36
FRADSWITCH A/S 3 PORT
A.3 The V.35 Interface
Here is the ITU-T V.35 pinout for the FradSwitch A/S 3 Port’s V.35 main-link-
ports, both unadapted (proprietarily pinned out on DB25) and patched with
adapter cable (pinned out on standard M/34).
ITU-T
V.35
V.35
Signal
Signal/Lead Name
V.24
(DB25)
Adapter
Abbreviation
Circ.
Pin
(M/34)
Ref.
Pin
101
1
A
FGND
Frame Ground
102
7
B
SGND
Signal Ground
103
2
P
SD A
Send Data A
14
S
SD B
Send Data B
104
3
R
RD A
Receive Data A
16
T
RD B
Receive Data B
105
4
C
RTS
Request to Send
106
5
D
CTS
Clear to Send
107
6
E
DSR
Data Set Ready
108.2
20
H
DTR
Data Terminal Ready
109
8
F
RLSD (CD)
Rcvd. Line Signal Detector (Carrier Detect)
113
24
U
TSETT (EXTTC) A
Transmitter Signal Element Timing (DTE)
(External Transmit Clock) A
11
W
TSETT (EXTTC) B
Transmitter Signal Element Timing (DTE)
(External Transmit Clock) B
114
15
Y
TSETC (TC) A
Transmitter Signal Element Timing (DCE)
(Transmit Clock) A
12
AA
TSETC (TC) B
Transmitter Signal Element Timing (DCE)
(Transmit Clock) B
115
17
V
RSETC (RC) A
Receiver Signal Element Timing (DCE)
(Receive Clock) A
9
X
RSETC (RC) B
Receiver Signal Element Timing (DCE)
(Receive Clock) B
140
21
HH
RL
Remote Loopback*
141
18
JJ
LL
Local Loopback*
142
25
LL
TM
Test Mode*
*The Remote Loopback, Local Loopback, and Test Mode signals are pinned proprietarily on the
Switch; in the original V.35 spec, they are assigned to Pins N, L, and NN respectively.
