IBM 3270 Operation Guide

,,,,,.
_,
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Cable
Length Limits
Table 2
shows
the length
limits
of signal cable.
Table
2.
Signal
Cable Length
Limits
150
ohm
150
ohm
Shielded
Shielded
Telephone
Twisted-Pair
Twisted-Pair Coaxial Twisted-Pair
(22 AWG)
(26
AWG)
(RG62A/U)
Type 3
Red
Balun
both
2000
ft
1333
ft
N/A
NIA
ends
(note
1)
Red
Balun
one
3280
ft
2186
ft
NIA N/A
end
(note
1)
DPC both
ends
4920
ft
3333
ft
NIA
N/A
(note
2)
DPC-T3
both
NIA
NIA
NIA
Yes
(note
5)
ends
(note
3)
IBM/ROLM
NIA
N/A
N/A
Yes
(note
5)
Balun
both
ends
(note
4)
DPC-T3
N/A
N/A
N/A
Yes
(note
5)
IBM/ROLM
opposite
ends
Minimum
None
None
None
100
ft
Length
Maximum
See
above
See
above
4920
ft
900
ft
Length
1 Red
Balun
is
the
IBM
Coaxial
Balun
Assembly,
P/N 8642546
2 DPC is
the
IBM
Dual
Purpose
Connector
Attachment
Cable,
PIN 6339073
(See
the
IBM
Cabling
System
Catalog,
G570-2040)
3 DPC-T3 is
the
IBM
3270 Dual
Purpose
Connector-to-Twisted-Pair
(DPC-T3)
Adapter
(See
the
IBM
3174
Site
Planning
Guide,
GA23-0213)
4 See
the
IBM/ROLM
Coax-to-Twisted-Pair
Adapter
Planning
and
Installation
Guide,
GA27-3722
5 The
telephone
twisted-pair
type
3
cable
length
must
be
between
the
minimum
and
maximum
lengths.
Note:
In
this
book,
unless
otherwise
stated, the
word
"cable"
refers
to
any of
the
above
cable
types.
5

IBM 3270 Specifications

General

Brand	IBM
Model	3270
Category	Desktop
Language	English