tomclegg.net


Diary
Examples
    256-router
    adzap
    debian-quota
    diskonmodule
    dynip
    ezmlm-linux
    fbsdhabits
    freebsdclone
    maildirpop3d-awfulhak
    mandy
    md
    mrtg
    net-snmp
    oracle9i
    oracle9i-bsd5
    oracle9i-client
    oracle9i-nat
    php-cgi
    php-commandline
    php-image
    php-kics
    php-mini_httpd
  >pinouts<
    plesk-symlink-php
    pxe
    qmail-linux
    qmail-qfilter
    racoon-sonicwall
    redundant-vpn
    rewriterule
    smalldog
    spamassassin
    squid-tproxy
    supfile
    suse73
    svc-nmbd
    svc-smbd
    svc-smtpd
    toyotastereo
    vm
    vn-file
    wmp-invalid
    xcode-remote-install
    xen-eth0-renamed
    xen3-ubuntu-dapper
Hire Tom
Mostly Mozart
Patches
School
Scrapbook
Software
Telephones




colocation
comments
davidireland
edsgranola
faq
funsites
goodlooking
goodmovies
houserules
liberating
nodefaultroute
resume
resume2
scratch
shopping
snacks
todo
university
warisbogus

 Serial port pinouts
Posted March 23, 2005

Pin assignments for DB9 and DB25 serial ports. 
 
Signal
RTS
DTR
TXD
G/SG
G/FG
RXD
DSR
CTS
DCD
RI
 
RJ45
1
2
3
4
5
6
7
8
 
DB9
7
4
3
5

2
6
8
1
9
"terminal"
DB9
7
4
3
5

2
6
8
1
 
DB25
4
20
2
7
1
3
6
5
8
22
"terminal"
DB25
4
20
2
7
7
3
6
5


CAB-500DTF
29-0810-01
"modem"
DB25
5
8
3
7

2
20
4
"TM-T88III"
DB25
5
6
3
7

2
20
4
DB25
null modem
5
6,8
3
7
1
2
20
4
20
"rollover"
RJ45
8
7
6
5
4
3
2
1

"modem" + straight cable + "terminal"
= null modem cable with modem's DCD showing up as DSR at terminal

"modem" + rollover cable + "terminal"
= regular serial cable with modem's DCD showing up as DSR at terminal

"TM-T88III" + straight cable + "terminal"
= Epson TM-T88III printer serial port to PC serial port
(like a null modem cable, but without messing with DCD)