The information in this document applies to AIX Versions 3 and 4.
For 8 wire cables there is an altpin or alternate RJ-45 pinouts software setting that causes the software to treat the DSR signal as if it were DCD allowing hardware flow control to be used.
For wire connections, it is still recommended that you use at least an pin RJ-45 connector so that hardware flow control can be used.
CAUTION: 4-wire and wire connections are NOT supported or tested by IBM. Many people have gotten them to work, but others have experienced many problems trying to use these setups.
128-Port RAN Lexmark Printer 10 Pin RJ45 DB-25 Signal Pin Pin Signal GND 4 <---------> 1 Chassis Ground RxD 6 <---------- 2 TxD XON/XOFF from Printer TxD 5 ----------> 3 RxD Data to Printer CTS 8 <---------- 4 RTS RTS 3 ----------> 5 CTS DTR 9 ----------> 6 DSR \-> 8 DCD To 128port DTR SGnd 7 <---------> 7 Signal Ground DSR 2 <---------- 20 DTR DCD 10 <--/ From Printer DTR RI 1 <---------- 22 RI
pin RJ45 version 128-Port RAN Lexmark Printer 8 Pin RJ45 DB-25 Signal Pin Pin Signal GND 3 <---------> 1 Chassis Ground RxD 5 <---------- 2 TxD XON/XOFF from Printer TxD 4 ----------> 3 RxD Data to Printer CTS 7 <---------- 4 RTS RTS 2 ----------> 5 CTS DTR 8 ----------> 6 DSR \-> 8 DCD From 128-port DTR SGnd 6 <---------> 7 Signal Ground DSR 1 <---------- 20 DTR6 pin RJ11 version supports only XON/XOFF flow control. DTR pacing will not work with this configuration. pin printer operations are not recommended, and are not supported configurations.
6 pin RJ11 version 128-Port RAN Lexmark Printer 6 Pin RJ11 DB-25 Signal Pin Pin Signal GND 2 <---------> 1 Chassis Ground RxD 4 <---------- 2 TxD XON/XOFF from Printer TxD 3 ----------> 3 RxD Data to Printer CTS 6 <---------- 4 RTS RTS 1 ----------> 5 CTS /-> 6 DSR Wrap at Printer. \-< 20 DTR SGnd 5 <---------> 7 Signal Ground4-wire version supports only XON/XOFF flow control. DTR pacing will not work with this configuration. 4-wire printer operations are not recommended, and are not supported configurations. Note that with 4 wire configuration at least a pin RJ-11 is required. When using an 'LP' device to print, AIX requires that CTS be asserted. This wiring fools CTS, and has no way of knowing the printer has been turned off, unless the printer sends XOFF. In this case make sure to set Sticky XON/XOFF. The Lexmark Printer requires that DSR be raised or it will not print, hence the jumpering on the DB-25 end.
pin RJ11 version with 4 wires to printer 128-Port RAN Lexmark Printer 6 Pin RJ11 DB-25 Signal Pin Pin Signal GND 2 <---------> 1 Chassis Ground RxD 4 <---------- 2 TxD XON/XOFF from Printer TxD 3 ----------> 3 RxD Data to Printer SGnd 5 <---------> 7 Signal Ground CTS 6 <--\ /- 6 DSR Wrap Each locally. RTS 1 ---/ \-< 20 DTR
Based on HPLJ4 Pinouts: Requires that 'altpin' option be set. With this, it should support DTR flow control, or XON/XOFF. The LaserJet IV does not appear to support RTS/CTS, and the IBM print devices will not send data without CTS being asserted on the RJ45. When the printer is ready to send data, this document assumes it will assert DTR. This should drive both DSR and CTS on the RAN (Risc side). Altpin will switch the RAN DSR signal to CD (DCD), which is used for flow control with DTR pacing. You can see this by looking at the RAN port by changing the 7 segment display from AC to the number of the port that the printer is plugged into.
Alternative One: Won't work at late 3.2.5 or 4.1 128-Port RAN HPLJ4 Printer Pin RJ45 DB-25 Signal Pin Pin Signal GND 3 <---------> 1 Chassis Ground RxD 5 <---------- 2 TxD XON/XOFF from Printer TxD 4 ----------> 3 RxD Data to Printer 4 RTS (Not Avail) RTS 2 5 CTS (Not Avail) DTR 8 ----------> 6 DSR SGnd 6 <---------> 7 Signal Ground DSR 1 <---------- 20 DTR CTS 7 <-----/ Not good will toggle. Alternative Two: Deriving the CTS from the RAN DTR Altpin is still required. 128-Port RAN HPLJ4 Printer Pin RJ45 DB-25 Signal Pin Pin Signal GND 3 <---------> 1 Chassis Ground RxD 5 <---------- 2 TxD XON/XOFF from Printer TxD 4 ----------> 3 RxD Data to Printer 4 RTS (Not Avail) RTS 2 ---\ 5 CTS (Not Avail) CTS 7 <--/ DTR 8 ----------> 6 DSR SGnd 6 <---------> 7 Signal Ground DSR 1 <---------- 20 DTR/usr/lbin/tty/stty-cxma get lp4 ! to get flow control cxma dtr dtropen xon splp cxma - 128 port dtr - dtr flow control. Remove with chdev or 'stty del dtr < /dev/lp4' dtropen - dtr must be present to open port. xon - xon/xoff flow control splp - printer (vs posix of bsd for tty)
Based on Epson Pinouts from Epson Manual Technical Specifications B-12 Requires that 'altpin' option be set. With this, it should support DTR flow control, or XON/XOFF. The Epson does not appear to support RTS/CTS, and the IBM print devices will not send data without CTS being asserted on the RJ45. When the printer is ready to send data, This document assumes it will assert DTR. This should drive both DSR and CTS on the RAN (Risc side). Altpin will switch the RAN DSR signal to CD (DCD), which is used for flow control with DTR pacing. You can see this by looking at the RAN port by changing the 7 segment display from AC to the number of the port that the printer is plugged into. It has been reported that some people have had to jumper pin 20 to pin 4 on the DB25, but with these assignments this does not seem likely.
