Cable Length Limits
Table 2 shows the length limits
of
signal cable.
Table
2.
Cable Length Limits
Adapter Adapter
No
Minimum
Maximum
Cable
Type
Both
Ends
One
End
Adapter
Length Length
IBM
610m
1000m
1500 m
None
NA
Cabling
(2000 ft) (3280
ft) (4920 ft)
System
Type 1
IBM
406m
667m
1015 m
None
NA
Cabling (1333 ft)
(2186 ft)
(3333 ft)
System
Type 9
Coaxial
NAl
NAl NAl
None
1500 m
RG62A/U
(4920 ft)
Telephone
Yes2
NA2
NA2
30m
275 m
Twisted-
(100 ft)3
(900 ft)
Pair Type 3
1
The
coaxial cable length
cannot
exceed the maximum limit.
2
The
telephone twisted-pair type 3 cable length
must
be between the minimum
and
maximum lengths.
IBM/ROLM
3270 coax-to-twisted-pair adapters
must
be used.
3
If
used with the
IBM
3299 Model
3,
the minimum length is 0.
IBM Signal Cable Publications
6
• A Building Planning Guide
for
Communication Wiring,
G320-8059
•
IBM
Cabling System Catalog, G570-2040
•
IBM
Cabling System Planning and Installation Guide,
GA27-3361
• IBM/ROLM 3270 Coax-to-Twisted-Pair Adapter Planning
and Installation Guide,
GA27-3722
•
IBM
3270 Information Display System: Installation Manual -
Physical Planning,
GA27-2787
• Installation and Assembly
of
Coaxial Cable and Accessories,
GA27-2805
• Using the
IBM
Cabling System with Communication Products,
GA27-3620.
..
,
,11
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