Telephone Twisted-Pair; Ibm Parallel Attachment; Ibm Parallel Connector Pin Assignments - IBM 3 User Manual

Telephone Twisted-Pair

The printer can also attach to the host system or controller by a 110-ohm Telephone
Twisted-Pair (TTP) cable.
The printer requires a special signal cable, that includes a balun, for attaching to
the TTP wiring method. A balun is a length of coax cable with a bayonet connector
(BNC) on one end, and a length of telephone twisted-pair cable terminated in a
miniature 6-pin modular plug at the other end (CTPA). The balun is used for
converting from coax to telephone twisted-pair wiring. The IBM part numbers are
provided in the chart below. If this method is used for attachment, the maximum
cable length between the printer and host system or controller is 270 m (900 ft). A
balun is required at the host system or controller end.
Baluns are also available from other manufacturers. Some of them do not include
the wire necessary to attach the printer to the wall-mounted modular telephone
jack. When these baluns are used, it is important that the proper wire be selected
for making this connection. Note that even short lengths of common parallel
telephone wire, such as that sold by telephone and electronic retail stores, may
cause malfunctions in your printer. To obtain proper wire for this use, see your
IBM representative.
For detailed information about the Telephone Twisted-Pair cable, see the
IBM/ROLM Planning and Installation Guide for the 3270 Coax-to-Twisted-Pair Adapter,
GA27-3722.

IBM Parallel Attachment

The 4247 Printer supports the IBM Parallel Printer Interface. A single, 36-pin
connector is mounted on the adapter card.
Attach the PC-parallel interface to the host by using one of the following cables:
v Standard PC parallel printer cable (IBM Part Number 92F3176), up to 1.8 m (6 ft)
v 1284 Bidirectional parallel printer cable (IBM Part Number 09F5544), up to 4.57

IBM Parallel Connector Pin Assignments

332
4247 Model 003 User's Guide
IBM Part No.
IBM 61X4584
in length
m (15 ft) in length
Pin Number Signal Name
1 -STROBE
2 - 9 DATA
10 -ACKNLG
11 BUSY
12 PE
13 SLCT
14 -AUTO FEED XT
15 Unused
Description
5.9 m (18 ft) - Coax to TTP Adapter (CTCA)
Description
Strobe
Eight Data Lines
Acknowledge
Busy
Out of Paper
Printer Selected
Automatic Line Feed on EOL