positive Answer Back)
Checking Time (Receive Term inal, N egative Answer Back)
Checking Tim e (Transmit Term inal, Positive Answer Back)
Checking Tim e (Transmit Term inal, N egative Answer
B a c k ) ......................................................................................................24
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IBM 2740 COMMUNICATION TERMINAL, MODEL 2
1
In tro d u c tio n .............................................................................................. 27
Communication F a c i l i t i e s .................................................................. 28
D ata S e t s ..............................................................................................28
Modes of O p e r a t i o n ........................................................................... 28
Local M o d e .....................................................................................28
C o m m u n i c a te .....................................................................................29
Codes, Keyboard Arrangem ents, and Print Elements
7
Transmission Controls and Indicators, Model 2 .
7
On/Off Power S w i t c h ..................................................................29
Keys .............................................................................................. 29
S w i t c h e s .............................................................................................. 30
Indicator L i g h t s ........................................................................... 31
Without Buffered R eceive and W ithout Record Checking
8
Special Features I n s t a l l e d ........................................................ 33
W ith Buffered Receive and W ithout Record Checking
Special Features I n s t a l l e d ........................................................ 33
9
W ith Record Checking and W ithout Buffered Receive
9
Special Features Installed .
W ith Record Checking and W ith Buffered Receive
Special Features I n s t a l l e d .........................................................34
PRINCIPLES OF OPERATION, MODEL 2
Local M o d e .....................................................................................35
Communicate M o d e ..................................................................35
S tatio n Control (M ultiplexer Addressing and Polling)
P o l l i n g ...........................................................................
A ddressing..............................................................................................36
SPECIAL FEATURES, MODEL 2
Buffer Expansion .
Record C h e c k i n g ........................................................................... 39
Operation .....................................................................................39
Transm itting T e r m i n a l .................................................................. 39
Receiving T e rm in a l........................................................................... 39
Buffered R e c e i v e ................................................................................... 40
Telegraph Line A d a p t e r ..........................................................................40
Speed Base-600 b p s ..........................................................................40
Header C o n t r o l ................................................................................... 40
Edit
Split Friction-Feed P l a t e n .........................................................41
Document I n s e r t i o n ..................................................................41
Ledger-Card S t o c k ........................................................................... 43
Operation .............................................................................................. 43
Document D e s i g n ........................................................................... 43
Paper Guide, Tear Bar, and Roll Paper Holder
Pin-Feed P l a t e n s ................................................................................... 44
IBM Line Adapter (Lim ited-D istance Type 1)
IBM Line Adapter (Lim ited-D istance Type 2)
IBM Line Adapter (Leased L i n e ) ............................................... 45
IBM Line Adapter (Shared L i n e ) ............................................... 45
Timing Considerations, Model 2
Typewriter Delay C o n d i t i o n s ............................................... 46
IBM 2740 Model 2 Data-Handling Capability
G L O S S A R Y .............................................................................................. 47
A P P E N D I X .............................................................................................. 49
INDEX
CONTENTS
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