Alternative One: (This will give problems at AIX 3.2.5 and 4.1) 128-Port RAN HPLJ4 Printer Pin RJ45 DB-25 Signal Pin Pin Signal GND 3 <---------> 1 Chassis Ground RxD 5 <---------- 2 TxD XON/XOFF from Printer TxD 4 ----------> 3 RxD Data to Printer 4 RTS (Not Avail) RTS 2 5 CTS (Not Avail) DTR 8 6 DSR (Not Avail) SGnd 6 <---------> 7 Signal Ground DSR 1 <---------- 20 DTR Flow Control CTS 7 <-----/ 11 DTR also optional. Flow Control Alternative Two: Deriving the CTS from the RAN DTR Altpin is still required. 128-Port RAN HPLJ4 Printer Pin RJ45 DB-25 Signal Pin Pin Signal GND 3 <---------> 1 Chassis Ground RxD 5 <---------- 2 TxD XON/XOFF from Printer TxD 4 ----------> 3 RxD Data to Printer 4 RTS (Not Avail) RTS 2 ---\ 5 CTS (Not Avail) Wrap at 128-port CTS 7 <--/ - RTS to CTS DTR 8 ----------> 6 DSR SGnd 6 <---------> 7 Signal Ground DSR 1 <---------- 20 DTR/usr/lbin/tty/stty-cxma get lp4 ! to get flow control cxma dtr dtropen xon splp cxma - 128 port dtr - dtr flow control. Remove with chdev or 'stty del dtr < /dev/lp4' dtropen - dtr must be present to open port. (I believe) xon - xon/xoff flow control splp - printer (vs posix of bsd for tty) /usr/lbin/tty/stty-cxma altpin lp4 ! to set altpin from command line /usr/lbin/tty/stty-cxma -a lp4 ! to get altpin, clocal, settings.
The following cable diagrams have been reported to work by customers. These cables and printers are not supported, but the information is provided on an AS IS basis. IBM does not warrant that these configurations will work. In all cases hardware flow control is highly recommended. The customer reported that the printers 'altpin' needs to be set for the port for these pinouts to work.
Genicom, Printronix & 128-Port RAN DataSouth Printers Pin RJ45 DB-25 Signal Pin Pin Signal GND 3 <---------> 1 Chassis Ground RxD 5 <---------- 2 TxD XON/XOFF from Printer TxD 4 ----------> 3 RxD Data to Printer CTS 7 <--\ Wrap At 128-port RAN RTS 2 ---/ - RTS to CTS. SGnd 6 <---------> 7 Signal Ground DSR 1 <---------- 20 DTR
The following cable diagrams have been reported to work by customers. These cables and printers are not supported, but the information is provided on an AS IS basis. IBM does not warrant that these configurations will work. In all cases hardware flow control is highly recommended. The customer reported that the printers 'altpin' needs to be set for the port for these pinouts to work.
128-Port RAN Okidata Printer Pin RJ45 DB-25 Signal Pin Pin Signal GND 3 <---------> 1 Chassis Ground RxD 5 <---------- 2 TxD XON/XOFF from Printer TxD 4 ----------> 3 RxD Data to Printer CTS 7 <---------- 20 DTR SGnd 6 <---------> 7 Signal Ground DSR>DCD 1 <---------- 11 SSD RTS 2 Not connected DTR 8 Not connected
The following cable diagrams have been reported to work by customers. These cables and printers are not supported, but the information is provided on an AS IS basis. IBM does not warrant that these configurations will work. In all cases hardware flow control is highly recommended. The customer reported that the printers 'altpin' needs to be set for the port for these pinouts to work.
Dipswitch settings on TI printer Settings for 1200 Baud, no parity, autolf, autoskip 1 2 3 4 5 6 7 On On Off Off Off On On 128-Port RAN TI Printer Pin RJ45 DB-25 Signal Pin Pin Signal GND 3 <---------> 1 Chassis Ground RxD 5 <---------- 2 TxD XON/XOFF from Printer TxD 4 ----------> 3 RxD Data to Printer /-> 4 RTS Wrap at Printer \-< 5 CTS -RTS to CTS CTS 7 <---------- 20 DTR SGnd 6 <---------> 7 Signal Ground DSR>DCD 1 <---------- 11 SSD RTS 2 Not connected DTR 8 ----------> 8 DCD \-> 6 DSR To 128port DTR
Subject: Pinouts for Monarch 9420 for 128-port adapter Cable setup for RJ-45 to DB-25 Remote Async Node End +--------------------+ RJ45 pin | RJ-45 | | DB-25| /------\ | Signal | | Signal| ------ ------ +--------------------+ |-----------------| | | | . . . . . . . .| | | +_________________| | DSR 1 --- 20 DTR | 1 2 3 4 5 6 7 8 | RTS 2 --- 5 CTS | | GND 3 --- Shell | | TxD 4 --- 3 RxD | | RxD 5 --- 2 TxD | | SG 6 --- 7 SG | | CTS 7 --- 4 RTS | | DTR 8 --- 6 DSR | | | +--------------------+ Need to have altpin set for DTR flow control. Assumes that RTS on printer is on when printer is on. ~
[ Doc Ref: 91738424616396 Publish Date: Feb. 06, 2001]