k_lim@hvrford.UUCP (03/24/86)
<Munch, munch. Can I have another disk pack?>
Does anyone know the pinouts for the 8-pin modular plugs used for the serial
ports on a 3B2? We have been unable to track this down anywhere in the
documentation.
--
Kian-Tat Lim, Haverford College
...!{allegra, burdvax}!sjuvax!hvrford!k_limcdl@mplvax.ARPA (Carl Lowenstein) (03/27/86)
In article <152@hvrford.UUCP> k_lim@hvrford.UUCP writes: > >Does anyone know the pinouts for the 8-pin modular plugs used for the serial >ports on a 3B2? We have been unable to track this down anywhere in the >documentation. > --------------------------- I think it's in the manual that comes with the (4 serial + 1 parallel) ports card. In any case, here is an old news clipping. --------------------------- >From: rubin@mtuxn.UUCP (M.RUBIN) Subject: Actual pinouts of 3B2's 8-pin RS232 connectors Message-ID: <635@mtuxn.UUCP> Date: 5 Sep 85 19:40:43 GMT Organization: AT&T Information Systems, Holmdel NJ These are the ACTUAL pinouts of the 3B2's strange 8-pin modular RS232 connector, and all the known flavors of TRW modular-to-DB25 adapter (part number 232-21-25-xxx) for the 3B2, determined by inspection. It seems they did quite a bit of hacking to disguise the lack of a DSR pin. Note that the modular-modular CABLES supplied with the 3B2 are crossed over (1->8, 2->7, etc.) and the tables below assume the use of such a cable. Also note the adapter pinout list in the Appendix of the 3B2 Owner/Operator's manual is WRONG!! Yes, the male and female "Terminal/Printer" connectors are DIFFERENT. DB25 PINOUTS (see below for abbreviations) #010 #006 #008 #005 3B2 3B2 Male Female Male Male MODULAR receives sends Term./ Term./ Remote/ ACU/ PINOUTS Printer Printer Console Modem -------- -------- -------- ----- ----- ----- ----- 1 "Prot.Grd." 1 FG 1 FG 1 FG 1 FG 2 "Reserved"(CTS) <-- 4 RTS 4 RTS 5 CTS 5 CTS 3 "TXDO" <-- 3 RxD 3 RxD 2 TxD 2 TxD 4 "DTRO" <-- 8 DCD 8 DCD 6 DSR, 20 DTR 20 DTR | 5 "RXDO" --> 2 TxD 2 TxD 3 RxD | 3 RxD | 6 "DCDO" --> 6 DSR, 6 DSR 6 DSR,| 8 DCD 20 DTR 20 DTR 7 "Signal Grd." 7 SG 7 SG 7 SG 7 SG 8 "Reserved"(RTS) --> 5 CTS 5 CTS 4 RTS 4 RTS --------------------------------------------------------------------- DB25 RS-232-C "Standard" :-) PIN ABBR. NAME DIRECTION ---- ---- ---- -------------- 1 FG Frame Ground -- 2 TxD Transmit Data to DCE 3 RxD Receive Data to DTE 4 RTS Request to Send to DCE 5 CTS Clear to Send to DTE 6 DSR Data Set Ready to DTE 7 SG Signal Ground -- 8 DCD Carrier Detect to DTE 20 DTR Data Terminal Ready to DCE -- carl lowenstein marine physical lab u.c. san diego {ihnp4|decvax|akgua|dcdwest|ucbvax} !sdcsvax!mplvax!cdl
randy@chinet.UUCP (Randy Suess) (03/31/86)
In article <152@hvrford.UUCP> k_lim@hvrford.UUCP writes: >Does anyone know the pinouts for the 8-pin modular plugs used for the serial >ports on a 3B2? We have been unable to track this down anywhere in the >documentation. The diagrams are in the "Expanded input/output Capability" section. 8-pin jack 25 pin terminal 25 pin modem 1 Prot Ground 1 Frame Ground 1 Frame Ground 2 Reserved(CTS) 4 Reserved 5 Reserved 3 TXDO 3 Xmit Data 2 XMTD 4 DTRO 8 Data Term Ready 20 DTR 5 RXDO 2 Receive Data 3 RD 6 DCDO 20 Data Carrier Detect 8 DCD 7 SIG GND 7 Signal Ground 7 Signal Ground 8 Reserved(RTS) 5 Reserved 4 Reserved Hope this helps. -- .. that's the biz, sweetheart... Randy Suess chinet - Public Access UN*X (312) 545 7535 (h) (312) 283 0559 (system) ..!ihnp4!chinet!randy
emjej@uokvax.UUCP (04/05/86)
>/* Written 9:21 pm Mar 23, 1986 by k_lim@hvrford.UUCP in uokvax.UUCP:net.micro.att */ >/* ---------- "3B2 cable definition request" ---------- */ ><Munch, munch. Can I have another disk pack?> > >Does anyone know the pinouts for the 8-pin modular plugs used for the serial >ports on a 3B2? We have been unable to track this down anywhere in the >documentation. > >-- >Kian-Tat Lim, Haverford College >...!{allegra, burdvax}!sjuvax!hvrford!k_lim >/* End of text from uokvax.UUCP:net.micro.att */ The description for the RJ-45 connectors pinouts is in the back of the 3B2 Owner's Manual. They are actually quite simple... If you examine the cable closely you will find that each end is a mirror of the other (ie the pinout is reversed). Steve Blasingame (Oklahoma City) uokvax!glmnhh!bsteve