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FRADSWITCH A/S 3 PORT
Appendix: Connector Pinouts
A.1 The RS-232 Interfaces
Here are the EIA/TIA RS-232 pinouts for the FradSwitch A/S 3 Port’s RS-232/V.24
main-link-ports and for the Switch’s front-panel control port. Note that the main-
link port is a DB25 female connector with standard RS-232 pinning and that the
control port is a proprietarily pinned RJ-45 female connector.
ITU-T
Main- Control- RS-232
Signal
Signal/Lead Name
V.24
Link
Port
Circuit
Abbrev.
Circ.
(DB25) (RJ-45)
Ref.
Ref.
Pin
Pin
101
1
1
––
SHD
Shield (Chassis Ground)
102
7
7
AB
SGND
Signal Ground
103
2
5
BA
TD
Transmitted Data
104
3
3
BB
RD
Received Data
105
4
2
CA
RTS
Request to Send
106
5
8
CB
CTS
Clear to Send
107
6
–
CC
DSR
Data Set Ready
108.2
20
6
CD
DTR
Data Terminal Ready
109
8
4
CF
RLSD
Received Line Signal Detector
(CD)
(Carrier Detect)
113
24
–
DA
TSETT
Tmitr. Sgnl. Elemt. Timing (DTE)
(EXTTC)
(External Transmit Clock)
114
15
–
DB
TSETC
Tmitr. Sgnl. Elemt. Timing (DCE)
(TC)
(Transmit Clock)
115
17
–
DD
RSETC
Rcvr. Sgnl. Elemt. Timing (DCE)
(RC)
(Receive Clock)
125
22
–
CE
RI
Ring Indicator
140
21
–
RL
RL
Remote Loopback
141
18
–
LL
LL
Local Loopback
142
25
–
TM
TM
Test Mode
