IBM 3270, Руководство пользователя, Страница: 18 / 58

Signal Cable Considerations
When a 3270 Card is attached to a host system, consider the
following practices for installing signal cable:
Ÿ
Installation
– Cable runs (indoor and outdoor)
– Types of signal cables and specifications (coaxial and
twisted-pair)
– Signal cable and power line separation
– Cable labeling and testing
Ÿ
Cable accessories.
Outdoor runs require additional installation guidelines, including
lightning protection. For more information, refer to the signal cable
publications listed in “Other Related Publications” on page xii.
Cable Requirements and Card Options
Table 1 shows the card requirements for various signal cable types
| and IBM products. To order these cables, contact your IBM
| Authorized Dealer or IBM Marketing Representative.
Table 1. Cable Requirements
IBM
Model
Coaxial
RG62A/U 150 ohm
Shielded
Twisted-Pair
(22 AWG)
1
150 ohm
Shielded
Twisted-Pair
(26 AWG)
1
Telephone
Twisted-Pair
Type 3
3270 Cards BNC Yes (notes 1
and 3) Yes (notes 1
and 3) Yes (notes 2 and
5)
3299 Model
1 or 3274 BNC Yes (note 1) Yes (note 3) Yes (note 2)
3299 Model
2 or 3174 BNC Yes (note 1) Yes (note 1) Yes (note 5)
3299 Model
3 NA NA NA Yes (note 4)
NA = Not applicable
1
Dual Purpose Connector (DPC)
2
IBM/ROLM Coax-to-Twisted-Pair Adapter (CTPA)
3
IBM Cabling System red balun
4
Modular jack connector
5
Dual Purpose Connector - T3 (DPC-T3)
2
3270 Emulation PCI Adapter User’s Guide