IBM Deskstar Deskstar 3, User Manual

Page: 342 / 392

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 Part No. Description
IBM 61X4584 5.9 m (18 ft) - Coax to TTP Adapter (CTCA)
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)
in length
v
1284 Bidirectional parallel printer cable (IBM Part Number 09F5544), up to 4.57
m (15 ft) in length
IBM Parallel Connector Pin Assignments
Pin Number Signal Name Description
1 -STROBE Strobe
2 - 9 DATA Eight Data Lines
10 -ACKNLG Acknowledge
11 BUSY Busy
12 PE Out of Paper
13 SLCT Printer Selected
14 -AUTO FEED XT Automatic Line Feed on EOL
15 Unused
332
4247 Model 003 User’s Guide